Biology (MindTap Course List)
11th Edition
ISBN: 9781337392938
Author: Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg
Publisher: Cengage Learning
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Chapter 41, Problem 3TYU
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3. Which of the following occurs first when voltage reaches the threshold level in a neuron plasma membrane? (a) voltageactivated Na+ channels open (b) K+ channels open (c) the membrane hyperpolarizes (d) neurotransmitter is released (e) K+ channels close
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Students have asked these similar questions
The membrane potential labeled (4) is due to which of the following?
(A) voltage-gated Na+ channels
(B) voltage-gated K+ channels
(C) voltage-gated slow Ca++ channels
(D) voltage-gated fast Ca++ channels
(E) voltage-gated transient Ca++ channels
(F) funny channels
The membrane potential labeled (0) is due to which of the following (when compared to (3) potential.
(A) voltage-gated Na+ channels
(B) voltage-gated K+ channels
(C) voltage-gated slow Ca++ channels
(D) voltage-gated fast Ca++ channels
(E) voltage-gated transient Ca++ channels
(F) funny channels
Inhibitory post synaptic membrane potential - Data
Cl-
Cl-
Nr of GABA
inside
Max Postsynaptic
Voltage (mV)
outside
receptors
140
20
hel-89-
00
140
20
- 34.428
140
40
- ףQLL-b
Questions
11. What is an IPSP?
12. GABA receptors on the postsynaptic neuron function as ion channels for which
ion?
13. Based on the data collected, when is it more possible for an action potential to
occur? When the intracellular Cl- concentration in the postsynaptic neuron increases
or when the number of GABA receptors on the postsynaptic membrane increases?
14. Explain
Chapter 41 Solutions
Biology (MindTap Course List)
Ch. 41.1 - Describe the processes involved in neural...Ch. 41.1 - Prob. 1CCh. 41.1 - Prob. 2CCh. 41.2 - Draw and label a typical neuron and give the...Ch. 41.2 - Prob. 3LOCh. 41.2 - Prob. 1CCh. 41.2 - Prob. 2CCh. 41.2 - Prob. 3CCh. 41.3 - Prob. 4LOCh. 41.3 - Prob. 5LO
Ch. 41.3 - Prob. 6LOCh. 41.3 - Prob. 1CCh. 41.3 - Prob. 2CCh. 41.3 - Prob. 3CCh. 41.3 - Prob. 4CCh. 41.4 - Prob. 7LOCh. 41.4 - Prob. 8LOCh. 41.4 - Prob. 9LOCh. 41.4 - Prob. 1CCh. 41.4 - Prob. 2CCh. 41.4 - How are EPSPs produced? IPSPs?Ch. 41.5 - Prob. 10LOCh. 41.5 - Prob. 1CCh. 41.5 - Prob. 2CCh. 41.5 - Prob. 3CCh. 41.6 - Prob. 11LOCh. 41.6 - Prob. 1CCh. 41 - Test Your Understanding Know and Comprehend 1....Ch. 41 - Prob. 2TYUCh. 41 - Test Your Understanding Know and Comprehend 3....Ch. 41 - Saltatory conduction (a) requires more energy than...Ch. 41 - Receptors for serotonin and many other...Ch. 41 - A presynaptic neuron in the cerebrum transmits...Ch. 41 - VISUALIZE Describe the action taking place at each...Ch. 41 - Prob. 8TYUCh. 41 - Prob. 9TYUCh. 41 - Prob. 10TYUCh. 41 - Prob. 11TYUCh. 41 - Prob. 12TYUCh. 41 - Prob. 13TYU
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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
- Watch this video (http://openstaxcollege.org/l/summation) to learn about summation. The process of converting electrical signals to chemical signals and back requires subtle changes that can result in transient increases or decreases in membrane voltage. To cause a lasting change in the target cell, multiple signals are usually added together, or summated. Does spatial summation have to happen all at once, or can the separate signals arrive on the postsynaptic neuron at slightly different times? Explain your answer.arrow_forwardPart 2- The Function of the Nervous System Use the information in your lecture slides and handouts to answer the following questions about the function of the nervous system (A) Label the parts of the neuron indicated below (B) Indicate using an arrow the direction an electrical impulse would move during synaptic transmission Тext (the inner part) (the outer part) neuron (cell body) (C) In the space provided, write the letter of the description that best matches the term or phrase.arrow_forwardWhich of the following occurs first when voltage reaches the threshold level in a neuron plasma membrane? (a) voltageactivated Na1 channels open (b) K1 channels open (c) the membrane hyperpolarizes (d) neurotransmitter is released (e) K1 channels closearrow_forward
