Anatomy & Physiology Semester 1 Comprehensive Study Guide

Anatomy & Physiology Semester 1 Study Guide

Introduction to Anatomy and Physiology

This section covers the foundational concepts of anatomy and physiology, including definitions, organization levels, and basic principles that guide the study of the human body.

• Anatomy is the study of the structure and shape of the body and its parts, while physiology is the study of how those parts function.

• Levels of organization in the body include: chemical, cellular, tissue, organ, organ system, and organismal levels.

• Homeostasis refers to the body's ability to maintain stable internal conditions despite changes in the external environment.

• Directional terms (e.g., superior, inferior, anterior, posterior) are used to describe the locations of structures relative to other structures or locations in the body.

• Body planes include sagittal, frontal (coronal), and transverse planes, which are used to divide the body for anatomical study.

Basic Chemistry for Anatomy & Physiology

Understanding basic chemistry is essential for grasping physiological processes. This section reviews atomic structure, chemical bonds, and the properties of water and biological molecules.

• Atoms are the smallest units of matter, composed of protons, neutrons, and electrons.

• Ions are atoms that have gained or lost electrons, resulting in a charge.

• Covalent bonds involve the sharing of electrons, while ionic bonds involve the transfer of electrons.

• Water is a polar molecule, essential for life, and acts as a solvent in biological systems.

• pH measures the concentration of hydrogen ions; acids have a pH less than 7, bases have a pH greater than 7.

• Macromolecules include carbohydrates, lipids, proteins, and nucleic acids, each with specific functions in the body.

Cells and Tissues

This section explores the structure and function of cells, the plasma membrane, and the four basic tissue types.

• Cell theory states that all living things are composed of cells, and cells are the basic units of structure and function.

• Plasma membrane is a selectively permeable barrier composed of a phospholipid bilayer with embedded proteins.

• Organelles include the nucleus, mitochondria, endoplasmic reticulum, Golgi apparatus, lysosomes, and others, each with specialized functions.

• Transport mechanisms include diffusion, osmosis, facilitated diffusion, and active transport.

• Tissues are groups of similar cells performing a common function. The four basic types are epithelial, connective, muscle, and nervous tissue.

Skin and Body Membranes

The integumentary system includes the skin and its associated structures, providing protection, sensation, and regulation.

• Skin layers: Epidermis (outermost), dermis (middle), and hypodermis (subcutaneous layer).

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

• Accessory structures include hair, nails, sweat glands, and sebaceous glands.

• Body membranes include cutaneous, mucous, serous, and synovial membranes, each with specific locations and functions.

• Skin color is determined by pigments such as melanin, carotene, and hemoglobin.

• Burns are classified by depth (first, second, third degree) and can lead to complications such as infection and dehydration.

Sample Table: Types of Tissues

Tissue Type	Main Function	Location Example
Epithelial	Protection, absorption, secretion	Skin, lining of GI tract
Connective	Support, binding, protection	Bone, blood, fat
Muscle	Movement	Skeletal muscles, heart
Nervous	Control, communication	Brain, spinal cord, nerves

Key Equations and Concepts

• pH calculation: $pH = -\log_{10}[H^+]$

• Osmosis: Movement of water from an area of lower solute concentration to higher solute concentration across a semipermeable membrane.

• Homeostatic control mechanisms: Involve receptors, control center, and effectors to maintain balance.

Additional Info

• Understanding the structure and function of each organ system is essential for integrating knowledge across topics.

• Be familiar with anatomical terminology for directions, regions, and body cavities.

• Review the classification and characteristics of burns, types of membranes, and the role of each tissue type.