Understanding the Immune System Study Guide

Cellular Structure, Organelles, and Function

An overview of cell organization, including the cell membrane, structural molecules, and specific organelle functions.

• Organization of the cell
• Cell membrane structure
• Structural proteins and lipids
• Function of cell organelles
• Protein synthesis in the endoplasmic reticulum
• Mitochondria and oxidative phosphorylation
• Adenosine triphosphate (ATP) structure
• Ameboid locomotion and chemotaxis

Cellular Protein Structure and Intracellular Signaling

An examination of protein structure, transmembrane receptors, and the mechanisms of intracellular signal transduction.

• protein structure and folding
• tertiary structure forces
• quaternary structure of hemoglobin
• transmembrane ion channels
• transmembrane receptors
• G protein-coupled receptors
• signal transduction mechanisms
• intracellular chemical messengers
• regulation of receptors and ligands
• ionotropic and metabotropic receptors

Advanced Physiology Homeostasis and Internal Milieu

An introduction to the internal milieu, body fluid compartments, and the mechanisms used by multi-cellular organisms to maintain homeostasis.

• internal milieu
• body fluid compartments
• homeostasis
• feedback loops
• local, humoral and neural control mechanisms
• nutrient and waste product exchange
• diffusion of nutrients
• cellular functional systems

Resting Membrane Potential and Ion Gradients

This material explores the physiological principles of gradients, electrochemical equilibrium, and the factors influencing resting membrane potential.

• Resting membrane potential
• Ion equilibrium potential
• Electrochemical gradients
• Nernst equation
• Ion concentration gradients
• Na+/K+ ATPase pump
• Intracellular and extracellular ion concentrations
• Hydrostatic and chemical concentration gradients
• Electrogenic properties of ion pumps

The Nervous System CNS Basics

An overview of the central and peripheral nervous systems, including neuroanatomy, cell functions, and signal propagation.

• CNS and PNS organization
• Sensory and motor neuron functions
• Spinal cord neuroanatomy
• Cranial nerve structure
• Basic signal propagation
• Sympathetic nervous system organization
• Skeletal motor nerve pathways

The Action Potential and Ion Channel Activity

This material covers the stages of the action potential, the role of voltage-gated ion channels, and the mechanics of membrane potential changes.

• Resting Membrane Potential
• Stages of the Action Potential
• Depolarization and Repolarization
• Voltage-gated Na+ and K+ channels
• Conformational changes in membrane proteins
• Ion channel open probability
• Membrane ion channel conductance
• Voltage clamp experiment

Initiation and Propagation of Action Potentials

An examination of the role of ions, voltage-gated channels, and membrane properties in generating and transmitting action potentials.

• Role of calcium ions in action potentials
• Voltage-gated sodium and calcium channels
• Initiation of action potential via depolarization
• Rhythmic spontaneous depolarization in pacemaker cells
• Propagation of action potentials through local circuits
• Saltatory conduction in myelinated nerve fibers
• Absolute and relative refractory periods
• Re-establishing ionic gradients via Na+/K+ ATPase pump

The Neuromuscular Junction and Endplate Potential

• Neuromuscular junction anatomy
• Acetylcholine synthesis and release
• Nicotinic acetylcholine receptors
• Ligand-gated ion channel mechanisms
• Voltage-gated calcium channels
• Endplate potential generation
• Electrotonic conduction
• Excitation-contraction coupling
• Acetylcholinesterase metabolism
• Muscle action potential propagation

Basic Skeletal Muscle Anatomy and Physiology

An overview of skeletal muscle structure, the sliding filament mechanism, length-tension relationships, and muscle contraction types.

• myosin and actin filament structure
• crossbridge cycling
• sliding filament theory
• role of troponin and tropomyosin
• muscle length-tension relationship
• active and passive tension
• energy sources for muscle contraction
• fast twitch and slow twitch muscle fibers
• isometric and isotonic contractions

Unitary and Multi-Unit Smooth Muscle

An examination of smooth muscle types, focusing on the anatomy, molecular mechanisms, and electrical communication of unitary and multi-unit smooth muscle.

