Biological Science (7th Edition)
7th Edition
ISBN: 9780134678320
Author: Scott Freeman, Kim Quillin, Lizabeth Allison, Michael Black, Greg Podgorski, Emily Taylor, Jeff Carmichael
Publisher: PEARSON
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Textbook Question
Chapter 43, Problem 3TYK
In a neuron, what creates the
a. Na+/K+-ATPase
b. voltage-gated K+ channels
c. voltage-gated Na+ channels
d. ligand-gated Na+/K+ channels
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At 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.
The presence of an electrical gradient is responsible for both the resting membrane potential and the action potential in the neuron.a. In this case who is responsible for maintaining the electric gradient to produce a potential for the resting membrane?b. Explain what is meant by an electrical gradient in the context of a cell (neuron)!
In the membrane of a neuron, what happens during an IPSP? A. All the ion gates in the membrane close. B. The sodium gates open. C. The potassium or chloride gates open. D. All the ion gates in the membrane open.
Chapter 43 Solutions
Biological Science (7th Edition)
Ch. 43 - In a neuron, what creates the electrochemical...Ch. 43 - Prob. 4TYKCh. 43 - Explain the difference between a ligand-gated K+...Ch. 43 - Prob. 6TYUCh. 43 - Prob. 7TYUCh. 43 - Prob. 8TYUCh. 43 - Prob. 9TYPSSCh. 43 - Alzheimer’s disease is a common form of dementia...Ch. 43 - Prob. 11PIATCh. 43 - Prob. 12PIAT
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- When the neuron’s membrane is at rest, where are the sodium ions and potassium ions most concentrated?A. Sodium is mostly outside and potassium is mostly inside.B. Sodium is mostly inside and potassium is mostly outside.C. Both ions are mostly inside the cell.D. Both ions are mostly outside the cell.arrow_forwarda) How does E allow faster transmission of signals? b) What would happen if G has a lack of Calcium? c) Most neurons have the style of junction (chemical) shown in the diagram, rather than gap (electrical) junctions. Why does this make sense?arrow_forwardWhich one of these is an example of an excitatory postynaptic potential in a typical neuron? a) A voltage change from -70mV to -70.5mV b) A voltage change from +35mV to 0MV c) A voltage change from 0mV to +0.35mV d) A voltage change from -69.5mV to -70mVarrow_forward
- A motor neuron: a) transmits nerve impulses to the brain. b) is very short. c) transmits nerve impulses out of the brain and spinal cord. d) transmits nerve impulses to muscles only. Use the illustration below to answer questions 7 and 8. 7. Which number represents a dendrite? a) 1 b)2 c)3 d)4 e)5 8. What number represents the myelin sheath? a)1 b)2 c)3 d)4 e)5 9. At rest, a neuron is: a) Polarized b) Depolarized c) Green 10. Certain phenomena can be observed in a person running. What causes the runner's breathing rate to increase. a) The cells produce more CO2. b) The cells make more urea. c) The cells release more energy. d) The cells have a greater need for glucose.arrow_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_forwardWhere are neurotransmitter receptors located?(A) the nuclear membrane(B) the nodes of Ranvier(C) the postsynaptic membrane(D) synaptic vesicle membranesarrow_forward
- Draw a simple schematic of a neuron and label its parts. Where does “information” usually go in and through which structure is it passed on? Where is the action potential generated?arrow_forwardWhat membrane protein of the neuron is responsible for briefly increasing the Na+ permeability of the membrane during the rising phase of the nerve impulse? a. the sodium-potassium pump b. the voltage gated potassium channel c. the voltage gated sodium channel d. the stimulus gated sodium channel e. the ligand gated ion channelarrow_forwardExplain how the sodium–potassium pump and the properties of the membrane lead to the resting potential of a neuron.arrow_forward
- Which best defines depolarization? A. At first polarity is reversed the continues until the potential difference across the membrane is eliminated. B.None C.It reestablishes the resting potential. D. At first eliminates the potential difference across the membrane then continues until the polarity is actually reversed.arrow_forward• Bundles of neurons that carry information to and from the central nervous system are called A. Nerves B. Interneurons C. Myelin sheath D. Glia • The attraction of the opposite charges across the plasma membrane is a potential energy, the charge difference, or the voltage is called _______________. A. Summation B. Membrane potential C. Resting potential D. Depolarizationarrow_forwardA patch-clamp device is used to a. Study the properties of individual neurotransmitters b. Study the properties of individual membrane channels c. Measure the strength of an electrochemical gradient d. Infuse different kinds of ions into an axonarrow_forward
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