Question 1

Which of the following best describes the difference between endocrine and exocrine glands?

Accepted Answer

Endocrine glands secrete hormones directly into the bloodstream, while exocrine glands release their products through ducts to external or internal surfaces.

Question 2

A patient presents with high blood pressure and elevated aldosterone levels. Which endocrine system pathway is most likely activated?

Accepted Answer

Renin-Angiotensin System

Question 3

Which formula correctly relates blood pressure ($$BP$$), cardiac output ($$Q$$), and total peripheral resistance ($$TPR$$)?

Accepted Answer

$$BP = Q 	imes TPR$$

Question 4

Which of the following is a steroid hormone?

Accepted Answer

Cortisol

Question 5

A blood sample is centrifuged. Which layer contains the majority of white blood cells?

Accepted Answer

Buffy coat

Question 6

Which of the following is TRUE regarding the lifecycle of a red blood cell (RBC)?

Accepted Answer

RBCs are produced in the bone marrow and typically circulate for about 120 days before being removed by the spleen.

Question 7

Which of the following best describes the function of platelets?

Accepted Answer

They are involved in blood clotting by forming plugs at sites of vessel injury.

Question 8

A patient has a hematocrit ($$Hct) of 45$$%. What does this value represent?

Accepted Answer

The percentage of blood volume occupied by red blood cells.

Question 9

Which layer of the heart is responsible for the contractile force that pumps blood?

Accepted Answer

Myocardium

Question 10

Which of the following would most likely increase the metabolic rate of the heart?

Accepted Answer

Increased sympathetic nervous system activity

Question 11

Which of the following is a correct description of the pulmonary circuit?

Accepted Answer

It carries deoxygenated blood from the right ventricle to the lungs and returns oxygenated blood to the left atrium.

Question 12

Which of the following is a function of the renin-angiotensin system?

Accepted Answer

Regulation of blood pressure and fluid balance

Question 13

Which of the following statements about hormone action is correct?

Accepted Answer

Hormones bind to specific receptors on target cells to exert their effects.

Question 14

Which of the following is a major difference between the nervous and endocrine systems?

Accepted Answer

The nervous system acts rapidly and locally, while the endocrine system acts more slowly and has widespread effects.

Question 15

Which of the following would most likely result from upregulation of hormone receptors on a target cell?

Accepted Answer

Increased sensitivity to the hormone

Question 16

A patient is experiencing venous pooling in the lower limbs. Which of the following is a likely consequence?

Accepted Answer

Decreased return of blood to the heart, potentially leading to lower cardiac output

Question 17

Which of the following best describes the function of capillaries?

Accepted Answer

They allow exchange of gases, nutrients, and waste products between blood and tissues due to their thin walls and permeability.

Question 18

Which of the following is a correct sequence for the cardiac cycle?

Accepted Answer

Atrial systole → Ventricular systole → Ventricular diastole

Question 19

Which of the following is a function of white blood cells (leukocytes)?

Accepted Answer

Defending the body against infection and foreign substances

Study Guide: Endocrine, Blood, and Cardiovascular Systems

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