What is the name of the hormone at A?
Prolactin
Follicle-stimulating hormone
Oxytocin
Adrenocorticotropic hormone
The Correct Answer is A
A. Prolactin: Prolactin is secreted by the anterior pituitary and stimulates milk production (mammary gland alveolar cells). The arrow at A points to the breast, so prolactin is the appropriate hormone.
B. Follicle-stimulating hormone: FSH is an anterior-pituitary gonadotropin that acts on the ovaries/testes to stimulate follicle development and spermatogenesis, not directly on the mammary gland.
C. Oxytocin: Oxytocin (produced in the hypothalamus and released from the posterior pituitary) causes milk ejection (let-down) and uterine contraction, but the diagram’s arrow and context indicate the anterior-pituitary hormone that stimulates milk production (prolactin).
D. Adrenocorticotropic hormone: ACTH (from the anterior pituitary) targets the adrenal cortex to stimulate cortisol production, not the mammary gland.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is {"dropdown-group-1":"C"}
Explanation
A. thymus: The thymus secretes thymic hormones (immune function) - it does not control metabolic rate or fetal neural development.
B. parathyroid gland: The parathyroids secrete PTH to regulate calcium - not metabolic rate or alertness.
C. thyroid gland: The thyroid secretes T3/T4 which increase basal metabolic rate, enhance alertness and reflexes, and are critical for fetal nervous system development.
D. pancreas: The pancreas secretes insulin and glucagon regulating glucose metabolism, not primarily metabolic rate/alertness in the sense described.
Correct Answer is C
Explanation
A. The chemical properties of the hormone: Chemical properties (lipid-soluble vs water-soluble) determine how a hormone reaches/enters cells and what type of receptor it uses, but they do not by themselves make a specific cell responsive.
B. The location of the gland that secretes the hormone: Where the hormone is secreted from does not determine whether a particular cell is responsive.
C. The location of the target cells in the body: A cell becomes responsive to a particular hormone only if it possesses specific receptors for that hormone. These receptors can be on the cell surface or inside the cell, depending on the hormone type.
D. The site where the hormone is secreted: The secretion site does not determine a cell’s responsiveness.
Whether you are a student looking to ace your exams or a practicing nurse seeking to enhance your expertise , our nursing education contents will empower you with the confidence and competence to make a difference in the lives of patients and become a respected leader in the healthcare field.
Visit Naxlex, invest in your future and unlock endless possibilities with our unparalleled nursing education contents today