Which Structure Regulates the Flow of Material into the Colon

question 15

Multiple Choice

Which structure regulates the flow of material into the colon?

• A)Ileocecal sphincter
• B)Pyloric sphincter
• C)Appendix
• D)Sigmoid colon
• E)Anal canal

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Definitions:

Closed Circulatory System

A type of circulatory system in which the blood flows through a continuous circuit of blood vessels; characteristic of annelids, cephalopods, and vertebrates. Compare with open circulatory system.

Mollusks

A diverse group of invertebrates that includes snails, slugs, oysters, and octopuses, characterized by a soft body, many with a hard shell.

Polyplacophora

A class of marine mollusks known as chitons, characterized by their eight-plated dorsal shells and grazing habits.

Intertidal Zone

The marine shoreline area between the high-tide mark and the low-tide mark.