Question

Sweat is secreted by exocrine glands. This means that a. it is produced by endocrine cells. b. it is a hormone. c. it is secreted into a duct. d. it is produced outside the body.

Short answer

The correct answer is (c): Sweat is secreted into a duct.

Step-by-step solution

Understanding Exocrine Glands

Exocrine glands are glands that secrete their products, such as sweat, saliva, or enzymes, through ducts directly to their target site. This is different from endocrine glands, which secrete hormones directly into the bloodstream.

Analyzing Option A

Option A states that sweat is produced by endocrine cells. This statement is incorrect because endocrine cells are part of endocrine glands, and sweat is produced by exocrine glands, not endocrine glands.

Analyzing Option B

Option B suggests that sweat is a hormone. This statement is not accurate because hormones are chemical messengers secreted by endocrine glands into the bloodstream. Sweat is a product of exocrine glands and is not a hormone.

Analyzing Option C

Option C states that sweat is secreted into a duct. This statement is correct because exocrine glands, like sweat glands, secrete their products through ducts that lead directly to their target site.

Analyzing Option D

Option D claims that sweat is produced outside the body. Sweat is produced within the exocrine glands, which are located in the skin. The sweat then travels through the ducts to reach the surface of the skin. So, this statement is incorrect, as sweat is produced inside the body, although it is eventually secreted outside through the skin. With the analysis of each option, the answer is clear.

Answer

The correct answer is (c): Sweat is secreted into a duct.