The only receptors to make direct contact with brain interneurons rather than afferent neurons are
a. olfactory receptors.
b. taste receptors.
c. chemoreceptors.
d. mechanoreceptors.
e. photoreceptors.
A
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True or false: The benefit of asymmetric meiotic division during oogenesis is that it allows most of the cytoplasm to be retained in a single cell
A. true B. false
If genes A, B and C independently assort, what type(s) of gametes would a parent with the aaBbCC genotype make?
a) aaBbCC b) aBC only c) abC only d) aBC or abC
Opening all of the sodium channels on an otherwise typical neuron, with all other ion channels closed (which is an admittedly artificial setting), should move its membrane potential to _____
A) -90 mV B) 0 mV C) +30 mV D) +62 mV
A cytologist is examining a tissue under an electron microscope. He notices that the endoplasmic reticulum of each cell is extremely rough in appearance and he knows that the rough appearance is because of the ribosomes embedded there. He asks why there are so many ribosomes. You respond,
A. "This tissue exports lipids and is very involved with mRNA production." B. "This tissue exports proteins to other areas of the body." C. "This tissue exports various nucleic acids, hence the large number of ribosomes present on the endoplasmic reticulum in each of those cells."