ATI RN
Anatomy And Physiology Nutrition And Metabolism Question Quizlet Questions
Question 1 of 5
The ___ in keratinocytes protects the epidermis and dermis from the harmful effects of sunlight.
Correct Answer: C
Rationale: Melanin, produced by melanocytes and present in keratinocytes, absorbs UV radiation to protect skin from sunlight damage.
Question 2 of 5
The central canal of an osteon contains
Correct Answer: D
Rationale: The central (Haversian) canal of an osteon contains blood vessels and nerves.
Question 3 of 5
A fascicle is a
Correct Answer: A
Rationale: A fascicle is a bundle of muscle fibers wrapped by perimysium.
Question 4 of 5
The efferent division of the peripheral nervous system innervates ___ cells.
Correct Answer: D
Rationale: The efferent division innervates all listed cell types (skeletal, smooth, heart muscle, and glandular cells) via somatic and autonomic pathways.
Question 5 of 5
The axon is connected to the soma at the
Correct Answer: D
Rationale: The axon hillock is the region where the axon connects to the neuron's cell body (soma).