Which of the Following Statements Is NOT True of the Precapillary

question 96

Multiple Choice

Which of the following statements is NOT true of the precapillary sphincters?

• A) They decrease the osmotic pressure in the thoroughfare channel.
• B) They allow blood to bypass the true capillaries that are fed by the metarteriole.
• C) They regulate the flow of blood to tissues served by the true capillaries.
• D) They increase or decrease rates of perfusion to the tissues served by the true capillaries.

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Definitions:

Lymph Nodes

Small, bean-shaped structures that are part of the body’s immune system, trapping pathogens and foreign particles.

Tonsils

Masses of lymphoid tissue located at the back of the throat that help protect the body from infection and play a role in the immune system.

Antigenic Determinants

Specific parts of a molecule that are recognized by the immune system, critical for the specificity of immune responses.

Epitopes

Specific parts of an antigen that are recognized by the immune system, specifically by antibodies, B cells, or T cells.