Question 1

Which of the following best describes the functional characteristics of all muscle tissue types?

Accepted Answer

Excitability, contractility, extensibility, elasticity

Question 2

A patient is experiencing muscle fatigue during intense exercise. Which metabolic pathway is primarily responsible for rapid ATP production under these anaerobic conditions?

Accepted Answer

Glycolysis

Question 3

During skeletal muscle contraction, which protein directly binds to calcium ions to initiate the exposure of binding sites on actin?

Accepted Answer

Troponin

Question 4

A person suffers a deep cut that damages the tunica media of an artery. Which of the following is most likely to be affected as a result?

Accepted Answer

Vasoconstriction and vasodilation

Question 5

Which of the following equations correctly represents cardiac output?

Accepted Answer

$$CO = HR 	imes SV$$

Question 6

A patient with a mutation affecting the spectrin protein would most likely have abnormalities in which blood component?

Accepted Answer

Erythrocytes

Question 7

Which of the following best explains why the heart cannot undergo tetanus like skeletal muscle?

Accepted Answer

The cardiac muscle refractory period is longer than the contraction period

Question 8

A patient is diagnosed with anemia due to decreased erythropoiesis. Which hormone is most likely deficient?

Accepted Answer

Erythropoietin

Question 9

Which of the following is the correct sequence of events in hemostasis?

Accepted Answer

Vascular spasm → Platelet plug formation → Coagulation

Question 10

A patient with a blocked lymphatic vessel in the lower limb is most likely to develop which of the following?

Accepted Answer

Edema

Question 11

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

Accepted Answer

Reduces surface tension to prevent alveolar collapse

Question 12

A patient has a blood pressure of 120/80 mmHg. Which of the following best represents the mean arterial pressure (MAP)? Use the formula $$MAP = \frac{1}{3}(SBP - DBP) + DBP.$$

Accepted Answer

$$MAP = 93$$ mmHg

Question 13

Which of the following white blood cells is primarily responsible for mediating humoral immunity?

Accepted Answer

B lymphocytes

Question 14

A patient is found to have a mutation that prevents the formation of gap junctions in cardiac muscle. Which of the following is most likely impaired?

Accepted Answer

Electrical conduction between cardiac cells

Question 15

Which of the following best explains why veins require valves, but arteries do not?

Accepted Answer

Veins operate under lower pressure and need valves to prevent backflow

Question 16

A person inhales deeply and then exhales forcefully. Which muscles are primarily responsible for forced expiration?

Accepted Answer

Internal intercostals and abdominal muscles

Question 17

Which of the following best describes the Bohr effect in gas transport?

Accepted Answer

Increased CO$$_2$$ lowers blood pH, reducing hemoglobin's affinity for O$$_2$$

Question 18

A patient with a deficiency in antidiuretic hormone (ADH) would most likely experience which of the following?

Accepted Answer

Increased urine output and dehydration

Question 19

Which of the following is the correct order of blood flow through the heart, starting from the right atrium?

Accepted Answer

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

Question 20

A patient is found to have a high capillary hydrostatic pressure ($$P_c). $$Which of the following is a likely consequence?

Accepted Answer

Increased filtration of fluid out of the capillaries, leading to edema

Anatomy & Physiology: Muscular, Cardiovascular, Lymphatic, and Respiratory Systems Study Guide

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