Cocaine can potentially cause convulsions because:a
the drug increases the clearance of neurotransmitter from the synaptic cleft.
b. the drug decreases the amount of neurotransmitter in the synaptic cleft.
c. the drug binds to postsynaptic receptors and stimulates depolarization.
d. the drug decreases intracellular calcium levels and therefore blocks release of
neurotransmitter.
e. blocks the reuptake of neurotransmitters from the synaptic cleft
E
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The cytoplasmic space in eukaryotic cells is occupied by many diverse membrane-bound structures with specific cellular functions called:
A. flagella. B. organelles. C. receptors. D. cilia. E. chromosomes.
An animal’s fight-or-flight response is controlled by which of the following?
a. sympathetic nervous system b. frontal lobe c. parasympathetic nervous system d. occipital lobe
Which of the following is an example of an
event that would set up the scene for primary succession?
a. a dense landslide of mountain rocks covering an entire valley b. a fire that burns off all of the surface vegetation c. an agricultural field that is abandoned d. a lake that dries up killing all of the aquatic plants e. all of these set the scene for secondary succession NOT primary succession
________ are hormones that act locally, affecting neighboring cells.
A. Prostaglandins B. Oxytocin C. Insulin D. Pheromones E. Oxytocin and pheromones are both correct.