Anatomy & Physiology Semester 1 Final Study Guide: Key Concepts and Review

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Anatomy & Physiology: Semester 1 Final Study Guide

Introduction to Anatomy & Physiology

Anatomy and physiology are foundational sciences for understanding the structure and function of the human body. This section covers basic definitions, organizational levels, and directional terminology.

Anatomy: The study of the structure of body parts and their relationships to one another.
Physiology: The study of the function of body parts and how they work to carry out life-sustaining activities.
Levels of Organization: Chemical, cellular, tissue, organ, organ system, organism.
Directional Terms: Used to describe locations of structures (e.g., superior, inferior, anterior, posterior, medial, lateral).
Body Planes: Sagittal, frontal (coronal), transverse.
Body Cavities: Dorsal (cranial, vertebral), ventral (thoracic, abdominopelvic).

Basic Chemistry for Anatomy & Physiology

Chemistry underpins physiological processes. Understanding atoms, molecules, and chemical reactions is essential.

Atoms: Basic unit of matter, composed of protons, neutrons, electrons.
Molecules: Two or more atoms bonded together.
Types of Chemical Bonds: Ionic, covalent, hydrogen bonds.
Water Properties: High heat capacity, polarity, solvent abilities, reactivity, cushioning.
pH Scale: Measures acidity/alkalinity; .
Macromolecules: Carbohydrates, lipids, proteins, nucleic acids.
Enzymes: Biological catalysts that speed up chemical reactions.

Cells and Tissues

Cells are the basic units of life, and tissues are groups of similar cells performing specific functions.

Cell Structure: Plasma membrane, cytoplasm, nucleus.
Plasma Membrane: Phospholipid bilayer with embedded proteins; regulates entry/exit of substances.
Cell Junctions: Tight junctions, desmosomes, gap junctions.
Organelles: Mitochondria (ATP production), ribosomes (protein synthesis), endoplasmic reticulum, Golgi apparatus, lysosomes.
Tissue Types: Epithelial, connective, muscle, nervous.
Functions of Epithelial Tissue: Protection, absorption, filtration, secretion.
Connective Tissue: Supports, protects, binds other tissues; includes bone, cartilage, blood.
Muscle Tissue: Movement; types include skeletal, cardiac, smooth.
Nervous Tissue: Transmits electrical impulses; neurons and neuroglia.

Skin and Body Membranes

The skin is the largest organ and serves as a protective barrier. Body membranes line cavities and cover surfaces.

Functions of Skin: Protection, temperature regulation, sensation, excretion, vitamin D synthesis.
Layers of Skin: Epidermis (stratified squamous epithelium), dermis (connective tissue), hypodermis (subcutaneous fat).
Cells of Epidermis: Keratinocytes, melanocytes, Langerhans cells, Merkel cells.
Skin Color: Determined by melanin, carotene, hemoglobin.
Skin Appendages: Hair, nails, sweat glands, sebaceous glands.
Types of Membranes: Cutaneous (skin), mucous, serous, synovial.
Burns: Classified by depth (first, second, third degree); severity assessed by rule of nines.

Body Systems Overview

Major organ systems work together to maintain homeostasis and support life.

Skeletal System: Bones, cartilage, ligaments; support, protection, movement, mineral storage, blood cell formation.
Muscular System: Skeletal muscles; movement, posture, heat production.
Nervous System: Brain, spinal cord, nerves; fast control of body activities.
Endocrine System: Glands; slow control via hormones.
Cardiovascular System: Heart, blood vessels; transport of nutrients, gases, wastes.
Lymphatic System: Lymph nodes, vessels; immunity, fluid balance.
Respiratory System: Lungs, airways; gas exchange.
Digestive System: Organs for food breakdown and absorption.
Urinary System: Kidneys, bladder; waste removal, water balance.
Reproductive System: Organs for producing offspring.

Homeostasis

Homeostasis is the maintenance of a stable internal environment despite external changes.

Feedback Mechanisms: Negative feedback (most common, e.g., temperature regulation), positive feedback (e.g., blood clotting).
Components: Receptor, control center, effector.
Example: Regulation of blood glucose by insulin and glucagon.

Table: Major Tissue Types and Their Functions

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

Additional info:

Some questions in the guide refer to specific examples, such as types of burns, layers of the skin, and functions of organelles. These are expanded with academic context for clarity.
For exam preparation, students should be able to define terms, describe processes, and apply concepts to clinical scenarios.