The function of the hair follicle receptor (root hair plexus) is to
bind the hair root to the dermis
serve as a source for new epidermal cells for hair growth after the resting stage has passed
allow the hair to assist in touch sensation
cause apocrine gland secretion into the hair follicle
The Correct Answer is C
A. bind the hair root to the dermis: The hair root is anchored to the dermis by the hair follicle itself and connective tissue structures. The receptor does not play a role in binding or physical attachment of the hair root.
B. serve as a source for new epidermal cells for hair growth after the resting stage has passed: New epidermal cells for hair growth arise from the hair matrix at the base of the follicle. The root hair plexus is a sensory nerve ending, not a cell-generating structure.
C. allow the hair to assist in touch sensation: The hair follicle receptor, or root hair plexus, is a network of sensory nerve endings wrapped around the follicle. It detects movement of the hair, making hair an important component of the tactile sensory system.
D. cause apocrine gland secretion into the hair follicle: Apocrine gland secretion is controlled by hormonal and neural signals, but not by the root hair plexus. The plexus functions in sensation, not glandular stimulation.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is E
Explanation
A. areolar CT:Areolar connective tissue provides support and flexibility beneath epithelial layers but does not line tubular structures like the kidney tubules.
B. simple columnar ET:Simple columnar epithelium is specialized for absorption and secretion in areas like the gastrointestinal tract. Its taller cells are not suited for the thin, absorptive lining required in kidney tubules.
C. nonkeratinized stratified squamous ET:This epithelium protects against abrasion in areas such as the esophagus and oral cavity, but its multiple layers and thickness make it inappropriate for kidney tubules where rapid exchange occurs.
D. simple squamous ET:Simple squamous epithelium allows rapid diffusion and is found in structures like the glomerulus, but it is too thin for the majority of the kidney tubules, which require more absorptive and secretory capacity.
E. simple cuboidal ET:Simple cuboidal epithelium forms the lining of most kidney tubules. Its cube-shaped cells provide the surface area necessary for absorption and secretion while maintaining a single-cell layer for efficient transport of substances.
Correct Answer is A
Explanation
A. transcription:Transcription is the process by which the DNA sequence of a gene is copied into messenger RNA (mRNA). This mRNA then exits the nucleus and carries the genetic code to ribosomes for protein synthesis.
B. replication:Replication is the process of copying the entire DNA molecule to produce two identical DNA strands during cell division. It does not produce mRNA and does not involve transporting genetic information out of the nucleus,
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