Campbell Biology In Focus, Loose-leaf Edition (3rd Edition)
3rd Edition
ISBN: 9780134895727
Author: Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky
Publisher: PEARSON
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Chapter 37, Problem 3TYU
Summary Introduction
Introduction:
Neurotransmitter receptors are the regions that receive signals and then help in triggering the action potentials.
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What does a transporter protein do at a synapse? a. It carries neurotransmitter molecules from the presynaptic neuron to the postsynaptic neuron. b. It carries neurotransmitter molecules from the cell body to the presynaptic terminal. c. It carries neurotransmitter molecules from neurons that have too much into neurons that need more. d. It pumps used neurotransmitter molecules back into the presynaptic neuron.
Lidocaine is an anesthetic that is used to prevent the propagation of action potentials. Which compartment would lidocaine MOST likely target?
A. axon
B. dendrite
C. soma
D. synaptic cleft
A channel opens on a postsynaptic membrane that causes a negative ion to leave the cell. What type of graded potential is this?
a. depolarizing
b. repolarizing
c. hyperpolarizing
d. non-polarizing
Chapter 37 Solutions
Campbell Biology In Focus, Loose-leaf Edition (3rd Edition)
Ch. 37.1 - Prob. 1CCCh. 37.1 - Describe the basic pathway of information flow...Ch. 37.1 - WHAT IF? How might increased branching of an axon...Ch. 37.2 - Under what circumstances could ions flow through...Ch. 37.2 - WHAT IF? Suppose a cells membrane potential shifts...Ch. 37.2 - Prob. 3CCCh. 37.3 - How do action potentials and graded potentials...Ch. 37.3 - In multiple sclerosis (from the Greek skleros,...Ch. 37.3 - Prob. 3CCCh. 37.3 - WHAT IF? Suppose a mutation caused gated sodium...
Ch. 37.4 - Prob. 1CCCh. 37.4 - Organophosphate pesticides work by inhibiting...Ch. 37.4 - MAKE CONNECTIONS Name one or more membrane...Ch. 37 - What happens when a resting neuron's membrane...Ch. 37 - Prob. 2TYUCh. 37 - Prob. 3TYUCh. 37 - Why are action potentials usually conducted in one...Ch. 37 - Which of the following is a direct result of...Ch. 37 - Suppose a particular neurotransmitter causes an...Ch. 37 - Prob. 7TYUCh. 37 - Prob. 8TYUCh. 37 - DRAW IT Suppose a researcher inserts a pair of...Ch. 37 - Prob. 10TYUCh. 37 - FOCUS ON EVOLUTION An action potential is an...Ch. 37 - Prob. 12TYUCh. 37 - SYNTHESIZE YOUR KNOWLEDGE The rattlesnake alerts...
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- Answer the question :arrow_forwardWhat happens to the membrane potential of a neuron when an action potential is stimulated? A. The membrane potential goes from positive to negative. B. The membrane potential remains positive. C. The membrane potential goes from negative to positive. D. The membrane potential remains negative.arrow_forwardCell membranes can maintain a difference in electrical charge between the inte- rior of the cell and the extracellular fluid. What is this charge difference called? A. excitability B. the membrane potential C. the action potential D. the sodium-potassium pumparrow_forward
- What is myelin? A. Projection on a neuron cell body that is sensitive to stimuli B. Another name for the cell body of a neuron C. A membrane wrapping on an axon that increases the speed of action potential propogation D. A long, slender process of a neuron that is capable of conducting nerve impulsesarrow_forwardA neuron may receive signals from thousands of synaptic terminals. What determines whether the receiving neuron will respond by transmitting a signal? a. the concentration of transmitter inside the receiving neuron b. the summation of excitatory and inhibitory signals received c. the number of glial cells contact the receiving neuronarrow_forwardUse this illustration to place these events in the order they occur during synaptic communication: Column A Column B a. Voltage gated sodium channels carry the action potential to the synapse by allowing the influx of sodium ions. 1. 1 2 b. An increase in calcium levels triggers vesicle release. 3. 3 c. Sodium enters the post-synaptic cell, causing it to depolarize. 4. 4 d. Sodium influx at the synapse activates voltage gated 5. calcium channels which allow calcium ions to enter the presynaptic neuron. 6. 6. e. Neurotransmitters are released into the synaptic cleft. f. Ligand-gated ion channels are opened by the neurotransmitters. 2.arrow_forward
- The nerve impulses always travel in one direction from dendrites to axon terminals. What prevents an action potential from travelling backward? a. Hyperpolarization of the neuron makes the membrane more positive and prevents another action potential. b. After repolarization, the refractory period occurs, where the sodium ions are found outside the cell. c. After repolarization, the reversal of ions prevents another action potential as there would not be enough sodium ions outside the cell to rush in. d. The refractory period prevents another action potential by lowering the threshold potential.arrow_forwardAt rest, a neuron has a lower concentration of sodium than the surrounding fluid. When a neuron sends a signal, it opens sodium channels. What happens to the sodium when the sodium channels open? A. The sodium diffuses out of the cell. B. The sodium is pumped into the cell. C. The sodium is pumped out of the cell. D. The sodium diffuses into the cell.arrow_forwardAndrew was taken to the doctor’s office after he was bitten by a stray dog. The concern was that the dog might be infected with the rabies virus. The rabies virus infects neurons by using which method that normally transports materials from the synaptic knob to the cell body? a. anterograde transport b. fast axonal transport c. slow axonal transport d. All of these are correct.arrow_forward
- Schwann cells have a function in the PNS that is similar to that of which cells in the CNS? Group of answer choices a.Oligodendrocytes b.Astrocytes c.Microglia d.Ependymal cellsarrow_forwardNeurotransmitters: a. Can only inhibit the postsynaptic cell b. Can be part of a process that regulates transcription and translation in the postsynaptic cell с. Are bound to their receptors forever, until the receptor is degraded and recycled. d. Can exit the presynaptic cell without assistance. e. Can only excite the postsynaptic cell Clathrin: Is embedded in the cell membrane of the synaptic terminal. a. b. Degrades vesicles for recycling and return to the axon hillock с. Mediates ALL endocytosis in the body, including the formation of vesicles in the synapse. d. Forms a coat of octagonal proteins. e. Helps the vesicle leave the pre-synaptic cell, and fuse to the membrane of the post-synaptic cellarrow_forwardWhere does collateral sprouting take place? a. In the cell body b. In the axon c. In the dendrites d. In both the axons and the dendritesarrow_forward
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