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Ch. 48 - Neurons, Synapses, and Signaling
All textbooksCampbell 12th EditionCh. 48 - Neurons, Synapses, and SignalingProblem 3
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Chapter 48, Problem 3

Where are neurotransmitter receptors located? a. the nuclear membrane b. the nodes of Ranvier c. the postsynaptic membrane d. synaptic vesicle membranes

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Hello everyone here We have a question that say neurotransmitters located in the blank are signaling molecules that cross the synapse and bind to blank cell bodies and except ear's. That is incorrect. Be dendrites and reactors. That is incorrect. See axon terminals and receptors neurotransmitters located in the axon terminals which are stored in the synaptic vesicles are signaling molecules that cross the synapse and bind to receptors. That is correct. The cell body and receptors. That is incorrect. So our answer here is C. Axon terminals and receptors. Thank you for watching. Bye.
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Textbook Question

What happens when a resting neuron's membrane depolarizes? a. There is a net diffusion of Na+ out of the cell. b. The equilibrium potential for K+(EK) becomes more positive. c. The neuron's membrane voltage becomes more positive. d. The cell's inside is more negative than the outside.

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Textbook Question

A common feature of action potentials is that they a. cause the membrane to hyperpolarize and then depolarize. b. can undergo temporal and spatial summation. c. are triggered by a depolarization that reaches threshold. d. move at the same speed along all axons.

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Textbook Question

Why are action potentials usually conducted in one direction? a. Ions can flow along the axon in only one direction. b. The brief refractory period prevents reopening of voltage-gated Na+ channels. c. The axon hillock has a higher membrane potential than the terminals of the axon. d. Voltage-gated channels for both Na+ and K+ open in only one direction.

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Textbook Question

Which of the following is the most direct result of depolarizing the presynaptic membrane of an axon terminal? a. Voltage-gated calcium channels in the membrane open. b. Synaptic vesicles fuse with the membrane. c. Ligand-gated channels open, allowing neurotransmitters to enter the synaptic cleft. d. An EPSP or IPSP is generated in the postsynaptic cell.

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Textbook Question

Suppose a particular neurotransmitter causes an IPSP in postsynaptic cell X and an EPSP in postsynaptic cell Y. A likely explanation is that a. the threshold value in the postsynaptic membrane is different for cell X and cell Y. b. the axon of cell X is myelinated, but that of cell Y is not. c. only cell Y produces an enzyme that terminates the activity of the neurotransmitter. d. cells X and Y express different receptor molecules for this particular neurotransmitter.

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