• Unitary smooth muscle
• Multi-unit smooth muscle
• Syncytium
• Smooth muscle contraction mechanisms
• Excitation-contraction coupling
• Dense bodies
• Neuronal varicosities
• Smooth muscle action potential propagation

Molecular Mechanisms of Smooth Muscle Contraction

An examination of the molecular signaling, calcium regulation, and autonomic transmission mechanisms that govern smooth muscle contraction and relaxation.

• calcium-calmodulin complex formation
• myosin light chain kinase phosphorylation
• smooth muscle latch mechanism
• excitation-contraction coupling
• autonomic neurotransmission via varicosities
• role of MLCK and MLCP
• calcium-induced calcium release
• myogenic response to stretch
• energy efficiency of smooth muscle
• regulation by hormones and local tissue factors

The Autonomic Nervous System and Regulation

An overview of the autonomic nervous system's anatomical organization, physiological effects, and neural control of blood pressure.

• Anatomical organization of the autonomic nervous system
• Sympathetic and parasympathetic nervous system functions
• Involuntary control of visceral functions
• Reflex control of blood pressure via baroreceptors
• Role of the nucleus tractus solitarius
• Hypothalamus as an integrative center of autonomic function
• Sympathetic fight or flight response
• Parasympathetic rest and digest response
• Autonomic nervous system tone

Synaptic Transmission and Nervous System Anatomy

An overview of chemical synapses, postsynaptic receptors, and the anatomical structures of the brain and somatic nervous system.

• Chemical synapses in the central nervous system
• Postsynaptic receptors and their functions
• EPSPs and IPSPs
• Spatial and temporal summation
• Synaptic transmission facilitation
• Brainstem anatomy including medulla oblongata, pons, and midbrain
• Cortical and subcortical brain levels
• Somatosensory and somatomotor axes
• Sensory inputs to the motor cortex
• Integrative function of the nervous system

Advanced Physiology Sensory-Motor Pathways

An examination of sensory stimulus transduction, sensory modalities, receptor types, and the transmission of sensory and motor information through neural pathways.

• Sensory stimulus transduction
• Types of sensory modalities
• Types of sensory receptors
• Action potential generation
• Nerve fiber characteristics
• Somatosensory and somatomotor pathways
• Sensory and motor transmission pathways
• Somatic vs autonomic sensory motor pathways
• Pain modulation
• Mechanoreceptor function

Somatic and Autonomic Nerve Fiber Characteristics

An examination of nerve fiber classifications including diameter, myelination, conduction velocity, and their specific sensory and motor functions within somatic and autonomic systems.

• Somatic sensory nerve fiber types
• Autonomic sensory and motor fibers
• Muscle spindle and Golgi tendon organ A-fibers
• Sensory-motor reflex arc mechanism
• Relationship between fiber diameter and conduction velocity
• Myelination and its effect on nerve function
• Classification of A, B, and C fibers
• Regional anesthesia nerve block sequence

Mechanisms of Human Respiration Control

Human respiration is controlled by neural and chemical mechanisms that regulate breathing rate and depth.

• Gas convection
• Gas diffusion
• Gas loading and transport
• Ventilatory pump
• Central chemoreceptors
• Peripheral chemoreceptors
• Respiratory controller

Lung Anatomy and Respiratory Zones

An overview of the respiratory tract divisions, airway histology, alveolar structures, and the respiratory membrane.

• Conducting zone
• Respiratory zone
• Alveoli
• Type I and Type II alveolar cells
• Airway smooth muscle
• Pulmonary ventilation
• Respiratory membrane layers

Lung Volumes and Respiratory Capacities

An overview of pulmonary volumes, capacities, and the distinction between anatomic and physiologic dead space.

