A likely biological basis of major depressive disorder is
A) reuptake pumps for serotonin in the presynaptic neuron membrane that are overactive, depleting serotonin in the synapse.
B) absent reuptake pumps for serotonin in the presynaptic neuron membrane.
C) reuptake pumps for serotonin in the postsynaptic neuron membrane that do not function adequately.
D) reuptake pumps for serotonin in the postsynaptic neuron membrane that are overactive, depleting serotonin in the synapse.
A) reuptake pumps for serotonin in the presynaptic neuron membrane that are overactive, depleting serotonin in the synapse.
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The largest mass of living material on Earth comes from
A) microorganisms. B) plants. C) animals. D) plants and animals together.
What happens to a male's reproductive organ development when the SRY gene is mutated and not expressed?
a. Male reproductive organs will develop normally. b. Male reproductive organs, included testes, will develop but testosterone will not be produced. c. Female reproductive organs will develop. d. The reproductive organs will remain immature. e. Portions of both the male and female reproductive organs will develop.
Fast-growing algae are prevented from out competing corals due to:
a. low nutrients inhibiting their growth. b. grazing on algae by herbivores. c. sensitivity to pressure increasing with depth. d. damselfish activity. e. b and d
Which of the following statements about the notochord is false?
a. It is lost when it is replaced by the vertebral column. b. It develops in chordate embryos. c. It develops from mesodermal tissue. d. It induces formation of the neural plate. e. It grows along the longitudinal axis of the organism