Physiology Lab Exam #1 Study Guide: Key Concepts in Anatomy & Physiology

Introduction to Anatomy & Physiology

Overview of Human Anatomy and Physiology

Anatomy is the study of the structure of body parts and their relationships to one another, while physiology is the study of the function of the body and its parts. Understanding both is essential for comprehending how the human body operates as an integrated whole.

• Definition of Anatomy: The science of body structures and the relationships among them.

• Definition of Physiology: The science of body functions—how the body parts work and carry out their life-sustaining activities.

• Example: The heart (anatomy) pumps blood (physiology) through the circulatory system.

Body Organization and Terminology

Levels of Organization

The human body is organized into several levels, from the simplest to the most complex:

• Atoms & Molecules

• Cells

• Tissues

• Organs

• Organ Systems

• Organism

Body Regions: Anatomical terminology is used to describe locations and regions of the body, such as anterior/posterior, superior/inferior, and proximal/distal.

Cell Chemistry & Cell Components

Cell Anatomy

Cells are the basic structural and functional units of life. Each cell contains various organelles that perform specific functions.

• Parts of the Cell: Nucleus, cytoplasm, plasma membrane, mitochondria, endoplasmic reticulum, Golgi apparatus, lysosomes, etc.

• Function: Each organelle has a unique role, such as energy production (mitochondria) or protein synthesis (ribosomes).

Energy & Cell Processes

Types of Cell Transport

Cells transport substances across their membranes using various mechanisms:

• Passive Transport: Movement of substances without energy input (e.g., diffusion, osmosis).

• Active Transport: Movement of substances against a concentration gradient, requiring energy (ATP).

• Primary vs. Secondary Active Transport: Primary uses ATP directly; secondary uses the energy from the movement of another substance.

Equation for Diffusion Rate (Fick's Law):

$J = -D \frac{dC}{dx}$

Where J is the flux, D is the diffusion coefficient, and \frac{dC}{dx} is the concentration gradient.

Tissues & Histology

Classification and Types of Tissues

Tissues are groups of similar cells that perform a common function. There are four basic types:

• Epithelial Tissue: Covers body surfaces and lines cavities.

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

• Muscle Tissue: Responsible for movement (skeletal, cardiac, smooth).

• Nervous Tissue: Initiates and transmits electrical impulses.

Function and Importance: Each tissue type has specialized functions essential for body homeostasis.

Integumentary System

Overview

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

Bones & Skeletal Tissue

Overview of the Skeleton

The skeleton is divided into the axial and appendicular skeletons. Bones provide structure, protect organs, and facilitate movement.

• Axial Skeleton: Skull, vertebral column, rib cage.

• Appendicular Skeleton: Limbs and girdles.

• Cartilage: Provides flexibility and cushioning in joints.

• Bone Markings: Features on bones where muscles, tendons, and ligaments attach.

Example: The femur is part of the appendicular skeleton and supports body weight during movement.

Joints

Articulations and Body Movements

Joints, or articulations, are connections between bones that allow for movement and flexibility.

• Classification: Fibrous, cartilaginous, and synovial joints.

• Function: Joints enable a wide range of movements, from simple flexion and extension to complex rotational actions.

Example: The knee is a synovial joint that allows for flexion and extension of the leg.

Illustrations to Know

Recommended Diagrams for Study

• Planes of the Body

• Human Body Regions

• Cell Anatomy

• Types of Tissues

• Types of Joints

• Axial and Appendicular Skeleton

Additional info: Students should be able to label and identify these structures on diagrams for exam purposes.