An arrector pili muscle a. is associated with each sweat gland, b. can cause a hair to stand up straight, c. enables each hair to be stretched when wet, d. provides new cells for continued growth of its associated hair.

Verified step by step guidance

1. Identify the function of the arrector pili muscle in the skin.
2. Recall that the arrector pili muscle is a small band of smooth muscle fibers.
3. Understand that the arrector pili muscle is attached to hair follicles in mammals.
4. Recognize that the contraction of the arrector pili muscle causes the hair to stand up, a phenomenon known as piloerection or 'goosebumps'.
5. Determine which option aligns with the function of causing hair to stand up.

Key Concepts

Arrector Pili Muscle Function

The arrector pili muscle is a small, smooth muscle attached to hair follicles. Its primary function is to contract in response to cold or emotional stimuli, causing the hair to stand upright, a phenomenon known as piloerection. This reaction can help with insulation and is often associated with the 'goosebumps' effect.

Hair Follicle Anatomy

Hair follicles are complex structures in the skin that produce hair. Each follicle is surrounded by various types of cells, including those that provide nourishment and support for hair growth. Understanding the anatomy of hair follicles is essential for comprehending how the arrector pili muscle interacts with hair.

Sweat Glands and Their Relationship

Sweat glands are exocrine glands that help regulate body temperature through perspiration. While the arrector pili muscle is not directly associated with sweat glands, it is important to understand their separate functions in the skin's response to temperature and stress. This distinction clarifies the role of the arrector pili muscle in relation to hair and skin physiology.