Comprehensive Study Guide: Anatomy & Physiology Exam Review Questions

Introduction to Anatomy & Physiology

Overview and Subdivisions

Anatomy and physiology are foundational sciences in understanding the structure and function of the human body. Anatomy focuses on the physical structures, while physiology examines how these structures operate and interact.

• Anatomy is subdivided into gross anatomy (structures visible to the naked eye), microscopic anatomy (cells and tissues), and developmental anatomy (changes throughout life).

• Physiology is often divided by organ systems, such as cardiovascular, respiratory, and nervous system physiology.

• Levels of organization include: atoms, molecules, organelles, cells, tissues, organs, organ systems, and organisms.

Medical Imaging and Equipment

• Common imaging techniques: X-rays, CT scans, MRI, PET scans, sonography (ultrasound).

• Each technique has specific uses and equipment requirements. For example, MRI uses strong magnetic fields and radio waves to visualize soft tissues.

Homeostasis and Feedback Systems

• Homeostasis is the maintenance of a stable internal environment.

• Feedback systems regulate homeostasis:

  • Negative feedback reduces the effect of the stimulus (e.g., body temperature regulation).

  • Positive feedback amplifies the stimulus (e.g., blood clotting).

Chemistry of Life

Atomic Structure and Chemical Bonds

Chemistry underpins all biological processes. Understanding atomic structure and chemical bonds is essential for grasping molecular interactions in physiology.

• Atoms consist of protons, neutrons, and electrons.

• Atomic number is the number of protons; mass number is protons plus neutrons.

• Isotopes are atoms of the same element with different numbers of neutrons.

• Radioactive isotopes emit radiation and are used in medical imaging and treatments.

• Chemical bonds include ionic, covalent, and hydrogen bonds.

Biomolecules and Chemical Reactions

• Organic molecules contain carbon and include carbohydrates, lipids, proteins, and nucleic acids.

• Enzymes are biological catalysts that speed up chemical reactions by lowering activation energy.

• Hydrolysis and condensation reactions are important in the synthesis and breakdown of biomolecules.

Acids, Bases, and pH

• Acids release hydrogen ions ($H^+$); bases accept them.

• pH scale measures hydrogen ion concentration: $pH = -\log[H^+]$

• Buffers help maintain stable pH in biological systems.

Cells

Cell Structure and Function

Cells are the basic units of life, with specialized structures (organelles) that perform distinct functions.

• Plasma membrane controls movement of substances in and out of the cell.

• Nucleus contains genetic material (DNA).

• Endoplasmic reticulum (ER) synthesizes proteins and lipids; Golgi apparatus modifies and packages them.

• Mitochondria are the site of cellular respiration and energy (ATP) production.

Transport Across Membranes

• Passive transport (diffusion, osmosis) does not require energy.

• Active transport requires energy (ATP) to move substances against their concentration gradient.

• Endocytosis and exocytosis are processes for bulk transport of materials.

Cellular Respiration

• Cellular respiration converts glucose and oxygen into ATP, carbon dioxide, and water.

• Equation: $C_6H_{12}O_6 + 6O_2 \rightarrow 6CO_2 + 6H_2O + ATP$

Protein Synthesis & Cell Division

DNA, RNA, and Protein Synthesis

Genetic information is stored in DNA and used to synthesize proteins through transcription and translation.

• Transcription: DNA is copied into messenger RNA (mRNA).

• Translation: mRNA is used to assemble amino acids into proteins at ribosomes.

• Gene expression is regulated at multiple levels.

Cell Division

• Mitosis produces two identical daughter cells for growth and repair.

• Meiosis produces gametes (sperm and egg) with half the number of chromosomes.

• Phases of mitosis: prophase, metaphase, anaphase, telophase.

Integumentary System

Structure and Function of Skin

The integumentary system includes the skin, hair, nails, and associated glands. It protects the body and regulates temperature.

• Epidermis is the outer layer; dermis is beneath and contains blood vessels, nerves, and glands.

• Subcutaneous tissue (hypodermis) lies below the dermis and contains fat.

• Functions of skin: protection, sensation, temperature regulation, vitamin D synthesis.

Skin Appendages and Healing

• Hair and nails are derived from epidermal cells.

• Glands include sweat glands (eccrine and apocrine) and sebaceous glands (produce oil).

• Skin heals through inflammation, proliferation, and remodeling phases.

• Types of burns: first-degree (superficial), second-degree (partial thickness), third-degree (full thickness).

Pigmentation and Skin Disorders

• Melanin is the pigment responsible for skin color, produced by melanocytes.

• Common skin disorders: acne, psoriasis, eczema, skin cancer.

• Types of skin cancer: basal cell carcinoma, squamous cell carcinoma, melanoma.

HTML Table: Comparison of Cell Transport Mechanisms

Transport Type	Energy Required?	Direction	Example
Simple Diffusion	No	High to Low	Oxygen moving into cells
Facilitated Diffusion	No	High to Low	Glucose transport via carrier proteins
Osmosis	No	High to Low (water)	Water movement across membranes
Active Transport	Yes (ATP)	Low to High	Sodium-potassium pump
Endocytosis/Exocytosis	Yes (ATP)	Bulk transport	Phagocytosis, neurotransmitter release

Additional info:

• Some questions reference advanced topics (e.g., gene engineering, PCR) that may require further reading.

• Students should consult lecture notes and textbooks for detailed mechanisms and clinical applications.