Which of the following is/are scalar quantity(ies)?
A. distance
B. speed
C. displacement
D. both A & B
D. both A & B
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RNA is
A. single-stranded and contains thymine.?B. single-stranded and contains uracil.?C. double-stranded and contains thymine.?D. double-stranded and contais uracil.
The posterior pituitary hormone that is crucial for milk ejection is
A. LH. B. GnRH. C. oxytocin. D. prolactin. E. progesterone.
The __________ respiratory group in the medulla sends messages to motor neurons that stimulate the diaphragm and external intercostal muscles.
Fill in the blank(s) with the appropriate word(s).
Before parturition,
A. the placenta secretes increased amounts of oxytocin. B. the uterus stretches, causing the release of ACTH from the adenohypophysis. C. there is an increase in the stimulatory effects of progesterone on the uterine muscle. D. prostaglandin synthesis is inhibited. E. fetal glucocorticoids decrease the production of progesterone by the placenta.