Fluid intake is governed mainly by hypothalamic neurons called
baroreceptors
proprioceptors
nociceptors
osmoreceptors
Mechanoreceptors
The Correct Answer is D
A. Baroreceptors: Sense blood pressure changes, not osmolarity or thirst.
B. Proprioceptors: Detect body position and movement; unrelated to fluid balance.
C. Nociceptors: Detect pain; not involved in fluid regulation.
D. Osmoreceptors: Located in the hypothalamus, they detect changes in blood osmolarity and stimulate thirst when osmolarity rises.
E. Mechanoreceptors: Respond to mechanical changes like pressure or stretch, not osmolarity.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
A. Trophoblast: Part of the blastocyst that contributes to placenta formation, not the whole developing individual.
B. Zygote: Single-cell stage immediately after fertilization.
C. Blastocyst: The hollow ball of cells that implants around day 6–7; occurs before week 3.
D. Embryo: The developing human is called an embryo from week 3 through week 8. This is when organ systems begin to form.
E. Fetus: The term "fetus" applies after week 8, when organogenesis is largely complete.
Correct Answer is B
Explanation
A. It participates in muscle contraction: Calcium binds to troponin, enabling contraction.
B. It is a significant component of nucleic acids: Calcium is not a structural part of DNA or RNA; phosphate is.
C. They serve as second messengers: Calcium ions act as second messengers in various signaling pathways.
D. It activates exocytosis: Calcium triggers neurotransmitter and hormone release by promoting vesicle fusion.
E. It is important in blood clotting: Calcium is essential for several steps in the coagulation cascade.
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