• Tidal Volume (VT)
• Inspiratory Reserve Volume (IRV)
• Expiratory Reserve Volume (ERV)
• Residual Volume (RV)
• Inspiratory Capacity (IC)
• Functional Residual Capacity (FRC)
• Vital Capacity (VC)
• Total Lung Capacity (TLC)
• Anatomic Dead Space (VD)
• Alveolar Volume (VA)
• Physiologic Dead Space
• Alveolar Dead Space

Lung Mechanics and Negative Pressure Breathing

This lecture covers the mechanical processes of negative pressure breathers, the role of the pleural space, and the interaction between the lung and chest wall.

• Single Compartment Model
• Muscles of Inspiration
• Parietal and Visceral Pleura
• Intrapleural Pressure (PpI)
• Alveolar Interdependence
• Laplace's Law
• Negative Pressure Ventilation

Lung Mechanics and Functional Residual Capacity

This topic explores the mechanical interaction between lung and chest wall elastic recoil pressures and their role in determining functional residual capacity.

• Lung elastic recoil pressure (Pel)
• Chest wall elastic recoil
• Functional Residual Capacity (FRC)
• Intrapleural pressure (Ppl)
• Static conditions
• Pulmonary fibrosis
• Alveolar interdependence

Fundamentals of Lung Mechanics and Compliance

An analysis of lung mechanics focusing on the relationship between compliance, elastic recoil, and alveolar distending pressure.

• Lung elastic recoil
• Chest wall elastic recoil
• Functional residual capacity (FRC)
• Static Conditions
• Compliance
• Elastic recoil (elastance)
• Alveolar distending pressure

Lung Mechanics, Surface Tension, and Resistance

This topic explores how surface tension, surfactant, and radial traction influence alveolar stability, lung compliance, and airway resistance.

• Surface tension
• Air-liquid interface (ALI)
• Surfactant
• Alveolar interdependence
• Radial traction
• Poiseuille’s Law
• Work of breathing (WOB)
• Laminar and turbulent flow
• Compliance

Principles of Lung Mechanics

An analysis of the ventilatory pump, work of breathing, and the interaction between lung and chest wall elastic recoil.

• Work of Breathing (WOB)
• Elastic Component
• Resistance Component
• Elastic Recoil
• Surface Tension
• Frictional Resistance
• Airflow Resistance
• Functional Residual Capacity (FRC)
• Closing Capacity
• Radial Traction

RBCs and Blood Coagulation

The process of erythropoiesis, the role of erythropoietin, and the mechanism of hemoglobin binding to oxygen.

• erythropoiesis
• hematopoiesis
• erythropoietin
• erythrocytes
• hemoglobin
• oxygen binding affinity
• positive cooperative binding
• carbonic anhydrase
• acid-base buffering
• polycythemia
• sickle cell anemia
• iron-deficiency anemia
• blood coagulation
• platelet adhesion
• thrombin generation
• fibrin deposition
• fibrinolysis

Hemostasis and Blood Coagulation Mechanisms

Hemostasis promotes homeostasis through vascular constriction, platelet plug formation, and the blood coagulation cascade to prevent blood loss.

• Hemostasis
• Vascular constriction
• Platelet plug formation
• Blood coagulation
• Fibrinogen crosslinking
• Coagulation cascade
• Antithrombin
• Endogenous anticoagulation
• Thrombomodulin
• Fibrinolysis
• Tissue plasminogen activator (t-PA)
• Plasminogen

• Hemostasis and Blood Coagulation Mechanisms

  Read · 4 min

• Import & open

  Flashcards

  Import to get started

• Import & open

  Quiz

  Import to get started

• Import & open

  Practice test

  Import to get started

• Import & open

  Listen

  Import to get started

• Import & open

  Tutor Me

  Import to get started

• Import & open

  Watch

  Import to get started

• Import & open

  Chat

  Import to get started

• Import & open

  Arcade

  Import to get started

Basic Immunology and Host Defense

An overview of host defense mechanisms including the innate immune system and the adaptive immune system.

