$$MAP = (2 \times DBP + SBP) \div 3$$

Question 1

Which of the following best describes the function of muscular arteries in the circulatory system?

Accepted Answer

They distribute blood to various body regions and help regulate blood pressure via vasoconstriction and vasodilation.

Question 2

A patient presents with edema in the lower extremities. Which of the following mechanisms is most likely responsible for this condition?

Accepted Answer

Decreased plasma protein concentration leading to reduced capillary colloid osmotic pressure.

Question 3

Which equation correctly represents the calculation of mean arterial pressure (MAP)?

Accepted Answer

$$MAP = (2 	imes DBP + SBP) \div 3$$

Question 4

Which of the following is a primary function of lymph nodes?

Accepted Answer

Filtration of lymph and activation of immune responses.

Question 5

A patient is exposed to a bacterial pathogen for the first time. Which immune response is primarily activated?

Accepted Answer

Innate immunity involving neutrophils and macrophages.

Question 6

Which of the following best describes the role of helper T cells in the immune system?

Accepted Answer

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

Question 7

Which of the following is a correct description of the inflammatory response?

Accepted Answer

It involves vasodilation, increased capillary permeability, and migration of leukocytes to the site of injury.

Question 8

Which of the following equations represents the conversion of carbon dioxide in the blood?

Accepted Answer

$$CO_2 + H_2O$$ \rightarrow H_2CO_3 \rightarrow $$HCO_3^- + H$$^+$$

Question 9

A patient with chronic obstructive pulmonary disease (COPD) is likely to have which of the following changes in their blood gases?

Accepted Answer

Increased $$CO_2$$ and decreased $$O_2.$$

Question 10

Which of the following best explains why alveolar ventilation is critical for effective gas exchange?

Accepted Answer

It maintains adequate oxygen and carbon dioxide gradients between alveoli and blood.

Question 11

Which of the following is a correct statement about Boyle's Law as it applies to pulmonary ventilation?

Accepted Answer

As the volume of the thoracic cavity increases, the pressure inside the lungs decreases.

Question 12

Which of the following is the most accurate description of adaptive immunity?

Accepted Answer

It is specific, involves memory, and provides a stronger response upon re-exposure to the same antigen.

Question 13

A patient receives a vaccine for influenza. Which type of immunity is primarily being stimulated?

Accepted Answer

Active artificial immunity.

Question 14

Which of the following is a function of the spleen in the lymphatic system?

Accepted Answer

Filtration of blood and removal of old red blood cells.

Question 15

Which hormone is most responsible for increasing blood pressure by promoting sodium and water retention?

Accepted Answer

Aldosterone.

Question 16

A patient is experiencing anaphylactic shock. Which immune mechanism is primarily responsible for this reaction?

Accepted Answer

Massive release of histamine from mast cells due to IgE-mediated hypersensitivity.

Question 17

Which of the following best describes the role of surfactant in the lungs?

Accepted Answer

It decreases the surface tension of alveoli, preventing collapse and facilitating gas exchange.

Question 18

Which of the following is a correct description of the Bohr effect?

Accepted Answer

Increased $$CO_2$$ and decreased pH promote oxygen release from hemoglobin.

Question 19

Which of the following is the most likely consequence of left-sided heart failure?

Accepted Answer

Pulmonary congestion and edema due to increased pressure in pulmonary circulation.

Anatomy & Physiology Study Notes: Cardiovascular, Lymphatic, Immune, and Respiratory Systems

Study Guide - Practice Questions