- Neuron anatomy model - a spinal multipolar neuron • Dendrites ● Terminal ends of presynaptic neurons • Some(cell body) ● Nucleus and nucleolus Nissl (bodies) also called chromatophilic substances 0 • Neurofibrils ● Mitochondria Axolemma ● Endoneurium ● Axon Myelin with nodes of Ranvier (neurofibril nodes)arrow_forwardReceptors for serotonin and many other neurotransmitters (a) are voltage-activated ion channels (b) permit influx of chloride ions, leading to depolarization (c) inhibit EPSPs (d) are ligand-gated channels (e) are passive ion channelsarrow_forward(a) Membrane potential (mv) (b) Relative membrane permeability 80 -70 600 300 100 PN O Resting membrane potential Na 2° Threshold potential Voltage-gated Na channels Voltage-gated K channels Time (msec)arrow_forward
- Action Potential of Neurons Worksheet 1. Explain how an action potential and graded potential are different. Where do they occur on a neuron? How long does each last? What kind of gates is each process using? 2. Describe the following in your own words a. resting potential C. hyperpolarization e. threshold 9. 3. What triggers an action potential? What happens to the membrane to trigger an action potential? 4. What is a positive feedback loop? How does a neuron create a positive feedback loop (self- propagation) 5. What is the role of the voltage-gated sodium channels for producing an action potential? 6. What is the role of the voltage-gated potassium channels? 7. What would happen if the voltage gated sodium channels a. Never opened? b. Stayed open longer than normal? 8. What is the absolute refractory period? What is the relative refractory period? Consider the following three diagrams of a nerve cell membrane. They show resting potential, depolarization, and hyperpolarization.…arrow_forward1. The graph above represent time in milliseconds. At what time (in milliseconds) is the inside of the neuron the most positive and why? 2. Explain why the membrane potential changes at X 3. Explain what is happening at point C to the sodium and potassium ions and how this is affecting the membrane potential 4. Describe two things that contribute to the resting membrane potentialarrow_forwardAction Refractory potential period 50 6. 50 9. 5. -10. -100 2 3 4 Time (milliseconds) 1 5 6 7 Action Potential in a Neuron Place the number from the graph that matches the description in the blank below. The voltage gated sodium channels are open. The threshold level of the neuron is represented by the number: The sodium channels have closed. The potassium channels are open and potassium ions are flowing out. The potassium channels are slow to close. The membrane potential is more negative than the resting membrane potential. Membrane Potential (mV)arrow_forward
- During an Action Potential….. _____ Na+ flows out of the cell _____ Na+ activation gates and inactivation gates are both open _____ Na+ flows into the cell _____ Calcium flows out of the cell _____ K + gates are open _____ Na+ activation gates are closed _____ Na+ inactivation gates are closed _____ K+ flows into the cell _____ K + gates are closed _____ Na+ activation gates and inactivation gates are both closed _____ K + flows out of the cellarrow_forwardEvents in Synaptic Signal Transmission 1. Neurotransmitters are released into the synaptic cleft. 2. Neurotransmitters bind to ion channels. 3. Sodium ions enter into the dendrites. 4. Neurotransmitters are returned to the axon terminal, broken down by the enzymes or diffused away from the synapse. 5. Action potential arrives in axon terminal. 6. Synaptic vesicles containing the neurotransmitters fuse with the presynaptic membrane. 7. lon channels open. The sequence in which the events numbered above are involved in the signal transmission across the synapse is ,andarrow_forward1. Now assume that you have a typical neuron that has very few Na+ channels open relative to the number of K+ channels. This is the condition of a neuron that is at rest. What will the resting membrane potential be? 2. Suppose a neuron’s resting potential is -70 mV. What will happen to the membrane potential if you could open more K+ channels open more Na+ channelsarrow_forward
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The Cell Membrane; Author: The Organic Chemistry Tutor;https://www.youtube.com/watch?v=AsffT7XIXbA;License: Standard youtube license