• Pathogen
• Innate immune system
• Adaptive immune system
• Inflammation
• Complement cascade
• Membrane attack complex
• Antibody response
• T cells
• B cells
• Clonal selection
• Pattern recognition receptors (PRR)
• Pathogen-associated molecular patterns (PAMPs)
• Toll-like receptors (TLRs)

• Basic Immunology and Host Defense: An Overview of the Immune Response

  Read · 6 min

• Import & open

  Flashcards

  Import to get started

• Import & open

  Quiz

  Import to get started

• Import & open

  Practice test

  Import to get started

• Import & open

  Listen

  Import to get started

• Import & open

  Tutor Me

  Import to get started

• Import & open

  Watch

  Import to get started

• Import & open

  Chat

  Import to get started

• Import & open

  Arcade

  Import to get started

Basic Immunology and Immune Cell Functions

Immune cells utilize receptors to sense chemokine concentrations and migrate into tissue through processes like leukocyte extravasation and chemotaxis.

• leukocyte chemotaxis
• leukocyte extravasation
• macrophages
• monocytes
• phagocytosis
• polymorphonuclear neutrophil
• eosinophils
• mast cells
• degranulation
• lymphocytes
• T cells
• B cells
• NK cells
• cell-mediated immunity
• humoral immunity
• cytokines

Basic Endocrine Physiology and Hormonal Regulation

This content covers mechanisms of normal hormonal regulation, the structure and function of the hypothalamic-pituitary axis, and the general characteristics of hormones.

• Mechanisms of normal hormonal regulation
• Posterior pituitary
• Anterior pituitary
• Negative feedback
• Hormone secretion rhythms
• Hormone inactivation and excretion
• Endocrine system functions

Methods of Transport Across Cell Membranes

This material covers how hydrophilic and hydrophobic substances move across the cell membrane through diffusion, facilitated diffusion, and active transport.

• Simple diffusion through lipid bilayer
• Facilitated diffusion using carrier proteins or ion channels
• Active transport using membrane pumps
• Movement down concentration gradients
• Osmosis through semi-permeable membranes
• Role of gated ion channels
• Relationship between osmolality, osmolarity and tonicity
• Sodium-potassium ATPase pump

Osmotic Pressure and Tonicity

This material explains the principles of osmotic pressure, the differences between osmolality and osmolarity, and how solute permeability affects tonicity.

• osmotic pressure
• hydrostatic pressure
• hypertonic solution
• hypotonic solution
• isotonic solution
• osmolality vs osmolarity
• solute permeability
• concentration gradients
• urea membrane permeability

Tonicity and Sucrose Osmosis

An examination of sucrose membrane permeability and its effects on fluid volume during osmosis.

• sucrose membrane permeability
• osmosis
• tonicity
• fluid volume changes

Body Fluid Compartments and Microcirculation

An overview of total body fluid distribution, the composition of the internal milieu, and the pressures governing capillary fluid filtration.

• intracellular and extracellular fluid compartments
• the internal milieu
• interstitial fluid and the interstitium
• capillary exchange of small substances
• hydrostatic and colloid osmotic pressures
• net filtration pressure
• capillary fluid exchange at arterial and venous ends

Equilibrium Potential and Resting Membrane Potential

An explanation of the Nernst equation for calculating equilibrium potential and how ion permeability affects the resting membrane potential.

• Equilibrium potential
• Nernst equation
• Electromotive force
• Ion concentration gradients
• Membrane permeability
• Resting membrane potential
• Sodium and potassium ion dynamics

Excitation-Contraction Coupling in Muscle Fibers

This material explains how action potentials trigger calcium release from the sarcoplasmic reticulum to cause muscle contraction and relaxation.

