BIOLOGY
12th Edition
ISBN: 9781260169614
Author: Raven
Publisher: RENT MCG
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Textbook Question
Chapter 42, Problem 1U
Which of the following best describes the electrical state of a neuron at rest?
a. The inside of a neuron is more negatively charged than the outside.
b. The outside of a neuron is more negatively charged than the inside.
c. The inside and the outside of a neuron have the same electrical charge.
d. Potassium ions leak into a neuron at rest.
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Which of the following best describes the electrical state of a neuron at rest?
a. The inside of a neuron is more negatively charged than the outside.
b. The outside of a neuron is more negatively charged than the inside.
c. The inside and the outside of a neuron have the same electrical charge.
d. Potassium ions leak into a neuron at rest.
A 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 neuron
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.
Chapter 42 Solutions
BIOLOGY
Ch. 42.1 - Differentiate between subdivisions of the...Ch. 42.1 - Prob. 2LOCh. 42.1 - Explain the roles of the different nervous system...Ch. 42.2 - Contrast the relative concentrations of important...Ch. 42.2 - Prob. 2LOCh. 42.2 - Prob. 3LOCh. 42.3 - Prob. 1LOCh. 42.3 - Prob. 2LOCh. 42.3 - Prob. 3LOCh. 42.4 - Prob. 1LO
Ch. 42.4 - Prob. 2LOCh. 42.4 - Prob. 3LOCh. 42.5 - Describe the organization of the peripheral...Ch. 42.5 - Prob. 2LOCh. 42.5 - Prob. 3LOCh. 42.5 - Prob. 4LOCh. 42 - Data analysis Draw the resulting potentials for...Ch. 42 - Prob. 2DACh. 42 - Which of the following best describes the...Ch. 42 - The ____ cannot be controlled by conscious...Ch. 42 - Prob. 3UCh. 42 - Inhibitory neurotransmitters a. hyperpolarize...Ch. 42 - White matter is ______, and gray matter is...Ch. 42 - During an action potential a. the rising phase is...Ch. 42 - Prob. 7UCh. 42 - Imagine that you are doing an experiment on the...Ch. 42 - The Na+/K+ ATPase pump is a. not required for...Ch. 42 - Prob. 3ACh. 42 - The following is a list of the components of a...Ch. 42 - Prob. 5ACh. 42 - As you sit quietly reading this sentence, the part...Ch. 42 - G proteincoupled receptors are involved in the...Ch. 42 - Tetraethylammonium (TEA) is a drug that blocks...Ch. 42 - Describe the status of the Na+ and K+ channels at...Ch. 42 - Describe the steps required to produce an...Ch. 42 - Prob. 4S
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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
- Which 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_forwardWhen 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_forwardThe 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)!arrow_forward
- 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.arrow_forwardWhen a neuron is at rest, the inside of the cell A has a slight negative charge relative to the outside B has no charge C has a slight positive charge relative to the outside D has a charge identical to the outsidearrow_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_forward
- When a neuron is inactive, more of which of the following exist OUTSIDE the neuron? A. Myelin sheaths B. Positive ions C. Neuropeptides D. Negative ionsarrow_forwardDraw 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_forwardWhich bulb shaped structures found at the end of neurons form connections with the dendrites and somas of other neurons and allow information to pass from one neuron to another? A. Myelin sheaths B. Ion channels C. Axon terminals D. Dendrite arcsarrow_forward
- What 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_forwardA 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_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_forward
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