$$Flow = \frac{\text{difference in pressure}}{\text{resistance}}$$

Question 1

Which type of blood vessel is primarily responsible for the exchange of gases, nutrients, and waste products between blood and tissues?

Accepted Answer

Capillaries

Question 2

Which equation correctly represents cardiac output (CO) in terms of stroke volume (SV) and heart rate (HR)?

Accepted Answer

$$CO = SV 	imes HR$$

Question 3

A patient has an end-diastolic volume (EDV) of 120 mL and an end-systolic volume (ESV) of 50 mL. What is their stroke volume (SV)?

Accepted Answer

$$SV = EDV - ESV = 120\,mL - 50\,mL = 70\,mL$$

Question 4

Which hormone is released by the adrenal medulla and increases heart rate, stroke volume, and vasoconstriction?

Accepted Answer

Epinephrine (adrenaline)

Question 5

What is the primary effect of aldosterone on blood pressure regulation?

Accepted Answer

Increases water retention by increasing sodium reabsorption

Question 6

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

Accepted Answer

The strength of contraction increases with increased stretch of the heart muscle

Question 7

Which vessel type contains the highest percentage of total blood volume in the body?

Accepted Answer

Veins

Question 8

What is the main function of baroreceptors in the cardiovascular system?

Accepted Answer

Detect changes in blood pressure and help regulate it

Question 9

Which equation correctly represents mean arterial pressure (MAP)?

Accepted Answer

$$MAP = diastolic\ pressure + \frac{1}{3}(systolic\ pressure - diastolic\ pressure)$$

Question 10

Which hormone is primarily responsible for increasing red blood cell production in response to low oxygen levels?

Accepted Answer

Erythropoietin (EPO)

Question 11

Which of the following mechanisms is most important for short-term regulation of blood pressure?

Accepted Answer

Baroreceptor reflexes

Question 12

What is the effect of vasopressin (ADH) on the kidneys?

Accepted Answer

Increases water retention

Question 13

Which of the following is a direct effect of increased preload on the heart?

Accepted Answer

Increased strength of contraction

Question 14

Which vessel type is most likely to have 'check valves' to prevent backflow of blood?

Accepted Answer

Veins

Question 15

Which of the following best describes the role of chemoreceptors in the cardiovascular system?

Accepted Answer

Detect changes in blood oxygen and carbon dioxide levels

Question 16

Which of the following would most likely increase total peripheral resistance (TPR)?

Accepted Answer

Increased blood viscosity

Question 17

Which hormone is released in response to increased myocardial stretch and acts to antagonize aldosterone?

Accepted Answer

Atrial natriuretic peptide (ANP)

Question 18

If a patient’s blood pressure is 120/80 mmHg, what is their pulse pressure?

Accepted Answer

$$Pulse\ Pressure = Systolic\ Pressure - Diastolic\ Pressure = 120\,mmHg - 80\,mmHg = 40\,mmHg$$

Question 19

Which of the following is a long-term mechanism for blood pressure regulation?

Accepted Answer

Renal control of blood volume

Question 20

Which of the following is the correct formula for flow in terms of pressure and resistance?

Accepted Answer

$$Flow = \frac{	ext{difference in pressure}}{	ext{resistance}}$$

BIO EXAM 3B

Study Guide - Practice Questions