Anatomy & Physiology II Exam Review – Step-by-Step Study Guidance

Q1. Describe the three functions of blood.

Background

Topic: Blood Functions

This question tests your understanding of the major roles blood plays in the human body, which is foundational for understanding the circulatory system.

Key Terms:

• Transport

• Regulation

• Protection

Step-by-Step Guidance

1. Start by listing the three main categories of blood function (think about what blood moves, how it helps maintain homeostasis, and how it defends the body).

2. For each function, provide a brief explanation. For example, under 'transport,' consider what substances are carried by blood.

3. For 'regulation,' think about how blood helps maintain internal balance (such as temperature, pH, and fluid volume).

4. For 'protection,' consider how blood helps defend against disease and prevents blood loss.

Try solving on your own before revealing the answer!

Final Answer:

• Transport: Blood transports oxygen from the lungs to tissues, carbon dioxide from tissues to the lungs, nutrients from the digestive tract, hormones, and metabolic wastes.

• Regulation: Blood helps regulate body temperature, pH, and fluid volume in the body.

• Protection: Blood protects against blood loss through clotting and against infection through immune system components (white blood cells, antibodies, etc.).

These three functions are essential for maintaining homeostasis and supporting life.

Q2. What is anemia? Describe its three causes.

Background

Topic: Blood Disorders – Anemia

This question assesses your understanding of anemia, a common blood disorder, and its underlying causes.

Key Terms:

• Anemia

• Hemoglobin

• Red blood cells (RBCs)

Step-by-Step Guidance

1. Begin by defining anemia in terms of its effect on oxygen-carrying capacity of blood.

2. Recall that anemia can result from problems with red blood cells or hemoglobin.

3. List the three general categories of causes (think about production, destruction, and loss of RBCs).

4. For each cause, provide a brief explanation or example (e.g., decreased production, increased destruction, or blood loss).

Try solving on your own before revealing the answer!

Final Answer:

Anemia is a condition in which the blood's oxygen-carrying capacity is reduced, often due to a deficiency in red blood cells or hemoglobin.

• Blood loss: Acute or chronic bleeding (e.g., trauma, ulcers, menstruation).

• Decreased RBC production: Due to nutritional deficiencies (iron, vitamin B12, folic acid), bone marrow disorders, or chronic diseases.

• Increased RBC destruction: Hemolytic anemias, where RBCs are destroyed faster than they can be produced (e.g., sickle cell disease, autoimmune reactions).

Each cause affects the number or function of RBCs, leading to reduced oxygen delivery to tissues.

Q3. For any ONE of these leukocytes, describe their nucleus/granule staining pattern, duration of development and lifespan, and function: (A) Neutrophils; (B) Eosinophils; (C) Basophils; (D) Lymphocytes; (E) Monocytes

Background

Topic: Leukocyte Structure and Function

This question tests your ability to recall and describe the characteristics and roles of a specific type of white blood cell.

Key Terms:

• Leukocyte

• Nucleus shape

• Granules

• Lifespan

• Function

Step-by-Step Guidance

1. Choose one leukocyte from the list (e.g., neutrophil, eosinophil, etc.).

2. Describe the appearance of its nucleus and how its granules stain (e.g., with acidic or basic dyes).

3. State the typical duration of development (how long it takes to mature) and its average lifespan in the body.

4. Summarize the main function of this leukocyte in the immune system.

Try solving on your own before revealing the answer!

Final Answer (Example: Neutrophil):

• Nucleus/Granule Staining: Neutrophils have a multilobed nucleus and pale lilac granules that do not strongly stain with either acidic or basic dyes.

• Development/Lifespan: Develop in about 14 days; lifespan is 6 hours to a few days.

• Function: Phagocytize bacteria and are the first responders to infection.

Each leukocyte type has unique features and roles in immunity.

Q4. What is hemostasis? Summarize the 3 steps of hemostasis.

Background

Topic: Hemostasis (Blood Clotting)

This question checks your understanding of the process that stops bleeding after blood vessel injury.

Key Terms:

• Hemostasis

• Vascular spasm

• Platelet plug formation

• Coagulation

Step-by-Step Guidance

1. Define hemostasis as a process and its importance in the body.

2. List the three main steps in order.

3. Briefly describe what happens in each step (e.g., what triggers each step, what cells or molecules are involved).

Try solving on your own before revealing the answer!

Final Answer:

Hemostasis is the process that stops bleeding after vessel injury. The three steps are:

1. Vascular spasm: Immediate vasoconstriction of the damaged vessel to reduce blood flow.

2. Platelet plug formation: Platelets adhere to exposed collagen fibers and aggregate to form a temporary plug.

3. Coagulation: Fibrin forms a mesh that stabilizes the platelet plug, resulting in a stable blood clot.

These steps work together to prevent blood loss and initiate vessel repair.

Q5. Summarize the function of the pulmonary circuit pump and the systemic circuit pump in the heart. Describe where oxygen and carbon dioxide are exchanged in these circuits.

Background

Topic: Heart Circuits and Gas Exchange

This question tests your understanding of the two main circuits of blood flow and where gas exchange occurs.

Key Terms:

• Pulmonary circuit

• Systemic circuit

• Gas exchange

Step-by-Step Guidance

1. Identify which side of the heart pumps blood to the pulmonary circuit and which to the systemic circuit.

2. Describe the main function of each circuit (what is delivered or picked up in each).

3. Explain where oxygen and carbon dioxide are exchanged in each circuit (think about lungs vs. tissues).

Try solving on your own before revealing the answer!

Final Answer:

• Pulmonary circuit pump (right side): Pumps deoxygenated blood to the lungs, where carbon dioxide is released and oxygen is picked up.

• Systemic circuit pump (left side): Pumps oxygenated blood to body tissues, where oxygen is delivered and carbon dioxide is picked up for removal.

• Gas exchange: Occurs in the lungs (pulmonary circuit) and in the capillaries of body tissues (systemic circuit).

This separation ensures efficient oxygen delivery and carbon dioxide removal.