Campbell Biology in Focus
3rd Edition
ISBN: 9780134710679
Author: Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Rebecca Orr
Publisher: PEARSON
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Textbook Question
Chapter 37, Problem 6TYU
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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Students have asked these similar questions
Postsynaptic potentials are graded potentials that develop in the postsynaptic membrane. Which one of the following statements accurately describes what causes EPSP's to occur at the postsynaptic membrane?
Group of answer choices
A.an EPSP results from the opening of voltage gated sodium channels
B.an EPSP results from the opening of chemically gated sodium channels
C.an EPSP results from the opening of voltage gated potassium channels
D.an EPSP results from the opening of chemically gated potassium channels
All of the following statements correctly describe a polarized membrane EXCEPT which?
a. There is a separation of the charge by a membrane, resulting in its ability to do work.
b. An RMP of –60 mV indicates that there are more positive ions inside the axon than an RMP of –70 mV.
c. A resting membrane potential (RMP) of –90 mV indicates the there are more positive ions inside the axon than an RMP of –70 mV.
d. There is a difference in the charges found on the inside of the membrane to the outside.
Fill out the following table (the 2 columns on the left)
LTP LTD
Is the following directly associated with the induction of LTP, LTD, both or
neither (check both if both apply, and leave blank if neither apply)?
a. Increased activity of phosphatase I
b. Increased levels of presynaptic Ca²+
c. Postsynaptic hyperpolarization
d. Removal of AMPA receptors from the postsynaptic membrane
e. Postsynaptic depolarization
f. Increased levels of postsynaptic Ca²+
g. Insertion of AMPA receptors into the postsynaptic membrane
h. Presynaptic hyperpolarization
Chapter 37 Solutions
Campbell Biology in Focus
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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- Imagine a neuron receiving twice the number of inhibitory postsynpatic potentials as excitatory postsynpatic potentials. Calcium levels inside the axon terminus of this neuron would be Select one: a. Low b. Higharrow_forward+70 D A -70 Time in msec The diagram above shows the changes in membrane potential measured from a single point in a typical mammalian motor neuron that has been artificially stimulated to threshold. Membrane potential in mV Barrow_forwardIn a chemical synapse,a. action potentials in the presynaptic terminal cause voltage-gatedCa2+channels to open.b. neurotransmitters can cause ligand-gated Na+ channels to open.c. neurotransmitters can be broken down by enzymes.d. neurotransmitters can be taken up by the presynaptic terminal.e. All of these are correct.arrow_forward
- In the hippocampus, when glutatmate is released into the synaptic cleft, but the postsynaptic cell is NOT depolarized, there is only a small postsynaptic response. Why is this the case? A. Ca++ ions block the NMDA ion channel B. Mg++ ions block the NMDA ion channel C. Glutamate is an inhibitory amino acid neurotransmitter D. There are no NMDA receptors on the postsynaptic cellarrow_forwardRelatively high velocity (speed) action potential propagation is a feature of axons that have which of the following: a. additional mitochondria b. reduced absolute refractory period c. fewer potassium channels d. a myelin sheath Which effect listed below would characterize the drug as a serotonin agonist? a. Stimulating monoamine oxidase to reduce available serotonin b. Binding and activating a postsynaptic serotonin receptor c. Increasing the efficiency of a serotonin transporterarrow_forwardWhich of the following is true about the conduction of action potentials? a. Thicker axons are faster because there is more surface area on thicker axons. b. Myelin speeds conduction because the glial cells add voltage gated Na+ channels to the neuron. c. Diffusion of Na+ ions between the Nodes of Ranvier happens faster than the wave of opening and closing membrane proteins can travel. d. Neurons that don’t have myelin sheaths undergo saltatory conduction e. Action potentials move slowly.arrow_forward
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