Question

question 43

the composition of the secretions of the eccrine glands is ______.

a primarily uric acid

b metabolic wastes

c fatty substances, proteins, antibodies, and trace amounts of minerals and

d 99% water, sodium chloride, trace amounts of wastes, and vitamin c

Explanation:

Identify the gland type

Using the Sudoriferous Gland Structure knowledge point
Eccrine glands are the most numerous type of sweat gland (sudoriferous gland) in the body, primarily responsible for thermoregulation.

Analyze secretion composition

Using the Sweat Gland Anatomy knowledge point
Eccrine sweat is a hypotonic filtrate of blood plasma, consisting of approximately 99% water, salts (mostly sodium chloride), trace metabolic wastes (such as urea, uric acid, and ammonia), and vitamin C.

Evaluate the options

• Option A is incorrect because uric acid is only present in trace amounts, not primarily.
• Option B is incorrect because metabolic wastes are only a minor component.
• Option C describes apocrine sweat gland secretions (which contain lipids and proteins).
• Option D accurately describes the composition of eccrine sweat.

Answer:

• (A) primarily uric acid
• (B) metabolic wastes
• (C) fatty substances, proteins, antibodies, and trace amounts of minerals and water
• (D) 99% water, sodium chloride, trace amounts of wastes, and vitamin C (Correct answer)