$$CO = Stroke\ Volume \times Heart\ Rate$$

Question 1

Which of the following best describes the role of antidiuretic hormone (ADH) in the human body?

Accepted Answer

ADH increases water reabsorption in the collecting ducts of the kidneys, reducing urine output.

Question 2

A patient presents with a blood pH of 7.25, elevated CO$$_2$$ levels, and rapid, shallow breathing. Which acid-base disorder is most likely present?

Accepted Answer

Respiratory acidosis

Question 3

Which of the following equations correctly represents cardiac output ($$CO$$)?

Accepted Answer

$$CO = Stroke\ Volume 	imes Heart\ Rate$$

Question 4

Which of the following best explains why a patient with liver failure may experience excessive bleeding?

Accepted Answer

The liver produces most of the clotting factors necessary for hemostasis.

Question 5

A blockage in the pulmonary artery would directly affect which of the following?

Accepted Answer

Blood flow from the right ventricle to the lungs

Question 6

Which of the following best describes the function of surfactant in the alveoli?

Accepted Answer

Surfactant decreases the surface tension of alveolar fluid, preventing collapse.

Question 7

A patient is unable to absorb vitamin B$$_{12}$$ due to a lack of intrinsic factor. Which organ is most likely malfunctioning?

Accepted Answer

Stomach

Question 8

Which of the following is the correct sequence of blood flow through the heart, starting at the right atrium?

Accepted Answer

Right atrium → Right ventricle → Pulmonary artery → Lungs → Pulmonary vein → Left atrium → Left ventricle → Aorta

Question 9

Which of the following best describes the function of aldosterone?

Accepted Answer

Aldosterone increases sodium reabsorption and potassium excretion in the kidneys.

Question 10

A patient with a deficiency in T-helper cells would most likely have impaired function in which system?

Accepted Answer

Lymphatic/immune system

Question 11

Which of the following best explains why a person with chronic kidney disease may develop anemia?

Accepted Answer

The kidneys produce erythropoietin, which stimulates red blood cell production.

Question 12

Which of the following is a correct description of the Frank-Starling law of the heart?

Accepted Answer

The greater the end-diastolic volume, the greater the force of contraction.

Question 13

Which of the following best describes the function of the hepatic portal circulation?

Accepted Answer

It carries nutrient-rich blood from the digestive organs to the liver for processing.

Question 14

Which of the following best explains the effect of parathyroid hormone (PTH) on blood calcium levels?

Accepted Answer

PTH increases blood calcium levels by stimulating osteoclast activity.

Question 15

A patient is experiencing severe dehydration. Which hormone would be most active in conserving water?

Accepted Answer

Antidiuretic hormone (ADH)

Question 16

Which of the following best describes the Bohr effect in hemoglobin?

Accepted Answer

Increased CO$$_2$$ and decreased pH reduce hemoglobin's affinity for O$$_2$$, enhancing oxygen delivery to tissues.

Question 17

Which of the following is the correct formula for calculating mean arterial pressure (MAP)?

Accepted Answer

$$MAP = Diastolic\ Pressure + \frac{1}{3}(Systolic\ Pressure - Diastolic\ Pressure)$$

Question 18

Which of the following best describes the primary function of the nephron loop (loop of Henle) in the kidney?

Accepted Answer

To concentrate urine by creating a gradient of osmolarity in the medulla

Question 19

Which of the following best explains why a person with a blocked thoracic duct may develop edema in the lower limbs?

Accepted Answer

Lymph from the lower limbs cannot return to the venous circulation, causing fluid accumulation.

Question 20

Which of the following best describes the effect of sympathetic nervous system activation on the heart?

Accepted Answer

It increases heart rate and force of contraction.

Anatomy and Physiology I & II: Comprehensive Study Guide (Course Content Outline)

Study Guide - Practice Questions