Chapter 1: Introduction to Anatomy and Physiology

Subdivisions of Anatomy & Physiology

Anatomy is the study of body structure, while physiology is the study of body function. Both are subdivided for detailed study.

• Gross Anatomy: Study of structures visible to the naked eye (e.g., organs, muscles).

• Microscopic Anatomy: Study of structures requiring magnification (e.g., cells, tissues).

• Systemic Physiology: Study of function of organ systems (e.g., cardiovascular physiology).

• Pathophysiology: Study of how disease affects body function.

Body System Functions and Major Organs

• Integumentary: Skin, hair, nails; protects body, regulates temperature.

• Skeletal: Bones, joints; supports, protects, enables movement.

• Muscular: Muscles; movement, posture, heat production.

• Nervous: Brain, spinal cord, nerves; control, communication.

• Endocrine: Glands; hormone production, regulation.

• Cardiovascular: Heart, blood vessels; transport of nutrients, gases.

• Lymphatic: Lymph nodes, vessels; immunity, fluid balance.

• Respiratory: Lungs, airways; gas exchange.

• Digestive: Stomach, intestines; nutrient breakdown, absorption.

• Urinary: Kidneys, bladder; waste elimination, fluid balance.

• Reproductive: Ovaries, testes; reproduction.

Directional Terms, Body Cavities, and Homeostasis

• Directional Terms: Anterior/posterior, superior/inferior, medial/lateral, proximal/distal.

• Body Cavities: Dorsal (cranial, vertebral), ventral (thoracic, abdominopelvic).

• Homeostasis: Maintenance of stable internal environment.

• Feedback Loops: Negative feedback reverses a change (e.g., temperature regulation); positive feedback amplifies a change (e.g., blood clotting).

Chapter 2: The Chemistry of Life

Chemical Reactions and Macromolecules

• Dehydration Synthesis: Joins molecules by removing water.

• Hydrolysis: Breaks molecules by adding water.

• pH: Measure of hydrogen ion concentration;

• Organic Macromolecules: Carbohydrates (energy), lipids (membranes, energy), proteins (structure, enzymes), nucleic acids (genetic info).

• Enzymes: Biological catalysts that speed up reactions by lowering activation energy.

Chapter 3: The Cell

Cell Structure and Function

• Organelles: Nucleus (genetic info), mitochondria (ATP production), ER (protein/lipid synthesis), Golgi (modification/packaging), lysosomes (digestion).

• Membrane Transport: Passive (diffusion, osmosis), active (pumps, endocytosis).

• Cell Cycle: Interphase (G1, S, G2), mitosis (prophase, metaphase, anaphase, telophase), cytokinesis.

• Protein Synthesis: Transcription (DNA to mRNA), translation (mRNA to protein).

Chapter 4: Histology

Four Tissue Types and Membranes

• Epithelial: Covers surfaces, lines cavities; protection, absorption.

• Connective: Supports, binds, protects; bone, blood, cartilage.

• Muscle: Movement; skeletal, cardiac, smooth.

• Nervous: Communication; neurons, neuroglia.

• Membranes: Mucous (lines cavities open to exterior), serous (lines closed cavities), cutaneous (skin), synovial (joints).

Chapter 5: The Integumentary System

Structure and Function

• Functions: Protection, temperature regulation, sensation, vitamin D synthesis.

• Skin Layers: Epidermis (outer), dermis (middle), hypodermis (deepest).

• Accessory Structures: Hair, nails, glands (sebaceous, sweat).

Chapter 6: Bones and Bone Tissue

Structure, Function, and Ossification

• Functions: Support, protection, movement, mineral storage, blood cell formation.

• Bone Anatomy: Diaphysis, epiphysis, periosteum, endosteum, marrow.

• Ossification: Endochondral (from cartilage), intramembranous (from mesenchyme).

Chapter 8: Articulations

Joint Types and Movements

• Fibrous Joints: Immovable (e.g., sutures).

• Cartilaginous Joints: Slightly movable (e.g., intervertebral discs).

• Synovial Joints: Freely movable (e.g., knee, shoulder).

• Functional Classification: Synarthroses (immovable), amphiarthroses (slightly movable), diarthroses (freely movable).

• Movements: Flexion, extension, abduction, adduction, rotation.

Chapter 10: Muscle Tissue and Physiology

Muscle Types and Contraction

• Functions: Movement, posture, heat production.

• Organization: Muscle fiber, fascicle, muscle.

• Excitation-Contraction Coupling: Sequence from nerve signal to muscle contraction.

• Contraction Cycle: Cross-bridge formation, power stroke, detachment, reactivation.

• Tension Generation: Depends on fiber length, frequency of stimulation, number of fibers.

