BIOL 2401 Anatomy & Physiology I: Study Guide for Chapters 1-3

Notes Practice Video lessons

Study Guide - Smart Notes

Tailored notes based on your materials, expanded with key definitions, examples, and context.

Chapter 1: An Introduction to Anatomy & Physiology

Definition of Anatomy and Physiology

Anatomy: The study of the structure of body parts and their relationships to one another.
Physiology: The study of the function of body parts; how they work to carry out life-sustaining activities.
Example: Studying the heart's chambers (anatomy) and how blood flows through them (physiology).

Types of Anatomical Studies

Gross Anatomy: Study of large, visible structures (e.g., organs).
Surface Anatomy: Study of external features and landmarks.
Regional Anatomy: Study of specific areas of the body.
Microscopic Anatomy: Study of structures too small to be seen with the naked eye (includes cytology and histology).

Levels of Organization

Chemical Level: Atoms and molecules.
Cellular Level: Cells and their organelles.
Tissue Level: Groups of similar cells.
Organ Level: Contains two or more types of tissues.
Organ System Level: Organs that work closely together.
Organismal Level: All organ systems combined to make the whole organism.

Medical Terms for Study Areas

Cytology: Study of cells.
Histology: Study of tissues.
Pathology: Study of disease.
Embryology: Study of embryos and their development.

Organ Systems Overview

Major Organ Systems: Integumentary, Skeletal, Muscular, Nervous, Endocrine, Cardiovascular, Lymphatic, Respiratory, Digestive, Urinary, Reproductive.
Function: Each system has specific roles, such as protection, movement, control, transport, and reproduction.

Homeostasis and Control Mechanisms

Homeostasis: Maintenance of a stable internal environment.
Mechanisms: Receptor (detects change), Control Center (processes information), Effector (responds to change).
Example: Regulation of body temperature.

Body Regions, Cavities, Quadrants, and Planes

Regions: Specific areas such as abdominal, thoracic, pelvic.
Body Cavities: Dorsal (cranial, vertebral), Ventral (thoracic, abdominopelvic).
Quadrants: Right upper, left upper, right lower, left lower (used in abdominal assessment).
Planes: Sagittal (left/right), Frontal (anterior/posterior), Transverse (superior/inferior).
Directional Terms: Superior, inferior, anterior, posterior, medial, lateral, proximal, distal.

Chapter 2: Chemical Level of Organization

Atoms and Their Components

Atom: Smallest unit of matter, composed of protons (+), neutrons (0), and electrons (-).
Protons: Positive charge, found in nucleus.
Neutrons: No charge, found in nucleus.
Electrons: Negative charge, orbit nucleus.

Principal Elements of the Human Body

Most Abundant Elements: Oxygen (O), Carbon (C), Hydrogen (H), Nitrogen (N), Calcium (Ca), Phosphorus (P).
Function: These elements are essential for building biomolecules and cellular processes.

Energy Levels and Bond Formation

Energy Levels: Electrons occupy energy levels (shells) around the nucleus.
Importance: The arrangement of electrons determines how atoms interact and form bonds.

Ionic and Covalent Bonds

Ionic Bonds: Formed when electrons are transferred from one atom to another, creating ions.
Covalent Bonds: Formed when atoms share electrons.
Difference: Ionic bonds involve charged particles; covalent bonds involve shared electrons.
Example: NaCl (ionic), H2O (covalent).

Ions and Electron Transfer

Ion: An atom or molecule with a net electric charge due to loss or gain of electrons.
Cation: Positive ion (loss of electrons).
Anion: Negative ion (gain of electrons).

States of Matter

Solid: Definite shape and volume.
Liquid: Definite volume, no definite shape.
Gas: No definite shape or volume.

Elements, Solutions, Compounds

Element: Pure substance made of one type of atom.
Compound: Substance formed from two or more elements chemically bonded.
Solution: Homogeneous mixture of two or more substances.

