What information can a simple stain give you?
What will be an ideal response?
Ans: Simple stains are used to determine cell shape, size, and arrangement.
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The effect of parathyroid hormone on blood chemistry is most directly opposed by the effect of
a. Thyroid-stimulating hormones. b. thyroxin. c. calcitonin. d. melatonin. e. cortisol.
When an embryo partially splits after day 12 of development what arises?
a. fraternal twins b. triplets c. a fetus with extra limbs d. conjoined twins e. fetus in fetu
Some drugs modulate the activity of ion channels. For example, Novocain somewhat inhibits the opening of sodium channels. What happens to the threshold of a sensory neuron if this drug is used?
A) It will take less stimulation to reach threshold. B) The nerve will not function and will die off. C) Threshold will not change. D) It will take more stimulation to reach threshold.
Which organ does not produce steroid hormones?
A. testes B. ovaries C. adrenal cortex D. pineal gland