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Vessels and Circulation Chapter 22 Introduction

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Vessels and Circulation Chapter 22 Introduction

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Questions and Answers

What is the primary function of capillaries?

To produce red blood cells

To exchange nutrients and waste with surrounding tissue (correct)

To regulate blood pressure

To transport oxygen to tissues

What type of capillaries have gaps in their endothelium?

Fenestrated capillaries

Sinusoids (correct)

Discontinuous capillaries

Continuous capillaries

What is the term for a collection of capillaries?

Capillary network

Capillary bed (correct)

Capillary system

Capillary

Which type of vein collects blood from capillaries?

Venules Signup and view all the answers

What is the mechanism responsible for exchange of materials through pores in capillary walls?

Diffusion across pores Signup and view all the answers

What is the outermost layer of an arteriole?

Adventitia Signup and view all the answers

What is the primary function of the pulmonary circuit?

Supply the lungs Signup and view all the answers

Where does the systemic circuit begin and end?

Begins at the Aortic Valve and ends at the Rt Atrium Signup and view all the answers

What is the function of the intima in arteries?

It allows for expansion and relaxation in response to the pressure wave of blood flow Signup and view all the answers

What type of artery is characterized by its lack of vasoconstriction in response to sympathetic or local stimulation?

Elastic Arteries Signup and view all the answers

What occurs as vessels enter organs?

They branch out to form smaller vessels Signup and view all the answers

What is the function of the media layer in blood vessels?

It causes vasoconstriction and vasodilation Signup and view all the answers