The Cardiovascular System: Blood Vessels and Circulation Chapter 20 Quiz

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What is the function of the skeletal muscle pump in the venous system?

To put pressure on veins to force blood back toward the heart (correct)

To decrease pressure in veins and increase flow

To constrict veins and capillaries

To increase resistance in veins and decrease flow

Which of the following is true about vasoconstriction?

Increases pressure and resistance in an artery, but decreases flow (correct)

Has no effect on pressure or flow in an artery

Increases flow without affecting pressure in an artery

Decreases pressure in an artery and increases flow

How does bulk flow contribute to capillary exchange?

Pushes fluid out of capillaries and into tissues (correct)

Pulls fluid from tissues into capillaries

Has no impact on capillary exchange

Prevents any fluid exchange between capillaries and tissues

What is the approximate amount of fluid that gets reabsorbed back into capillaries daily?

10 L Signup and view all the answers

Which hormone targets the kidneys to reabsorb water, increasing blood volume and pressure?

Antidiuretic Hormone (ADH) Signup and view all the answers

What is a function of the Renin-Angiotensin-Aldosterone Mechanism?

Increases Na+ reabsorption in the kidneys Signup and view all the answers

Which condition is characterized by chronic high blood pressure that may lead to various health issues?

Hypertension Signup and view all the answers

What is the primary cause of Hypovolemic Shock?

Hemorrhage Signup and view all the answers

How does exercise affect LDL cholesterol levels according to the text?

Decreases LDL cholesterol levels Signup and view all the answers

What is a potential outcome of circulatory shock?

Inability to deliver adequate oxygen for normal cellular metabolism Signup and view all the answers

What is the function of vasa vasorum?

Deliver nutrients and remove waste from the cells of large vessels Signup and view all the answers

Which layer of a blood vessel is innervated by nervi vasorum and controlled by hormones and local chemicals?

Tunica media Signup and view all the answers

In a capillary bed, what is the function of a precapillary sphincter?

Allow blood into a capillary bed or not Signup and view all the answers

Which type of capillary is permeable to larger molecules due to its pores?

Fenestrated Signup and view all the answers

What is the primary function of venules?

To bring blood back toward the heart Signup and view all the answers

What component of blood pressure represents the pressure during ventricular relaxation?

Diastolic pressure Signup and view all the answers

How would an increase in vessel radius affect resistance, blood flow, and pressure?

Increase resistance, increase flow, increase pressure Signup and view all the answers

What does a lower blood volume (hypovolemia) lead to in terms of blood pressure?

Increase blood pressure Signup and view all the answers

What is the role of the external elastic membrane in arteries?

To separate the tunic media from the outer tunic Signup and view all the answers

What is the average force driving blood into the vessels calculated as diastolic BP + (systolic-diastolic BP) / 3?

Mean arterial pressure (MAP) Signup and view all the answers