Question 1

Which of the following best describes a hormone controlled by a negative feedback mechanism?

Accepted Answer

Insulin release in response to high blood glucose levels

Question 2

A patient has a deficiency in erythropoietin. Which organ is most likely affected, and what is the primary consequence?

Accepted Answer

Kidney; decreased red blood cell production

Question 3

Which hormone is primarily responsible for stimulating the production of erythrocytes, and what is its main target tissue?

Accepted Answer

Erythropoietin; bone marrow

Question 4

Which of the following best explains the role of platelets in hemostasis?

Accepted Answer

They adhere to damaged blood vessels and release chemicals that promote clotting.

Question 5

A patient with a mutation in the gene encoding fibrinogen would most likely experience which of the following?

Accepted Answer

Impaired blood clot formation

Question 6

Which chamber of the heart receives oxygenated blood from the lungs?

Accepted Answer

Left atrium

Question 7

Which of the following best describes the function of heart valves?

Accepted Answer

They prevent the backflow of blood between heart chambers.

Question 8

A patient has a blockage in the left coronary artery. Which area of the heart is most at risk for ischemia?

Accepted Answer

Left ventricle

Question 9

Which of the following equations correctly represents cardiac output?

Accepted Answer

$$CO = HR 	imes SV$$

Question 10

If a person’s blood pressure is measured as 120/80 mmHg, what does the 80 mmHg represent?

Accepted Answer

Diastolic pressure

Question 11

Which of the following best describes the function of lymph nodes?

Accepted Answer

They filter lymph and house immune cells that respond to pathogens.

Question 12

Which of the following is a primary function of the spleen?

Accepted Answer

Removal of old or damaged red blood cells from circulation

Question 13

Which of the following best defines humoral immunity?

Accepted Answer

Immunity mediated by antibodies produced by B cells

Question 14

A patient is exposed to a virus for the first time. Which type of immunity is primarily responsible for the initial response?

Accepted Answer

Innate immunity

Question 15

Which of the following best describes the function of helper T cells in the immune response?

Accepted Answer

They activate B cells and cytotoxic T cells by releasing cytokines.

Question 16

Which of the following is a characteristic of cell-mediated immunity?

Accepted Answer

It involves cytotoxic T cells targeting infected or abnormal cells.

Question 17

A patient receives an organ transplant and develops rejection of the new organ. Which immune cells are primarily responsible for this response?

Accepted Answer

Cytotoxic T cells

Question 18

Which of the following best describes the relationship between stroke volume (SV), heart rate (HR), and cardiac output (CO)?

Accepted Answer

$$CO = HR 	imes SV$$

Question 19

Which of the following would most likely increase blood pressure according to the equation $$BP = CO 	imes TPR ($$where $$TPR is $$total peripheral resistance)?

Accepted Answer

An increase in total peripheral resistance

Question 20

A patient with a genetic defect in the production of antibodies would have a deficiency in which type of immunity?

Accepted Answer

Humoral immunity

Anatomy & Physiology Study Guide: Ch. 9-12

Study Guide - Practice Questions

Study Guide - Flashcards