• Excitation-contraction coupling
• Action potential transmission via T-tubules
• Calcium release from the SR
• Calcium reuptake into the SR
• Frequency summation of muscle twitches
• Calcium sequestration and energy requirements
• Sustained calcium levels in the sarcoplasm
• Muscle contraction and relaxation mechanisms

Neural Transmission and Skeletal Muscle Contraction

This material covers the anatomy of motor neurons, the function of motor units, and the physiological mechanisms of muscle contraction force and fatigue.

• Central and peripheral motor neurons
• Alpha motor neuron anatomy
• Motor unit function
• Multiple fiber summation
• Frequency summation and tetany
• Excitation-contraction coupling
• Muscle tone and fatigue
• Muscle denervation and degeneration
• Calcium release and troponin activation
• Length-tension relationship

Autonomic Nervous System Anatomical Organization

An examination of the anatomical pathways, cell body locations, and physiological effects of the sympathetic and parasympathetic nervous systems.

• Sympathetic and parasympathetic nervous system functions
• Thoracolumbar sympathetic outflow
• Sympathetic chain and paravertebral ganglia
• Preganglionic and postganglionic neuron locations
• Vagus nerve parasympathetic innervation
• Sacral parasympathetic fiber pathways
• Communicating rami and spinal nerve innervation

Central Nervous System Chemical Synapses

An overview of chemical synapse structures, neurotransmission processes, and the functions of ionotropic and metabotropic receptors.

• Presynaptic terminal and transmitter vesicles
• Ionotropic receptors as ligand-gated ion channels
• Metabotropic receptors and second messenger systems
• G proteins in cellular responses
• Excitatory postsynaptic potentials (EPSP)
• Inhibitory postsynaptic potentials (IPSP)
• Membrane potential hyperpolarization and depolarization
• Ion permeability and electrochemical signaling

Somatosensory and Motor Transmission Pathways

An overview of the sensory and motor pathways including the somatosensory cortex, DCML, anterolateral, and lateral corticospinal pathways.

• Somatosensory Cortex Areas I and II
• Sensory homunculus and sensory projections
• Somatomotor pathways and motor homunculus
• Dorsal Column Medial Lemniscal (DCML) Pathway
• Anterolateral Somatic Sensory Pathway
• Lateral Corticospinal Pathway
• Sensory and motor neuron decussation
• Synapse in sensory pathways
• Fine touch, pressure, vibration, and proprioception
• Pain and temperature sensation
• Primary and secondary efferent motor neurons

Mechanisms of Respiratory Control

The respiratory controller consists of CNS neurons, a central rhythm generator, and a central modulator that manage the ventilatory pump through automatic and voluntary control.

• Respiratory Controller
• Ventral Respiratory Group (VRG)
• Pneumotaxic Center
• Central Chemoreceptors
• Peripheral Chemoreceptors
• Arterial PCO2
• Homeostasis

Transmural and Transpulmonary Pressure Mechanics

This content defines transmural pressure and transpulmonary pressure as pressure differences across airway and alveolar walls.

• Transmural pressure
• Transpulmonary pressure
• Transalveolar pressure
• Alveolar pressure (PA)
• Pleural pressure (Ppl)
• Distending pressure
• Inflation pressure

Lung Mechanics and Dynamic Airway Compression

This topic explores transpulmonary pressure, lung elastic recoil, and the mechanisms of dynamic compression of the airways during expiration.

• Transpulmonary pressure (Ptp)
• Elastic lung recoil pressure (Pel)
• Airway distending pressure (Padp)
• Dynamic compression of the airways
• Equal pressure point
• Radial traction
• Expiratory flow rate

Pulmonary Hemodynamics and Microcirculation

An analysis of pulmonary capillary dynamics, fluid filtration, and regional blood flow distribution.

