A Sphincter Is a

question 111

Multiple Choice

A sphincter is a

• A) thickening of the longitudinal layer of the muscularis that propels materials through the GI tract.
• B) thickening of the circular layer of the muscularis that controls movement of materials through the GI tract.
• C) fold of the mucosa of the GI tract that increases the total surface area for absorption of nutrients.
• D) circle of adventitia that anchors the GI tract to neighboring structures.

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Definitions:

Mathematical Expression

A combination of numbers, symbols, and operators (such as +, -, *, /) that represents a quantitative relationship or value.

Present Value Calculation

A formula used to determine the current value of a sum of money to be received in the future, accounting for a specific interest rate.

Exponentiation

A mathematical operation involving the raising of one number to the power of another.

Variable Substitution

In mathematics, this involves replacing variables with other variables or values to simplify expressions or solve equations.