Question 1

Which of the following best describes the primary function of erythrocytes in the blood?

Accepted Answer

Carrying oxygen from the lungs to tissues and carbon dioxide from tissues to the lungs

Question 2

A patient presents with a low erythrocyte count. Which of the following is the most likely consequence?

Accepted Answer

Reduced oxygen delivery to tissues

Question 3

Which hormone is primarily responsible for stimulating erythropoiesis in the bone marrow?

Accepted Answer

Erythropoietin

Question 4

A patient is diagnosed with hemophilia. Which aspect of hemostasis is most directly affected?

Accepted Answer

Coagulation cascade

Question 5

Which of the following best explains why calcium ($$Ca^{2+}) is $$essential for blood coagulation?

Accepted Answer

It is required for the activation of several clotting factors

Question 6

Which of the following is a correct formula for calculating Net Filtration Pressure (NFP) across a capillary wall?

Accepted Answer

$$NFP = (HP_c - HP_i) - (OP_c - OP_i)$$

Question 7

A patient with liver failure has decreased plasma protein production. What is the most likely effect on capillary exchange?

Accepted Answer

Decreased capillary osmotic pressure, leading to edema

Question 8

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

Accepted Answer

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

Question 9

Which of the following is a function of the hormone antidiuretic hormone (ADH)?

Accepted Answer

Promotes water reabsorption in the kidneys

Question 10

A patient is experiencing shock due to severe blood loss. Which type of shock is this?

Accepted Answer

Hypovolemic shock

Question 11

Which of the following best describes the role of arterioles in the circulatory system?

Accepted Answer

They regulate blood flow and pressure by changing diameter

Question 12

Which of the following is a correct description of the intrinsic cardiac conduction system?

Accepted Answer

It generates and conducts electrical impulses independently of the nervous system

Question 13

Which of the following best explains why veins have valves?

Accepted Answer

To prevent backflow of blood and ensure one-way movement toward the heart

Question 14

A patient with a mutation causing nonfunctional B lymphocytes would most likely have which of the following problems?

Accepted Answer

Impaired antibody production

Question 15

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

Accepted Answer

Vasoconstriction, platelet plug formation, coagulation

Question 16

Which of the following best describes the effect of aldosterone on blood pressure?

Accepted Answer

It increases sodium and water reabsorption, raising blood pressure

Question 17

A patient with a deficiency in platelets would most likely experience which of the following?

Accepted Answer

Impaired blood clotting

Question 18

Which of the following is a major function of plasma proteins in the blood?

Accepted Answer

Maintaining osmotic pressure

Question 19

Which of the following best describes the role of the lymphatic system in relation to the cardiovascular system?

Accepted Answer

It returns excess interstitial fluid to the bloodstream

Question 20

A patient with chronic hypertension is at risk for which of the following complications?

Accepted Answer

Damage to blood vessel walls and increased risk of atherosclerosis

Exam I Review: Endocrine System, Blood, Heart, and Blood Vessels

Study Guide - Practice Questions