• Pulmonary Capillary Dynamics
• Interstitial Fluid Pressure
• Pulmonary Edema Safety Factor
• Hypoxic Pulmonary Vasoconstriction (HPV)
• Pulmonary Vascular Resistance (PulmVR)
• Regional Distribution of Blood Flow
• Starling Forces

Gas Transport and Hemoglobin Function

Red blood cells transport hemoglobin to carry oxygen to tissues and aid acid base buffering through carbonic anhydrase.

• RBCs (erythrocytes)
• Hemoglobin synthesis
• Oxyhemoglobin Dissociation Curve
• O2 Transport in the Blood
• Carbon Dioxide Dissociation Curve
• Respiratory Exchange Ratio
• Carbonic anhydrase
• Acid-base buffering
• Anemia
• Hematocrit
• MCHC

Cellular Mechanisms of Hormone Action

Endocrine glands release water-soluble and lipid-soluble hormones that utilize hormone receptors, signal transduction, and second-messenger molecules to affect target cells.

• Water-soluble hormones
• Lipid-soluble hormones
• Hormone receptors
• Signal transduction
• Second-messenger molecules
• Cyclic adenosine monophosphate (cAMP)
• DNA transcription and translation
• Autocrine signaling
• Paracrine signaling
• Endocrine signaling
• Hormone up-regulation
• GPCRs
• Ligand-gated ion channels

Calcium Homeostasis and PTH Regulation

Parathyroid hormone regulates plasma levels of calcium and phosphate through bone resorption and renal mechanisms including filtration, reabsorption, secretion, and excretion.

• Ca2+ distribution
• Parathyroid hormone (PTH) actions
• Bone resorption
• Renal reabsorption
• Renal excretion
• Filtration processes
• Calcium-sensing GPCRs
• Phosphate regulation
• Magnesium influence on PTH release

Homeostasis and Regulatory Control Mechanisms

An exploration of how organisms maintain internal stability through the regulation of the extracellular fluid and various feedback systems.

• Homeostasis and internal milieu
• Extracellular fluid components
• Negative and positive feedback
• Sensory-motor reflex arc
• Local, humoral, and neural communication
• Regulatory control systems
• Capillary fluid exchange
• Starling-Equilibrium Filtration

NMJ Safety Margin, Fatigue, and Pharmacology

This material covers the neuromuscular junction safety margin, mechanisms of fatigue, and various drugs that affect synaptic transmission.

• NMJ safety margin
• Neuromuscular junction fatigue
• Acetylcholine vesicle release
• Endplate potential
• nAChR antagonists
• Acetylcholinesterase inhibitors
• Voltage-gated Ca2+ channel roles
• Acetylcholine-like agents

Adrenergic Function and Adrenergic Pharmacology

This material covers the sympathetic nervous system pathway to the adrenal medulla and the comparative potency of epinephrine and norepinephrine at various adrenergic receptor subtypes.

• preganglionic sympathetic fiber pathway
• chromaffin cells in the adrenal medulla
• epinephrine and norepinephrine release
• adrenoceptor subtypes
• epinephrine affinity for beta receptors
• selective activation of beta 2 receptors
• potency of epinephrine and norepinephrine

Autonomic Nervous System Neurotransmitters and Pharmacology

An examination of autonomic nervous system neurotransmitters, receptor subtypes, physiological effects, and pharmacological mechanisms.

• Cholinergic and adrenergic nerve fibers
• Neurotransmitter metabolism and degradation
• Sympathetic and parasympathetic physiological effects
• Sympathomimetic and ganglionic blockade drugs
• Global versus discrete organ stimulation
• Denervation supersensitivity

Postsynaptic Potentials and Electrotonic Conduction

This material explores how local postsynaptic potentials move through electrotonic conduction and the processes of dendritic excitation and axon hillock modulation.

• resting membrane potential
• excitatory postsynaptic potentials
• inhibitory postsynaptic potentials
• electrotonic conduction
• decremental conduction
• regenerative propagation
• dendritic excitation
• axon hillock modulation

Spatial and Temporal Summation of Voltage Changes

An explanation of how excitatory and inhibitory post-synaptic potentials summate to reach threshold in postsynaptic neurons.

