When a nerve impulse travels from neuron 1 to neuron 2, neuron 1 is known as the _____
a. postsynaptic neuron
b. presynaptic neuron
c. synapse
d. gated channel
e. dendrite
b
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Which of the following is true of chemical synapses? Select all correct choices
A. They are more common than electrical synapses. B. Their vesicles fuse with the presynaptic membrane to release neurotransmitters. C. Once released, their neurotransmitter molecules may return to the presynaptic cell.
A test offered on the Web by a direct-to-consumer genetic testing company genotypes a gene for ability to taste bitter substances. This test is not regulated by the Clinical Laboratory Improvement Amendments (CLIA) because
A) the test is not expensive. B) the test provides information, not a diagnosis. C) the test is offered in a state of the U.S. not covered by these regulations. D) the Genetic Information Nondiscrimination Act outlawed CLIA. E) it is not accurate.
The BRCA1 and BRCA2 genes both function in the process of ____________________. Fill in the blank(s) with the appropriate word(s)
Oxidative phosphorylation requires all of the items listed below except
A) ATP synthase in the correct position in the membrane. B) enzyme complexes embedded in a membrane. C) the flow of electrons from NADH and QH2 in the membrane. D) a matrix more positively charged than the intermembrane space. E) a terminal electron acceptor which is O2 in mitochondria.