• Substrate Utilization: ATP from creatine phosphate, glycolysis, aerobic respiration.

• Muscle Types: Skeletal (voluntary, striated), cardiac (involuntary, striated), smooth (involuntary, non-striated).

Chapter 11: Introduction to the Nervous System and Nervous Tissue

Organization and Electrophysiology

• Organization: Central (CNS) and peripheral (PNS) nervous systems.

• Neuron Anatomy: Cell body, dendrites, axon.

• Neuron Classes: Sensory (afferent), motor (efferent), interneurons.

• Neuroglia: Support cells (astrocytes, oligodendrocytes, Schwann cells, etc.).

• Resting Potential: Difference in charge across membrane; typically -70 mV.

• Depolarization: Membrane potential becomes less negative.

• Repolarization: Return to resting potential.

• Hyperpolarization: Membrane potential becomes more negative than resting.

• Action Potential: Rapid change in membrane potential; all-or-none event.

• Propagation: Movement of action potential along axon.

• Synapses: Chemical (neurotransmitter release), electrical (gap junctions).

• EPSPs/IPSPs: Excitatory/inhibitory postsynaptic potentials.

Chapter 12: The Central Nervous System

Brain and Spinal Cord Anatomy and Function

• Major Brain Regions: Cerebrum (cortex), diencephalon, brainstem (midbrain, pons, medulla), cerebellum.

• Cortical Regions: Motor, sensory, association areas.

• Diencephalon: Thalamus (relay), hypothalamus (homeostasis), epithalamus.

• Brainstem: Midbrain (visual/auditory reflexes), pons (breathing), medulla (vital centers).

• Cerebellum: Coordination, balance.

• Spinal Cord: Horns (gray matter), roots (sensory/motor), rami (branches).

• Funiculi: Columns of white matter (sensory/motor tracts).

• Sensory Pathways: 1st, 2nd, 3rd order neurons transmit sensory info to brain.

• Motor Pathways: Upper (brain to spinal cord) vs. lower (spinal cord to muscle) motor neurons.

Chapter 13: The Peripheral Nervous System

Cranial and Spinal Nerves, Reflexes

• Cranial Nerves: 12 pairs, serve head/neck.

• Spinal Nerves: Formed from dorsal/ventral roots; innervate body regions.

• Nerve Plexuses: Networks (cervical, brachial, lumbar, sacral) serving limbs.

• Sensory Receptors: Detect stimuli (mechanoreceptors, thermoreceptors, etc.).

• Reflex Arc: Pathway for reflexes; includes receptor, sensory neuron, integration center, motor neuron, effector.

• Specific Reflexes: Stretch (knee-jerk), Golgi tendon, flexor (withdrawal), crossed extensor.

Chapter 14: The Autonomic Nervous System and Homeostasis

Divisions and Functions

• Comparison to Somatic: Autonomic controls involuntary effectors (smooth/cardiac muscle, glands); somatic controls voluntary muscles.

• Sympathetic vs. Parasympathetic: Sympathetic ("fight or flight"), parasympathetic ("rest and digest").

• Anatomical Differences: Origin, length of fibers, neurotransmitters used.

• Dual Innervation: Most organs receive input from both divisions.

• Autonomic Tone: Baseline level of activity.

Chapter 15: The Special Senses

Olfaction, Gustation, Vision, Hearing

• Olfaction: Smell; olfactory epithelium, olfactory bulb.

• Gustation: Taste; taste buds, cranial nerves VII, IX, X.

• Vision: Eye anatomy (retina, lens, cornea), photoreceptors (rods/cones).

• Hearing: Ear anatomy (cochlea, auditory ossicles), hair cells.

Chapter 16: The Endocrine System

Hormones and Regulation

• Functions: Regulation of growth, metabolism, reproduction.

• Hormone Types: Amino acid-based (water-soluble), steroid (lipid-soluble).

• Transport/Mechanism: Water-soluble hormones act via membrane receptors; lipid-soluble via intracellular receptors.

• Major Hormones:

  • Antidiuretic hormone (ADH): Water retention.

  • Growth hormone (GH): Growth, metabolism.

  • Thyroid hormones (T3/T4): Metabolic rate.

  • Aldosterone: Sodium retention.

  • Cortisol: Stress response.

  • Epinephrine/Norepinephrine: Sympathetic response.

  • Erythropoietin: Red blood cell production.

  • Renin-angiotensin system: Blood pressure regulation.

  • Natriuretic peptides: Lower blood pressure.

Additional info:

This study guide covers the foundational chapters of a typical Anatomy and Physiology course, focusing on the structure and function of the human body, major physiological processes, and the integration of organ systems. For exam preparation, students should also review diagrams, practice labeling structures, and understand physiological mechanisms in detail.