• Temporal summation of EPSPs
• Spatial summation of EPSPs and IPSPs
• Post-synaptic neuron threshold
• All or nothing action potentials
• Electrical conductivity of the soma
• Summation of post-synaptic potentials

Characteristics and Mechanisms of Synaptic Transmission

An examination of synaptic fatigue, facilitation, neurotransmitter types, and the mechanisms of spontaneous action potentials.

• Synaptic transmission fatigue
• Postsynaptic receptor inactivation
• Neuronal excitability and pH
• Synaptic facilitation
• Temporal and spatial summation
• Rapidly acting small molecule transmitters
• Slowly acting neuropeptides and growth factors
• Spontaneous action potential rhythmicity
• Pacemaker cells

SMP Modulation of Sensory-Motor Reflex

This material explores how sensory information modulates motor activity through spinal cord and higher brain centers, including the activation of the autonomic nervous system.

• sensory-motor reflex modulation
• motor tone and skeletal muscle activation
• muscle spindle sensory firing
• somatic sensory activation of the autonomic nervous system
• sympathetic nervous system efferent neurons
• vasoconstriction via smooth muscle cells
• reflex arcs and neuroanatomy

Sensory-Motor Pathways and Endogenous Analgesia

This material covers the neuroanatomy of pain pathways, the mechanisms of endogenous analgesia, and the functions of the reticular activating system.

• Referred pain through sensory convergence
• Endogenous analgesia systems
• Enkephalin-containing neurons and opioid receptors
• Reticular activating system functions
• Anterolateral somatosensory tract components
• Lateral spinothalamic tract
• Spinomesencephalic and spinoreticular tracts
• Sensory information transmission via spinal cord tracts
• Corticospinal tract motor control

Reflex and Neuromuscular Control of Respiration

Regulation of respiration involves the Hering Breuer inflation reflex, the pneumotaxic center, and various mechanoreceptors that control respiratory rhythms and motor pathways.

• Pneumotaxic center
• Stretch receptors
• Lung J receptors
• Respiratory motor pathways
• Vagus nerve
• Respiratory center depression

Lung Mechanics and Airway Caliber

This content illustrates pulmonary mechanics, airway caliber, and the physiological implications of emphysema and closing volume.

• Radial traction
• Airway caliber
• Emphysema
• Expiratory flow rate
• Obstructive and restrictive lung diseases
• Closing volume
• Airway closure
• FEV1.0/FVC
• Spirometry volume-time curve

Physicochemical Principles of Gas Diffusion

• Diffusion of gases
• Partial pressure
• Solubility of a gas in a liquid
• Driving pressure
• Chemical gradient
• Fick's Law for Diffusion
• Alveolar ventilation
• Equilibrium

Oxyhemoglobin Dissociation Curve and Gas Exchange

The oxyhemoglobin dissociation curve illustrates the sigmoidal relationship between oxygen partial pressure and hemoglobin saturation levels during respiratory physiology and gas exchange.

• Oxyhemoglobin dissociation curve
• Hemoglobin saturation
• Oxygen partial pressure (PO2)
• Oxygen unloading
• Respiratory physiology
• Gas exchange
• Flat portion of the curve
• Steep portion of the curve
• Oxygen reserve
• Exercise physiology

Basic Endocrinology and Endocrine Physiology

Endocrine disorders arise from dysfunction of hormone production, feedback systems, and cell signaling mechanisms.

• Elevated or depressed hormone levels
• Failure of feedback systems
• Intracellular disorders
• Cyclic adenosine monophosphate (cAMP)
• Neuroendocrine response to stress
• Corticotropin-releasing hormone
• Aging and the endocrine system
• Glandular atrophy
• Genomic and nongenomic cell signaling
• Endocrine, paracrine and autocrine pathways