The Velocity of Blood Flow Is the Lowest in Capillaries

question 21

Multiple Choice

The velocity of blood flow is the lowest in capillaries because ________.

• A) the capillary walls are not thin enough to allow oxygen to exchange with the cells
• B) the capillaries have internal valves that slow the flow of blood
• C) the diastolic blood pressure is too low to deliver blood to the capillaries at a high flow rate
• D) the systemic capillaries are supplied by the left ventricle, which has a lower cardiac output than the right ventricle
• E) the total cross-sectional area of the capillaries is greater than the total cross-sectional area of the arteries or any other part of the circulatory system

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Definitions:

Vertigo

A condition characterized by a sensation of spinning or dizziness, often caused by problems within the inner ear or the vestibular nerve.

Tinnitus

The perception of noise or ringing in the ears, a common problem that can result from various underlying causes and can affect one's quality of life.

Nausea

A feeling of discomfort in the stomach often characterized by an urge to vomit.

Vomiting

The forceful expulsion of the contents of the stomach through the mouth.