Which of the following is NOT known to be an important neurotransmitter in the CNS?
A. Morphine
B. Dopamine
C. Acetylcholine
D. Substance P
E. Glutamate
Answer: A
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Which of the following hormones is important in the regulation of sodium ion concentrations in the extracellular fluid?
A) erythropoietin B) antidiuretic hormone C) renin D) aldosterone
What would happen to the alveoli if surfactant were not produced?
A) The air exchange across with blood air barrier would improve because surfactant did not block any diffusion. B) The alveoli would become invaded by pathogens because surfactant was not there to block the pathogens. C) The alveoli would stiffen because surfactant lubricates the alveoli to they can expand. D) The alveoli would collect fluid because surfactant normally soaks up extra fluid and prevents it from accumulating in the lungs. E) The alveoli would collapse because of the normally high surface tension of the water coating the alveolar surfaces.
Which type of follicle will stop secreting hormones after two weeks if the egg is not fertilized?
A. Corpus luteum B. Primordial C. Graafian D. None of these are correct.
What is the approximate duration of the fetal period of development?
A. 12 weeks B. 29 weeks C. 39 weeks D. 4 weeks