Organic vs. Inorganic Compounds

Organic Compounds: Contain carbon and hydrogen; examples include carbohydrates, lipids, proteins, nucleic acids.
Inorganic Compounds: Do not contain both carbon and hydrogen; examples include water, salts, acids, bases.

pH Scale: Acids, Bases, Neutral

pH: Measure of hydrogen ion concentration.
Acidic: pH < 7
Neutral: pH = 7
Basic (Alkaline): pH > 7
Equation:

Organic Compounds: Lipids, Carbohydrates, Proteins, Nucleic Acids

Carbohydrates: Main source of energy; composed of monosaccharides.
Lipids: Energy storage, insulation; composed of fatty acids and glycerol.
Proteins: Structure, enzymes, transport; composed of amino acids.
Nucleic Acids: Genetic information; composed of nucleotides (DNA, RNA).
Importance: Each type is essential for cellular structure and function.

Chapter 3: Cellular Level of Organization

Cellular Differentiation

Definition: Process by which cells become specialized in structure and function.
Result: Formation of different cell types and tissues.

Plasma Membrane: Components and Function

Components: Phospholipid bilayer, proteins, cholesterol, carbohydrates.
Function: Controls movement of substances in and out of the cell; provides protection and communication.

Cell Organelles: Names and Functions

Nucleus: Contains genetic material (DNA); controls cell activities.
Mitochondria: Site of ATP production; "powerhouse" of the cell.
Ribosomes: Protein synthesis.
Endoplasmic Reticulum (ER): Rough ER (protein synthesis), Smooth ER (lipid synthesis).
Golgi Apparatus: Modifies, sorts, and packages proteins and lipids.
Lysosomes: Digestion and waste removal.
Peroxisomes: Breakdown of fatty acids and detoxification.
Cytoskeleton: Structural support, movement.

The Nucleus: Composition and Function

Composition: Nuclear envelope, nucleolus, chromatin.
Function: Stores DNA, coordinates cell activities (growth, metabolism, reproduction).

Mitochondria and Inner Processes

Function: Produces ATP via cellular respiration.
Inner Processes: Krebs cycle, electron transport chain.
Equation:

Protein Synthesis: Summary of Steps

Transcription: DNA is copied into mRNA in the nucleus.
Translation: mRNA is decoded by ribosomes to build a protein.

Transport Processes: Diffusion, Passive vs. Active

Diffusion: Movement of molecules from high to low concentration.
Passive Transport: No energy required (diffusion, osmosis, facilitated diffusion).
Active Transport: Requires energy (ATP); moves substances against concentration gradient.

Osmosis: Isotonic, Hypotonic, Hypertonic

Isotonic: Equal solute concentration; no net water movement.
Hypotonic: Lower solute concentration outside; water enters cell.
Hypertonic: Higher solute concentration outside; water leaves cell.

Endocytosis and Exocytosis

Endocytosis: Process by which cells take in substances by engulfing them.
Exocytosis: Process by which cells expel substances using vesicles.

Cell Cycle: Phases and Mitosis

Phases: Interphase (G1, S, G2), Mitosis, Cytokinesis.
Mitosis: Division of nucleus; phases include prophase, metaphase, anaphase, telophase.
Cytokinesis: Division of cytoplasm, resulting in two daughter cells.

Lab Review: Light Microscope and Cell Structure

Parts of the Light Microscope

Eyepiece (Ocular lens): Where you look through to see the specimen.
Objective lenses: Different magnifications.
Stage: Platform for the slide.
Coarse and fine focus knobs: Adjust clarity.
Light source: Illuminates specimen.

Cell Structure and Plasma Membrane

Cell Structure: Includes nucleus, cytoplasm, organelles, plasma membrane.
Plasma Membrane: Selectively permeable barrier; maintains homeostasis.

Term	Definition	Example
Anatomy	Study of body structure	Heart chambers
Physiology	Study of body function	Blood flow
Homeostasis	Stable internal environment	Body temperature regulation
Diffusion	Movement from high to low concentration	Oxygen entering cells
Mitosis	Cell division	Skin cell regeneration

Additional info: Academic context and definitions have been expanded for clarity and completeness. This guide covers all major concepts listed for BIOL 2401 Test 1, including lab review topics.