Question

Using key choices, complete the following statements. Insert the appropriate letters) or term(s) in the answer blanks.

Key Choices
A. Arrector pili
B. Cutaneous receptors
C. Hair
E: Sebaceous glands
F. Sweat gland (apocrine)
G. Sweat gland
____________A blackhead is an accumulation of oily material produced by

Answer 1

A blackhead is caused by a blockage in the sebaceous glands which produce sebum. Goose bumps are caused by arrector pili muscles contracting in response to certain stimuli.

Step-by-step explanation:

A blackhead is an accumulation of oily material produced by sebaceous glands. These glands are associated with hair follicles and secrete an oily substance called sebum, which waterproofs and lubricates the hair and skin. If a sebaceous gland becomes plugged with sebum, it can develop into a blackhead or a pimple, especially if it also becomes infected.

In response to stimuli from the sympathetic nervous system, the arrector pili are responsible for goose bumps (C). These small muscles are located near hair follicles and contract to make the hair 'stand up', which is commonly seen when we are cold or frightened.

Answer 2

A blackhead is an accumulation of oily material produced by E: Sebaceous glands.

Step-by-step explanation:

The statement refers to the formation of a blackhead, and the appropriate term to fill in the blank is "Sebaceous glands." Here's an explanation of the key choices:

A. Arrector pili: These are small muscles attached to hair follicles, causing the hair to stand upright (goosebumps).

B. Cutaneous receptors: These are sensory receptors in the skin that respond to stimuli like touch, pressure, temperature, and pain.

C. Hair: This term refers to the thread-like structures emerging from hair follicles in the skin.

E. Sebaceous glands: These glands produce sebum, an oily substance that helps keep the skin and hair moisturized.

F. Sweat gland (apocrine): Apocrine sweat glands are a type of sweat gland associated with hair follicles, and they become active during puberty.

G. Sweat gland: Eccrine sweat glands are the major type of sweat glands responsible for regulating body temperature.

In the context of a blackhead, the sebaceous glands play a role in producing the oily material that contributes to its formation.

Option E (Sebaceous glands) is the answer that completes the statement.