After a Vasectomy, a Man Is Not Considered to Be

question 83

Multiple Choice

After a vasectomy, a man is not considered to be infertile until he has submitted two semen samples after three months.This is to make sure that _____.

• A)no sperm cells are left over in his reproductive tract following surgery
• B)his scars have healed
• C)he is ejaculating properly
• D)a sufficient cut was made in his urethra

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Definitions:

White Matter

Central nervous system tissue consisting primarily of myelin-wrapped axons.

Myelinated Axons

Axons that are covered with a fatty substance called myelin, which increases the speed at which electrical impulses propagate along the nerve cell.

Cephalization

Evolutionary trend whereby neurons that detect stimuli and process information become concentrated in the head of a bilateral animal.

Planarian Flatworms

A group of free-living flatworms known for their remarkable regenerative abilities, commonly used in research on regeneration and stem cells.