At rest, a neuron has a lower concentration of sodium than the surrounding fluid. When a neuron sends asignal, 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.O C. The sodium is pumped out of the cell.O D. The sodium diffuses into the cell.nsweredMacBook Air20F3F5@$%&*2678WER

All capacities performed by the sensory system—from a basic engine reflex to further developed…

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? O A. The sodium diffuses out of the cell. O B. The sodium is pumped into the cell. O C. The sodium is pumped out of the cell. O D. The sodium diffuses into the cell.

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? O A. The sodium diffuses out of the cell. O B. The sodium is pumped into the cell. O C. The sodium is pumped out of the cell. O D. The sodium diffuses into the cell.

Biology (MindTap Course List)

11th Edition

ISBN:9781337392938

Author:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg

Publisher:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg

Chapter41: Neural Signaling

Section: Chapter Questions

Problem 9TYU

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Neurons contain ________, which can receive signals from other neurons. a. axons b. mitochondria c. dendrites d. Golgibodies
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.
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.
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.
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
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?
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 channel
When a neuron is at rest,_____ . a. it is at threshold potential b. voltage-gated sodium channels are open c. sodium–potassium pumps are operating d. it contains more sodium ions than the surrounding interstitial fluid
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.
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 -70mV
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)!
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.