What makes a cell responsive to a particular hormone?
The chemical properties of the hormone
The presence of a receptor for that particular hormone
The location of the gland that secretes the hormone
The location of the target cells in the body
The site where the hormone is secreted
The Correct Answer is B
A. The chemical properties of the hormone:
Chemical properties determine solubility and transport but do not alone determine cellular response.
B. The presence of a receptor for that particular hormone:
A hormone exerts its effects only on cells that express specific receptors for that hormone.
C. The location of the gland that secretes the hormone:
Hormones are typically secreted into the bloodstream and can act at distant sites; gland location does not determine target cell responsiveness.
D. The location of the target cells in the body:
Location doesn’t matter unless the cells have the appropriate receptors.
E. The site where the hormone is secreted:
The site of secretion is irrelevant to whether a target cell can respond; it must have the receptor.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
A. Na⁺ (Sodium): Sodium is the major extracellular cation and is the primary determinant of extracellular fluid volume and osmosis.
B. Cl⁻ (Chloride): Important, but usually follows sodium; not the primary driver of water distribution.
C. Ca²⁺ (Calcium): Vital for many functions but not the main regulator of fluid distribution.
D. K⁺ (Potassium): Primary intracellular cation, but sodium has a greater role in overall water movement across compartments.
E. Pi (Phosphate): Mainly intracellular; important in buffering and metabolism but not in water distribution.
Correct Answer is C
Explanation
A. Telomeres are cytoplasmic enzymes involved in senescence:
Telomeres are not enzymes and are not located in the cytoplasm. They are DNA structures found at the ends of chromosomes.
B. Telomeres are antioxidants that slow the progress of senescence:
Telomeres are not antioxidants; instead, they shorten with each cell division and are associated with the aging process.
C. Telomeres are DNA segments at each end of a chromosome:
Telomeres are repetitive nucleotide sequences (TTAGGG in humans) that protect chromosome ends from deterioration or fusion with neighboring chromosomes.
D. Telomeres are proteins that cap the ends of the chromosomes:
While telomere-associated proteins (like shelterin) exist, telomeres themselves are DNA sequences, not proteins.
E. Telomeres are motor molecules that guide embryonic cells to the right destinations:
Telomeres do not have a role in cell migration or embryonic development navigation.
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