Lipids are needed by the body: (Select all that apply)

For fluid balance

As component of myelin sheath

Component of hemoglobin

As component of cell membrane

As an energy source

Answer and Explanation

Correct Answer : B,D,E

A. For fluid balance: Lipids do not play a direct role in maintaining fluid balance; electrolytes and plasma proteins like albumin regulate this function.

B. As a component of the myelin sheath: Lipids, particularly phospholipids and cholesterol, are essential for forming the myelin sheath, which insulates nerve fibers and facilitates efficient nerve conduction.

C. Component of hemoglobin: Hemoglobin is composed of iron and protein (globin chains), not lipids.

D. As a component of the cell membrane: Cell membranes are composed of a lipid bilayer (phospholipids and cholesterol), which helps maintain structural integrity and fluidity.

E. As an energy source: Lipids provide a concentrated energy source, yielding 9 kcal per gram, which is more than carbohydrates (4 kcal/g).

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Correct Answer is A

Explanation

A. Are found primarily in the axillary and genital areas: Apocrine glands are sweat glands located in the armpits (axillary) and genital regions. They become active at puberty and secrete a thicker sweat that can cause body odor.

B. Are endocrine glands: Apocrine glands are exocrine glands, not endocrine. They release their secretions onto the skin surface through ducts rather than into the bloodstream.

C. Arise within the hypodermis: Apocrine glands are located in the dermis, not the hypodermis. The hypodermis consists mostly of fat.

D. Are called oil glands: Oil glands (sebaceous glands) produce sebum, while apocrine glands secrete sweat.

A. Lipids B. Glucose C. Proteins D. Carbohydrates

Correct Answer is C

Explanation

A. Lipids: Some hormones (e.g., steroid hormones like estrogen and testosterone) are lipid-based, but not all. Hemoglobin is a protein, not a lipid.

B. Glucose: Glucose is a carbohydrate used for energy, not for building hormones or hemoglobin.

C. Proteins: Hormones (such as insulin and growth hormone) and hemoglobin (which carries oxygen in red blood cells) are protein-based molecules essential for bodily functions.

D. Carbohydrates: Carbohydrates provide energy but do not contribute to the structure of proteins like hormones and hemoglobin.

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Lipids are needed by the body: (Select all that apply)

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Naxlex Comprehensive Predictor Exams

Apocrine glands:

Correct Answer is A

Explanation

Which of the following best describes what hormones and hemoglobin are made with?

Correct Answer is C

Explanation

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