Course Overview

This syllabus outlines the major topics covered in a college-level Anatomy & Physiology I course. The schedule includes lectures, quizzes, and exams, with each session focusing on a specific aspect of human physiology and anatomy. Below is a structured summary of the main topics and subtopics, expanded with academic context to aid in exam preparation.

Physiological Control Systems

Introduction to Homeostasis

• Definition: Homeostasis refers to the maintenance of a stable internal environment within the body.

• Key Components: Sensors, control centers, and effectors.

• Example: Regulation of body temperature.

Membrane Transport and Cell Volume Regulation

Membrane Potentials

• Definition: The electrical potential difference across a cell membrane.

• Key Equation: Nernst equation for equilibrium potential:

• Application: Essential for nerve impulse transmission.

Action Potentials

• Definition: Rapid changes in membrane potential that propagate along neurons.

• Phases: Depolarization, repolarization, hyperpolarization.

• Example: Muscle contraction initiation.

Synaptic Transmission and Neural Physiology

Local and Synaptic Potentials

• Local Potentials: Graded changes in membrane potential due to stimulus.

• Synaptic Transmission: Communication between neurons via neurotransmitters.

• Example: Acetylcholine release at neuromuscular junction.

Reflexes and Sensory Adaptation

• Spinal Reflexes: Automatic responses to stimuli mediated by the spinal cord.

• Sensory Adaptation: Decreased response to a constant stimulus over time.

Muscle Physiology

Skeletal Muscle Cellular Physiology

• Muscle Contraction: Involves actin and myosin filaments sliding past each other.

• Key Equation: Force generation: where is the number of cross-bridges and is the force per cross-bridge.

• Application: Movement and posture maintenance.

Cardiac and Smooth Muscle Physiology

Cardiac Muscle

• Electrophysiology: Involves pacemaker cells and action potentials.

• Heart as a Pump: Cardiac cycle includes systole and diastole.

• Electrocardiogram (ECG): Records electrical activity of the heart.

Smooth Muscle

• Function: Controls involuntary movements in organs.

• Example: Peristalsis in the digestive tract.

Sensory Systems

Overview of Sensory Physiology

• Types: Vision, hearing, equilibrium, touch.

• Key Structures: Retina (eye), cochlea (ear).

• Example: Photoreceptors detect light in the retina.

Autonomic Nervous System

Function and Organization

• Divisions: Sympathetic and parasympathetic systems.

• Role: Regulates involuntary functions such as heart rate and digestion.

Cardiovascular Physiology

Cardiac Cycle and Hemodynamics

• Cardiac Cycle: Sequence of events in one heartbeat.

• Hemodynamics: Study of blood flow and pressure.

• Key Equation: Blood flow: where is flow, is pressure difference, and is resistance.

Microcirculation and Lymphatics

• Microcirculation: Exchange of nutrients and waste at capillary level.

• Lymphatic System: Returns excess fluid to the bloodstream.

Respiratory Physiology

Pulmonary Ventilation and Gas Exchange

• Ventilation: Movement of air in and out of the lungs.

• Gas Exchange: Occurs in alveoli; oxygen enters blood, carbon dioxide is removed.

• Key Equation: Oxygen transport:

Renal Physiology

Renal Blood Flow and Filtration

• Nephron: Functional unit of the kidney.

• Filtration: Removal of waste from blood.

• Key Equation: Glomerular filtration rate (GFR):

Fluid and Electrolyte Balance

• Homeostasis: Regulation of sodium, potassium, and water.

• Example: Antidiuretic hormone (ADH) controls water reabsorption.

Endocrine Physiology

Hormonal Regulation

• Major Glands: Pituitary, thyroid, adrenal, pancreas.

• Functions: Growth, metabolism, stress response.

• Example: Insulin regulates blood glucose levels.

Reproductive Physiology

Male and Female Reproductive Systems

• Male Physiology: Spermatogenesis, hormonal control.

• Female Physiology: Oogenesis, menstrual cycle, pregnancy, lactation.

• Example: Estrogen and progesterone regulate the menstrual cycle.

Hematology

Introduction to Hematology

• Blood Components: Red blood cells, white blood cells, platelets, plasma.

• Functions: Oxygen transport, immune defense, clotting.

Summary Table: Major Systems and Functions

Additional info: The above study guide is based on the syllabus schedule and expanded with standard academic context for each topic. Students should refer to lecture notes and textbooks for detailed mechanisms and clinical applications.