_________ glands have vesicles that release their secretion by exocytosis.
Merocrine
Mucous
Holocrine
Endocrine
The Correct Answer is A
A. Merocrine: Merocrine glands secrete their products by exocytosis, where vesicles release substances such as sweat or enzymes without damaging the gland cell. This is the most common method of glandular secretion.
B. Mucous: Mucous glands produce thick, viscous secretions rich in glycoproteins, but the term describes the type of secretion rather than the mechanism. They can still use merocrine exocytosis to release their products.
C. Holocrine: Holocrine glands release their secretion when the entire gland cell ruptures and disintegrates, releasing cell contents along with the secretion. This process is not exocytosis.
D. Endocrine: Endocrine glands release hormones directly into the bloodstream rather than through ducts. They do not use exocytosis of vesicles into ducts, making them different from merocrine glands.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
A. areolar, cartilage:Areolar connective tissue is highly vascularized, providing nutrients and support to surrounding tissues. In contrast, cartilage is avascular, relying on diffusion from surrounding tissues for nutrients and waste removal.
B. dense regular connective; dense irregular connective:Both dense regular and dense irregular connective tissues have limited vascularization, so this pair does not accurately reflect a highly vascular versus nonvascular comparison.
C. nervous; bone:Nervous tissue has some blood supply but is not considered highly vascular compared to connective tissues. Bone is highly vascularized, containing Haversian canals, so this pair is reversed.
D. epithelial; skeletal muscle:Epithelial tissue is avascular and relies on underlying connective tissue for nutrient diffusion, while skeletal muscle is highly vascularized to meet metabolic demands.
Correct Answer is C
Explanation
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.
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