19. Blood Vessels

Pre-capillary sphincters | Circulatory system physiology | NCLEX-RN | Khan Academy

Showing 7 of 7 videos

Learn with other creators

Pre-capillary sphincters | Circulatory system physiology | NCLEX-RN | Khan Academy

04:20

Blood Vessels, Part 1 - Form and Function: Crash Course Anatomy & Physiology #27

Capillaries: Overview & Definition – Histology | Lecturio

Three types of capillaries | Circulatory system physiology | NCLEX-RN | Khan Academy

Practice this topic

Which type of capillary is characterized by a discontinuous basement membrane, allowing for the easy passage of larger molecules and cells?

Which of the following areas of the body has the highest concentration of capillary beds?

Which of the following best describes the microcirculatory flow of blood (microcirculation)?

Which scenario results in constriction of arterioles & precapillary sphincters in mesenteric capillary beds?

Which structure regulates blood flow distribution in mesenteric capillary beds & diverts blood from one area to another based on local metabolic needs?

Exchange of gases and nutrients occurs by diffusion between the __________.

The only vessels that provide direct access to nearly every cell in the body are the __________.

805

The presence of __________ stabilizes the wall of capillaries.

A metarteriole is a vessel that __________.

Large molecules such as peptides and proteins move into and out of the bloodstream by way of (a) continuous capillaries, (b) fenestrated capillaries, (c) thoroughfare channels, (d) venules.

The local control of blood flow due to the action of precapillary sphincters is (a) vasomotion, (b) autoregulation, (c) selective resistance, (d) turbulen

How is the anatomy of capillaries and capillary beds well suited to their function?

Why do capillaries permit the diffusion of materials, whereas arteries and veins do not?

List three ways in which substances can cross the capillary wall.

Which of the following structures is the 'leakiest'?

a. Continuous capillary

b. Sinusoidal capillary

c. Precapillary sphincter

d. Fenestrated capillary

Which of the following correctly describes the flow of blood through a mesenteric capillary bed when the precapillary sphincters are constricted?