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What is an example of mechanical digestion?

A.

Mastication

B.

Absorption

C.

Catabolism

D.

Anabolism

Answer and Explanation

The Correct Answer is A

A. Mastication: Mechanical digestion involves physically breaking down food into smaller pieces, and mastication is a prime example of this.

B. Absorption: This is the process by which nutrients pass from the digestive system into the bloodstream, not a form of mechanical digestion.

C. Catabolism: Catabolism refers to chemical processes that break down molecules within the body, not mechanical digestion.

D. Anabolism: This refers to the synthesis of complex molecules from simpler ones, not related to the physical breakdown of food.


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Related Questions

Correct Answer is C, A, D, B

Explanation

  • Deoxygenated blood from the body enters the right atrium, passes through the tricuspid valve into the right ventricle.
  • From the right ventricle, blood moves through the pulmonary valve into the pulmonary arteries and goes to the lungs for oxygenation.
  • Oxygenated blood returns to the left atrium and passes through the bicuspid (mitral) valve into the left ventricle.
  • Finally, the left ventricle pumps oxygenated blood through the aortic valve into the aorta for distribution to the body.

Correct Answer is D

Explanation

A. Hymen: The hymen is a thin membrane that partially covers the vaginal opening, but it does not separate the vagina from the uterus.

B. Fundus: The fundus is the upper part of the uterus, but it does not separate the vagina from the uterus.

C. Adventitia: This is the outer layer of the uterus, but it does not serve as a separator between the vagina and uterus.

D. Cervix: The cervix is the lower part of the uterus that protrudes into the vagina and acts as a barrier separating the two structures.

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