Exam 1 Review: Cells, Tissues, and Integumentary System

Exam 1 Format and Structure

Overview of Exam Structure

This section outlines the format and content emphasis for Exam 1 in Anatomy & Physiology. The exam covers foundational topics from the first lectures, focusing on cells, tissues, and the integumentary system.

• Total Questions: Approximately 24 questions.

• Question Types: Multiple choice, matching, labeling, and short answer questions.

• Short Answer: About 25% of the exam consists of short answer questions (1-2 sentences), often requiring explanation, calculation, or reasoning.

• Emphasis: Questions are based on annotated slides and lecture videos, with a focus on understanding 'what', 'why', and 'how' for each topic.

Major Exam Topics

L2: Cells

The cell is the basic structural and functional unit of life. This topic covers cell anatomy, organization, membrane transport mechanisms, and cancer biology.

• Cell Anatomy and Organization: Study of cell structures such as the nucleus, mitochondria, endoplasmic reticulum, and their roles in cellular function.

• Cell Membrane Transport: Mechanisms by which substances move across the cell membrane, including diffusion, osmosis, active transport, and facilitated diffusion.

• Cancer: Uncontrolled cell division resulting from mutations in genes regulating the cell cycle. Cancer cells often evade normal regulatory mechanisms.

• Feedback Mechanisms: Processes that maintain homeostasis, such as negative and positive feedback loops.

• Key Terms: Definitions of terms like homeostasis, apoptosis, mitosis, and oncogene.

Example: The sodium-potassium pump is an example of active transport, maintaining cellular ion balance.

L4: Tissues

Tissues are groups of cells with similar structure and function. This topic explores tissue anatomy, specialized epithelia, physical barriers, and responses to injury and inflammation.

• Tissue Anatomy: Four basic tissue types: epithelial, connective, muscle, and nervous tissue.

• Specialized Epithelia: Epithelial tissues adapted for specific functions, such as absorption (intestinal lining) or protection (skin).

• Physical Barriers: Structures that protect the body from pathogens, such as the skin and mucous membranes.

• Injury and Inflammation: The body's response to damage, involving processes like vasodilation, increased permeability, and immune cell recruitment.

• Chemical Compounds in Life: Essential molecules such as proteins, lipids, carbohydrates, and nucleic acids.

Example: Inflammation is characterized by redness, heat, swelling, and pain due to increased blood flow and immune activity.

L5: Integumentary System

The integumentary system includes the skin, hair, and nails, serving as the body's primary barrier and playing roles in protection, sensation, and thermoregulation.

• Anatomy of Skin, Hair, and Nails: Layers of the skin (epidermis, dermis, hypodermis), hair follicles, and nail structure.

• Physiological Functions: Protection against pathogens, regulation of body temperature, synthesis of vitamin D, and sensory reception.

• Repair and Aging: Processes of wound healing and changes in skin structure/function with age.

Example: The epidermis provides a waterproof barrier, while sweat glands in the dermis help regulate temperature.

Key Study Strategies

• Review annotated lecture slides and videos for detailed explanations.

• Focus on understanding mechanisms ('how') and reasons ('why') behind physiological processes.

• Practice labeling diagrams and matching terms to definitions.

• Prepare to answer calculation-based questions related to cell transport or physiological functions.

Sample Table: Tissue Types and Functions

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

Key Equations and Concepts

• Osmosis: Movement of water across a semipermeable membrane from low solute concentration to high solute concentration.

• Diffusion Rate:

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

• Cell Membrane Potential:

$V_m = \frac{RT}{F} \ln \left( \frac{[K^+]_{out}}{[K^+]_{in}} \right)$

Additional info: Equations and table added for academic completeness and exam preparation.