Question 1

A patient presents with symptoms of Cushing's syndrome. Which of the following laboratory findings would most likely be observed in this patient?

Accepted Answer

High plasma cortisol and low ACTH levels

Question 2

Which of the following best describes the Frank-Starling Law of the heart?

Accepted Answer

The force of contraction increases as the end-diastolic volume increases

Question 3

A person is experiencing hypovolemic shock. Which compensatory mechanism will most likely be activated first?

Accepted Answer

Increased release of antidiuretic hormone (ADH)

Question 4

Which of the following equations correctly relates blood flow ($$Q$$), pressure difference ($$\Delta P$$), and resistance ($$R) in $$the circulatory system?

Accepted Answer

$$Q = \frac{\Delta P}{R}$$

Question 5

A patient with Addison's disease is likely to have which of the following electrolyte imbalances?

Accepted Answer

Hyponatremia and hyperkalemia

Question 6

Which of the following best explains why angiotensin II increases blood pressure?

Accepted Answer

It stimulates vasoconstriction and increases aldosterone secretion

Question 7

A red blood cell is placed in a hypotonic solution. What will happen to the cell?

Accepted Answer

It will swell and may burst due to water influx

Question 8

Which hormone is primarily responsible for stimulating the release of cortisol from the adrenal cortex?

Accepted Answer

Adrenocorticotropic hormone (ACTH)

Question 9

During ventricular systole, which of the following events occurs?

Accepted Answer

The semilunar valves open

Question 10

Which of the following is a correct sequence of events in the intrinsic pathway of blood coagulation?

Accepted Answer

Activation of factor XII, followed by activation of factor XI

Question 11

A patient with diabetes mellitus is at increased risk for which of the following complications due to chronic hyperglycemia?

Accepted Answer

Atherosclerosis

Question 12

Which of the following best describes the role of aldosterone in the body?

Accepted Answer

It promotes sodium reabsorption and potassium excretion in the kidneys

Question 13

Which of the following is a characteristic of capillaries that facilitates efficient exchange of substances?

Accepted Answer

Large surface area and thin walls

Question 14

A patient is found to have a deficiency in vitamin K. Which process will be most directly affected?

Accepted Answer

Synthesis of clotting factors

Question 15

Which of the following best describes the difference between plasma and serum?

Accepted Answer

Plasma contains clotting factors, serum does not

Question 16

Which of the following is the correct pathway for the conduction of electrical impulses in the heart?

Accepted Answer

SA node → AV node → Bundle of His → Purkinje fibers

Question 17

Which of the following is a function of erythropoietin?

Accepted Answer

Stimulates red blood cell production

Question 18

A patient with hyperaldosteronism is likely to present with which of the following symptoms?

Accepted Answer

Hypernatremia and hypertension

Question 19

Which of the following best describes the effect of norepinephrine on blood vessels?

Accepted Answer

It causes vasoconstriction of arterioles

Question 20

Which of the following formulas is used to calculate mean arterial pressure ($$MAP$$)?

Accepted Answer

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

Comprehensive Study Guide: Endocrine, Cardiovascular, and Blood Physiology

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