The Urge to Defecate Is Caused by

question 23

Multiple Choice

The urge to defecate is caused by

• A)constriction of the internal sphincter.
• B)the rectum filling with feces.
• C)cognitive processes.
• D)fluid volume in the stomach.
• E)relaxation of the external sphincter.

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Definitions:

Lysosome

A membrane-bound cell organelle that contains digestive enzymes to break down waste materials and cellular debris.

Golgi Apparatus

A cell organelle involved in the modification, sorting, and packaging of proteins for secretion or for use within the cell.

Mitochondrion

An organelle found in large numbers in most cells, where it produces energy through respiration and regulates cellular metabolism.

Flagellum

A long, whip-like structure used by cells and microorganisms for movement.