BIO 144: Anatomy & Physiology I - Chapter Learning Objectives Study Guide

Introduction to Anatomy & Physiology

Fields and Organization of Human Biology

This chapter introduces the foundational concepts of anatomy and physiology, including the organization of the human body and the major fields of study.

• Anatomy: The study of the structure of body parts and their relationships.

• Physiology: The study of the function of body parts and systems.

• Levels of Organization: Chemical, cellular, tissue, organ, organ system, organism.

• Directional Terminology: Terms such as anterior, posterior, superior, inferior, medial, lateral, proximal, distal.

• Body Cavities: Dorsal (cranial, vertebral) and ventral (thoracic, abdominopelvic) cavities.

• Homeostasis: The maintenance of a stable internal environment.

Example: The heart is located in the thoracic cavity, medial to the lungs.

Cell Chemistry & Cell Components

Chemical Bonds and Cell Structure

This chapter covers the chemical basis of life, including atomic structure, chemical bonds, and the organization of cells.

• Atoms and Molecules: Basic units of matter; molecules are combinations of atoms.

• Chemical Bonds: Ionic, covalent, and hydrogen bonds.

• pH and Buffers: pH measures hydrogen ion concentration; buffers stabilize pH.

• Macromolecules: Carbohydrates, lipids, proteins, nucleic acids.

• Cell Organelles: Nucleus, mitochondria, endoplasmic reticulum, Golgi apparatus, lysosomes.

Example: Proteins are made of amino acids linked by peptide bonds.

Energy & Cell Processes

Metabolism and Cellular Energy

This chapter explores how cells obtain and use energy, including metabolic pathways and cellular respiration.

• ATP (Adenosine Triphosphate): The primary energy carrier in cells.

• Enzymes: Biological catalysts that speed up chemical reactions.

• Cellular Respiration: The process by which cells produce ATP from glucose.

• Photosynthesis: Occurs in plant cells, converting light energy to chemical energy.

• Cell Cycle: Interphase (G1, S, G2) and M phase (mitosis: prophase, metaphase, anaphase, telophase).

Equation:

$\text{C}_6\text{H}_{12}\text{O}_6 + 6\text{O}_2 \rightarrow 6\text{CO}_2 + 6\text{H}_2\text{O} + \text{ATP}$

Tissues & Histology

Major Tissue Types

This chapter describes the four major tissue types and their functions.

• Epithelial Tissue: Covers body surfaces and lines cavities.

• Connective Tissue: Supports, protects, and binds other tissues.

• Muscle Tissue: Responsible for movement; includes skeletal, cardiac, and smooth muscle.

• Nervous Tissue: Transmits electrical impulses; includes neurons and neuroglia.

Example: Adipose tissue is a type of connective tissue that stores fat.

Integumentary System

Structure and Function of Skin

This chapter covers the layers of the skin and its accessory structures.

• Epidermis: Outermost layer; provides protection.

• Dermis: Middle layer; contains blood vessels, nerves, and glands.

• Hypodermis: Subcutaneous layer; stores fat.

• Accessory Structures: Hair, nails, sweat glands, sebaceous glands.

Example: Sweat glands help regulate body temperature.

Bones & Skeletal Tissue

Bone Structure and Classification

This chapter introduces the structure, function, and classification of bones.

• Bone Tissue: Compact and spongy bone.

• Bone Shapes: Long, short, flat, irregular.

• Bone Functions: Support, protection, movement, mineral storage, blood cell formation.

• Axial vs. Appendicular Skeleton: Axial includes skull, vertebral column, rib cage; appendicular includes limbs and girdles.

Example: The femur is a long bone in the appendicular skeleton.

Joints

Classification and Movement

This chapter describes the types of joints and their movements.

• Fibrous Joints: Immovable; e.g., sutures in the skull.

• Cartilaginous Joints: Slightly movable; e.g., intervertebral discs.

• Synovial Joints: Freely movable; e.g., knee, shoulder.

• Movements: Flexion, extension, abduction, adduction, rotation.

Example: The elbow is a hinge synovial joint allowing flexion and extension.

Muscle Tissue & Muscles

Muscle Structure and Function

This chapter covers the organization, contraction, and major types of muscle tissue.

• Skeletal Muscle: Voluntary movement; striated.

• Cardiac Muscle: Involuntary; found in the heart; striated.

• Smooth Muscle: Involuntary; found in walls of organs; non-striated.

• Muscle Contraction: Involves actin and myosin filaments; ATP required.

• Neuromuscular Junction: Site where nerve stimulates muscle fiber.

Equation:

$\text{Muscle Contraction:} \quad \text{ATP} + \text{Myosin} \rightarrow \text{Actin-Myosin Crossbridge Formation}$

Nervous Tissue and Nervous System

Organization and Function

This chapter introduces the structure and function of the nervous system.

• Central Nervous System (CNS): Brain and spinal cord.

• Peripheral Nervous System (PNS): Nerves outside the CNS.

• Neurons: Conduct electrical impulses; consist of cell body, axon, dendrites.

• Neuroglia: Support and protect neurons.

• Synapse: Junction between neurons for signal transmission.

Example: Sensory neurons transmit signals from receptors to the CNS.

The Central Nervous System

Brain and Spinal Cord Structure

This chapter details the components and functions of the brain and spinal cord.

• Brain Regions: Cerebrum, cerebellum, brainstem.

• Spinal Cord: Transmits signals between brain and body; contains ascending and descending tracts.

• Cranial Nerves: Twelve pairs; control head and neck functions.

Example: The cerebellum coordinates movement and balance.

The Peripheral Nervous System

Nerve Structure and Function

This chapter covers the organization and function of peripheral nerves.

• Somatic Nervous System: Controls voluntary movements.

• Autonomic Nervous System: Regulates involuntary functions (sympathetic and parasympathetic divisions).

• Reflex Arcs: Automatic responses to stimuli.

Example: The patellar reflex is a somatic reflex arc.

The Special Senses

Sensory Receptors and Pathways

This chapter describes the major senses and their pathways.

• Vision: Photoreceptors in the retina detect light.

• Hearing: Hair cells in the cochlea detect sound vibrations.

• Taste: Taste buds detect chemicals in food.

• Smell: Olfactory receptors detect airborne chemicals.

• Equilibrium: Inner ear structures detect head position and movement.

Example: Rods and cones are photoreceptors responsible for vision in dim and bright light, respectively.

Additional info:

This study guide is based on the learning objectives outlined for each chapter in a college-level Anatomy & Physiology I course. It provides a structured overview of the major topics, definitions, and examples relevant for exam preparation.