Becker's World of the Cell (9th Edition)
9th Edition
ISBN: 9780321934925
Author: Jeff Hardin, Gregory Paul Bertoni
Publisher: PEARSON
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Chapter 22, Problem 22.7PS
One-Way Propagation. Why does an action potential move in only one direction down the axon?
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SHORT ANSWER. Write the word or phrase that best completes each statement or answers the question:
A
Figure 11.2
Using Figure 11.2, match the followwing:
1) Ion channel.
1)
2) Synaptic vesicles.
2)
3) Calcium ions.
3)
4) Postsynaptic membrane.
4)
5) Synaptic cleft.
5)
Nerve impulse
Question. Explain the signal transduction mechanism for slow ligand-gated ion
channels.
Please ASAP. Thanku.
What is the effect of increasing the activity of HCN (Ih) channels on action potential firing rate?
Chapter 22 Solutions
Becker's World of the Cell (9th Edition)
Ch. 22 - Ouabain is an African plant derivative that has...Ch. 22 - You have isolated a toxin from a previously...Ch. 22 - The poison produced by some species of Central and...Ch. 22 - Drugs that affect the reuptake of...Ch. 22 - The Truth About Nerve Cells. For each of the...Ch. 22 - QUANTITATIVE The Resting Membrane Potential. The...Ch. 22 - QUANTITATIVE Patch Clamping. Patch-clamp...Ch. 22 - The Equilibrium Potential. Answer each of the...Ch. 22 - QUANTITATIVE Heart Throbs. An understanding of...Ch. 22 - The All-or-None Response of Membrane Excitation. A...
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- potential across a synapse is regulated). produce an effect by targeting a different part of the process by which conduction of an actionarrow_forwardVision. Recall that muscarinic ACh receptors are located on smooth muscle tissue. The iris is composed of smooth muscle and is responsible for dilation and constriction of the pupil. Tropicamide is a medication applied to the eye during an eye exam. If Tropicamide is an antagonist to the muscarinic receptors, what effect will this have on the eye? Why do you have difficulty seeing well while you wait for the effects of this medicine to wear off?arrow_forwardmolecular components not cellular.Answer carefully. Question: In terms of nerve action, describe 4 different molecular components involved. And for each, give a defect that would block nerve function.arrow_forward
- Neurons a. How does the neuron re-establish its resting membrane potential after an action potential? -Sodium (Na+) gated channels close -Sodium (Na+) gated channels open -Potassium (K+) and sodium (Na+) gated channels close -Sodium/ potassium pumps (Na+/K+ pumps) exchange ions b.Which of the ion channels utilizes a passive transport system (in other words, do not require ATP)? Mark all that apply. -K+ leak channels -K+ channels (gates) -Na+ leak channels -Na+ channels (gates) -Na+/K+ pumps c.The absolute refractory period occurs when the neuron is undergoing the action potential and implies it cannot be further stimulated. True or False d. After an action potential, as the neuron repolarizes, the resting membrane potential is immediately re-established True or False e.Match the type of gate or process with its overall effect on the neuron So Match each term with the best-fit description. Terms: Na+/K+ pump K+ voltage gate Resting membrane potential Hyperpolarization Na+ voltage gate…arrow_forwardSHORT ANSWER. Write the word or phrase that best completes each statement or answers the question 80 o Figure 11.2 Using Figure 11.2, match the following: 1) Ion channel. 1) 2) Synaptic vesicles. 2) 3) Calcium ions. 3) 4) Postsynaptic membrane. 4) 5) Synaptic cleft. 5) Nerve impulsearrow_forwardFrom the image. Do you think that a membrane potential exists for this synthetic plasma membrane? If your answer is “yes,” please indicate whether it is negative or positive at the region closer to the inner leaflet of the plasma membrane. Explain your reasoning.arrow_forward
- Please ASAP. Thanku. Question 15 If Na+ channels are blocked by lidocaine (sodium channel blocker), what happens to the equilibrium potential for Na+? Becomes more positive Becomes more negative Does not changearrow_forwardTrue or false. The different subunits that a muscatinic acetylcholine receptor is made of determines the properties of the receptor such as what ion it conducts. If false what is determines the properties ?arrow_forwardENS and how it works. Since it doesn't use or go through the CNS, where does the information go to? Do the ENS neurons go and attach to the Parasympathetic and sympathetic NS or is it something completely different? Also what information can the ENS integrate compared to the other two?arrow_forward
- Energy is required to do work. What type of work is being done by the Na+/K+ ATPase that allows it to maintain a steady state in the neuron? 1. both chemical and transport work 2. Mechanical work 3.chemcial work 4.transport workarrow_forwardReceptor for epinephrine consists of seven transmembrane helices. T/Farrow_forwardThe one-way propagation of action potentials away from the original site of activation is ensured by the thanks a lot in advance:)arrow_forward
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