An organism that maintains its internal environment regardless of changes in the external environment is called a __________
Fill in the blank with correct word
Answer:
regulator
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Prostaglandins are _________ acids that ___________ the cervix
A. amino; constrict B. amino; dilate C. fatty; constrict D. fatty; dilate
Which of the following concerning olfaction is true?
A) Olfactory receptors are highly modified neurons. B) Molecules to be smelled cannot be dissolved first in mucus. C) Humans have fewer than 10,000 olfactory receptors. D) Human power of olfaction is as powerful as that of most other mammals. E) Olfactory stimuli must pass through the thalamus before journeying to the olfactory cortex.
Which of the following statements concerning control of ovarian hormone secretion is incorrect?
a. Low levels of estrogen inhibit the hypothalamus and anterior pituitary in negative-feedback fashion. b. Under the influence of estrogen from developing follicles, FSH and LH secretion both continue to decline throughout the follicular phase. c. Both estrogen and progesterone are required to completely inhibit tonic LH secretion. d. A high level of estrogen stimulates LH secretion and initiates the LH surge. e. Progesterone powerfully inhibits both FSH and LH secretion.
The most common bacterial STD is ________.
Fill in the blank(s) with the appropriate word(s).