Which of the following represents a reactant in the light reaction of photosynthesis?
A. H2O
B. carbon dioxide
C. ATP
D. NADPH
E. oxygen
A. H2O
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The most accurate description of SPATIAL summation is
A. Several inputs from DIFFERENT presynaptic cells create EPSPs that sum together to bring the neuron over the threshold for an action potential. B. Several inputs from the SAME presynaptic cell arrive in rapid succession, summing into a larger depolarization that brings the neuron over the threshold for an action potential.
The critical function of the sodium-potassium pump of neurons is to move
A. Na+ and K+ into the cell. B. Na+ and K+ out of the cell. C. Na+ into the cell and K+ out of the cell. D. Na+ out of the cell and K+ into the cell. E. Na+ and K+ into the cell and H+ out of the cell through an antiport mechanism.
Describe how DNA packing occurs in eukaryotes using the terms nucleosome, 30 nm fiber,
euchromatin, and heterochromatin. Then describe how DNA is packed in prokaryotes.
What will be an ideal response?Prolactin
a. stimulates the mammary glands to produce milk. b. is the only hormone to affect mammary glands. c. causes the development of breasts and other secondary sexual characteristics in the male. d. acts in concert with FSH to produce milk. e. has secondary effects on reducing the size of the uterus after birth.