Question 1

A patient is experiencing muscle weakness due to a defect in the sarcomere. Which of the following best describes the functional unit of a skeletal muscle that is directly responsible for contraction?

Accepted Answer

Sarcomere

Question 2

During an isometric contraction, which of the following best describes what happens to the muscle?

Accepted Answer

The muscle length remains the same while tension increases.

Question 3

A patient is diagnosed with a deficiency in surfactant production. Which of the following best describes the primary function of surfactant in the lungs?

Accepted Answer

It decreases the surface tension in alveoli, preventing collapse.

Question 4

Which of the following equations correctly represents Boyle’s Law, which is critical for understanding pulmonary ventilation?

Accepted Answer

$P_1V_1 = P_2V_2$

Question 5

A patient with chronic hypertension is at risk for increased mean arterial pressure (MAP). Which formula correctly calculates MAP?

Accepted Answer

$MAP = \frac{1}{3}(SBP - DBP) + DBP$

Question 6

A patient is experiencing dehydration, leading to increased blood osmolarity. Which hormone is most likely to be secreted in response to this condition?

Accepted Answer

Antidiuretic hormone (ADH)

Question 7

A person inhales pure oxygen at sea level. According to Dalton’s Law, which of the following best describes the partial pressure of oxygen in the inspired air?

Accepted Answer

It is the product of the fraction of oxygen and the total atmospheric pressure.

Question 8

A patient with pernicious anemia is unable to absorb vitamin B12. Which digestive organ is primarily responsible for the production of intrinsic factor necessary for B12 absorption?

Accepted Answer

Stomach

Question 9

Which of the following best describes the role of the Frank-Starling law in cardiac physiology?

Accepted Answer

It states that increased venous return leads to increased stroke volume.

Question 10

A patient is found to have a mutation in the SRY gene. Which of the following is the most likely consequence of this mutation?

Accepted Answer

Failure to develop male gonads

Question 11

Which of the following immunoglobulins is most abundant in the blood and is responsible for long-term immunity?

Accepted Answer

IgG

Question 12

A patient is experiencing vomiting and diarrhea. Which acid-base disorder is most likely to develop as a result?

Accepted Answer

Metabolic alkalosis

Question 13

Which of the following best describes the function of erythropoietin?

Accepted Answer

Stimulates the production of red blood cells

Question 14

A patient with a blocked coronary artery is at risk for decreased perfusion. Which of the following best defines perfusion?

Accepted Answer

The delivery of oxygen and nutrients to tissues via blood flow

Question 15

Which of the following best describes the function of the juxtaglomerular cells in the kidney?

Accepted Answer

They secrete renin to regulate blood pressure.

Question 16

A patient is exposed to an allergen and develops an immediate hypersensitivity reaction. Which immunoglobulin is primarily responsible for this response?

Accepted Answer

IgE

Question 17

Which of the following best describes the function of the intercalated discs in cardiac muscle?

Accepted Answer

They allow rapid transmission of electrical impulses between cardiac cells.

Question 18

A patient is found to have a deficiency in platelets. Which of the following is the most likely consequence?

Accepted Answer

Impaired blood clotting

Question 19

Which of the following best describes the role of the Sertoli cells in the male reproductive system?

Accepted Answer

They support and nourish developing sperm cells.

Question 20

A patient is experiencing symptoms of heart failure. According to the Frank-Starling law, which of the following would you expect to be decreased in this patient?

Accepted Answer

Stroke volume

Comprehensive Study Guide: Anatomy & Physiology Final Exam Topics

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