Chapter 1: Introduction to Anatomy and Physiology

Overview

Anatomy and Physiology are foundational sciences for understanding the human body. Anatomy focuses on the structure, while physiology examines function. The body is organized into hierarchical levels, and homeostasis is a central concept.

• Anatomy: Study of body structure.

• Physiology: Study of body function.

• Homeostasis: Maintenance of a stable internal environment.

Key Terms

• Negative feedback: Reverses a change to maintain stability (e.g., body temperature regulation).

• Positive feedback: Amplifies a change (e.g., childbirth contractions).

Detailed Notes

• Levels of Organization: Chemical → Cellular → Tissue → Organ → Organ System → Organism.

• Chemical Level: Atoms and molecules are the smallest building blocks. Examples: H2O, O2, glucose, amino acids.

• Cellular Level: Cells are the basic unit of life. Examples: Muscle cell (myocyte), nerve cell (neuron), skin cell (keratinocyte).

• Tissue Level: Groups of similar cells working together. Examples: Epithelial, muscle, nervous, connective tissues.

• Organ Level: Organs are made of different tissues. Examples: Heart, stomach, lungs, skin, brain.

• Organ System Level: Organs work together for a common purpose. Examples: Digestive, nervous, integumentary systems.

• Organism Level: All organ systems working together (e.g., a human).

Homeostasis Pathway

• Receptor (sensor): Detects change.

• Control center: Processes information.

• Effector: Carries out response.

Exam Tips

• Define and differentiate anatomy vs physiology.

• Expect feedback loop examples.

• Know levels of organization in order.

Chapter 2: Chemical Level of Organization

Overview

Chemistry underlies all biological processes. Atoms combine to form molecules, which participate in reactions essential for life. Water and pH balance are crucial for homeostasis.

Key Terms

• Atom: Smallest unit of matter.

• Ion: Charged atom.

• Cation: Positive ion; Anion: Negative ion.

• Covalent bond: Shared electrons.

• Hydrogen bond: Weak attraction, important for DNA/protein shape.

• ATP: Cell's energy currency.

• pH scale: Measure of H+ concentration.

Detailed Notes

• Important elements: O, C, H, N (96% of body).

• Ionic bonds: NaCl, strong but dissolve in water.

• Covalent bonds: Polar (H2O), nonpolar (O2).

• Hydrogen bonds: Many together are strong (DNA double helix).

• Water properties: High heat capacity, solvent, cushioning.

• pH balance & buffers: Acids release H+, bases absorb H+. Buffers (e.g., bicarbonate in blood) prevent drastic pH swings.

• Organic molecules: Carbohydrates (energy), lipids (storage, membranes), proteins (structure, defense), nucleic acids (DNA/RNA), ATP (energy).

Key Equations

Exam Tips

• Know bond types (ionic, covalent, hydrogen).

• Match macromolecule to function.

• pH < 7 = acidic; > 7 = basic.

Chapter 3: The Cell

Overview

Cells are the basic unit of life. The plasma membrane controls entry and exit, and organelles perform specialized functions.

Key Terms

• Plasma membrane: Barrier, selective transport.

• Cytosol: Fluid inside the cell.

• Organelle: Specialized cell part.

• Diffusion: Passive movement down a gradient.

• Osmosis: Water diffusion.

• Tonicity: Effect of solution on cell (iso-, hypo-, hyper-).

• Active transport: Uses ATP to move against gradients.

Detailed Notes

• Plasma membrane: Phospholipid bilayer (hydrophilic heads, hydrophobic tails).

• Organelles:

  • Nucleus: DNA, control.

  • RER: Protein synthesis.

  • Golgi: Shipping center.

  • Mitochondria: ATP production.

  • Lysosomes: Digestion.

  • Ribosomes: Protein synthesis.

  • Centrioles: Cell division.

• Transport types:

  • Simple diffusion: Small, nonpolar.

  • Facilitated: Large/charged with protein.

  • Osmosis: Water movement.

  • Active transport: ATP-driven pumps (Na+/K+ pump).

  • Vesicular transport: Bulk movement (endo/exocytosis).

Exam Tips

• Memorize organelles & functions.

• Identify types of transport.

• Tonicity questions (cell swelling/shrinking).

Chapter 4: Histology

Overview

Histology is the study of tissues. There are four major types: epithelial, connective, muscle, and nervous.

Key Terms

• Histology: Study of tissues.

• Epithelial tissue: Covers, lines, secretes.

• Connective tissue: Support, transport, protect.

• Muscle tissue: Movement.

• Nervous tissue: Transmits signals.

• ECM: Ground substance + protein fibers.

Detailed Notes

• Epithelial tissue: Avascular, cellular, polarity, basement membrane.

• Glands:

  • Endocrine: Hormones to blood.

  • Exocrine: Secretions via ducts.

  • Merocrine (exocytosis), Holocrine (rupture), Apocrine (apical loss).

• Connective tissue: Binding, support, transport, storage. Fibers: Collagen (strength), elastic (stretch), reticular (support network).

• Muscle tissue:

  • Skeletal (voluntary, striated).

  • Cardiac (involuntary, striated, intercalated discs).

  • Smooth (involuntary, non-striated).

• Nervous tissue:

  • Neurons: Send signals.

  • Neuroglia: Support neurons.

• Membranes:

  • Mucous: Open passageways.

  • Serous: Cavities (pleura, peritoneum).

  • Cutaneous: Skin.

  • Synovial: Joints.

Table: Four Tissue Types and Functions

Exam Tips

• Match tissue type to function.

• Know gland types & secretion methods.

• Review membrane types.

Chapter 5: The Integumentary System

Overview

The skin is the body's largest organ, providing protection, sensation, temperature regulation, and excretion. It consists of layers, pigments, glands, and has a protective role.

Key Terms

• Epidermis: Outer layer, keratinized.

• Dermis: Connective tissue layer beneath.

• Hypodermis: Anchors skin, stores fat.

• Keratinocyte: Main epidermis cell.

• Melanin: Pigment for UV protection.

• Cyanosis: Bluish skin due to low oxygen.

Detailed Notes

• Skin structure:

  • Epidermis: Stratified squamous, avascular.

  • Dermis: Papillary (loose CT), reticular (dense, irregular CT).

  • Hypodermis: Anchors to muscle/bone.

• Functions: Protection, sensation, temperature regulation, excretion, Vitamin D synthesis.

• Epidermis layers:

  • Stratum basale (stem cells, mitosis).

  • Stratum spinosum.

  • Stratum granulosum (keratin + lipids).

  • Stratum lucidum (thick skin only).

  • Stratum corneum (dead cells, protection).

• Pigments:

  • Melanin: Brown, UV shield.

  • Carotene: Orange, Vitamin A.

  • Hemoglobin: Pink hue.

• Glands:

  • Eccrine sweat: Watery, cooling.

  • Apocrine sweat: Odor, puberty.

  • Mammary: Milk.

  • Sebaceous: Sebum (oil).

• Skin cancers:

  • Basal cell carcinoma: Least dangerous.

  • Squamous cell carcinoma: Can spread.

  • Melanoma: Most dangerous, affects melanocytes.

Exam Tips

• Know the layers of the epidermis in order.

• Memorize glands & functions.

• Expect questions on skin cancer types.

Additional info:

• Some content inferred for completeness, such as examples and expanded definitions.

• Tables and diagrams referenced in notes should be practiced separately for mastery.