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 37.1, Problem 3CC
WHAT IF? How might increased branching of an axon help coordinate responses to signals communicated by the nervous system?
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Explain in few sentences !! how a neuron can repair itself. What increases the likelihood of repair; what decreases the likelihood of repair? If repair is not possible, what other options are possible to innervate the effector organ?
WHAT IF? Ouabain, a plant substance used in some cultures topoison hunting arrows, disables the sodium-potassium pump.What change in the resting potential would you expect to seeif you treated a neuron with ouabain? Explain.
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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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- 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_forwardQ4.7. Why does Na* enter the cell during the action potential? Because the Na* channels are open and only let Na* move from outside to inside Because the action potential pulls positive ions into the cell while Na* and K* channels are open Because Na channels are open and allow Na* ions to move down the length of the axon to produce neurotransmitter at the axon terminal Because Na" channels are open and there is a higher concentration of Na outside of the neuron than insidearrow_forwardQ 15 of 15 How do myelinated axons differ from unmyelinated axons? O Unmyelinated axons travel slower than myelinated axons. Myelinated axons prune neural connections. Myelinated axons travel slower than unmyelinated axons. Unmyelinated axons advance neural connections.arrow_forward
- Q5.6. If calcium ions, each of which has a charge of +2 (Ca²+), moved INTO a neuron, and no other ions were moving, what would be TRUE? The area outside the neuron would be become more positively charged. The concentration of Ca²+ inside the cell would decrease. The neuron would become more negative. The neuron would become more positive. Submitarrow_forwardMatch the term with its definition! Thanksarrow_forwardQ5.3. After the rising phase, which ion channel is responsible for action potential returning to its resting Vm, and why? Na+ channels, because positive Na* ions are at higher concentration outside the axon than inside, and so they enter the axon and raise V m Na* channels, because positive Na* ions are at higher concentration inside the axon than outside, and so they leave the axon and raise Im K* channels, because positive K* ions are at higher concentration outside the axon than inside, and so they enter the axon and raise Vm K+ channels, because positive K* ions are at higher concentration inside the axon than outside, and so they leave the axon and lower Vm Submitarrow_forward
- Please help asaparrow_forwardand why? Q4.3. After the rising phase, which ion channel is responsible for action potential returning to its resting Vm, Na* channels, because positive Na* ions are at higher concentration outside the axon than inside, and so they enter the axon and raise V m Na* channels, because positive Na* ions are at higher concentration inside the axon than outside, and so they leave the axon and raise V m O K* channels, because positive K* ions are at higher concentration outside the axon than inside, and so they enter the axon and raise m O K* channels, because positive K* ions are at higher concentration inside the axon than outside, and so they leave the axon and lower Vmarrow_forwardHelp me pleasearrow_forward
- please answer 23, 24arrow_forwardNeed help with anatomyarrow_forwardQ4.5. Why do neurons generate an action potential, instead of simply relying on the opening of ion channels near the stimulus site to transmit information? Because without the action potential, changes in Vm at the stimulus site might not reach the axon terminal Because without the action potential, the neuron would not depolarize Because action potentials help the body keep ion concentrations at appropriate levels Because without the action potential, the neuron would not return to resting potential O Oarrow_forward
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