The External Anal Sphincter

question 191

Multiple Choice

The external anal sphincter:

• A)is the last part of the defecation reflex arc
• B)provides voluntary control of defecation
• C)both A and B
• D)both A and B and is made of smooth muscle

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Definitions:

Bryophytes

Non-vascular plants that include mosses, liverworts, and hornworts, characterized by their life cycles and lack of true roots and leaves.

Sporophytes

The diploid, spore-producing phase in the life cycle of plants that undergo alternation of generations.

Triploid Cell

A cell that has three sets of chromosomes, often occurring in plants and some species of fish and amphibians.

Angiosperms

These are flowering plants, making up the largest group in the plant kingdom, characterized by producing seeds enclosed within a fruit.