Biology - With Access (Custom)
14th Edition
ISBN: 9781269790000
Author: Gerber
Publisher: PEARSON
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Chapter 48.4, Problem 2CC
Some pesticides inhibit acetylcholinesterase, the enzyme that breaks down acetylcholine. Explain how these toxins would affect EPSPs produced by acetylcholine.
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some pesticides inhibit acetylcholinesterase, the enzymethat breaks down acetylcholine. explain how these toxinswould affect ePsPs produced by acetylcholine.
Caffeine prolongs the life span of acetylcholine molecules in the motor junctions. Explain how this fact is related to caffeine’s tendency to cause jitters, such as hand tremors and other small involuntary contractions.
dendrotoxins, produced by the mamba snakes are inhibitors of the voltage gated k+ channel. what phase of the action potential with this toxin effect? how would it affect ion permeability during this phase howard ion movement be affected?
Chapter 48 Solutions
Biology - With Access (Custom)
Ch. 48.1 - Prob. 1CCCh. 48.1 - Describe the basic pathway of information flow...Ch. 48.1 - WHAT IF? How might increased branching of an axon...Ch. 48.2 - Under what circumstances could ions flow through...Ch. 48.2 - WHAT IF? Suppose a cell's membrane potential...Ch. 48.2 - MAKE CONNECTiONS Review Figure 7.10, which...Ch. 48.3 - How do action potentials and graded potentials...Ch. 48.3 - In multiple sclerosis (from the Greek skleros,...Ch. 48.3 - How do both negative and positive feedback...Ch. 48.3 - WHAT IF? Suppose a mutation caused gated sodium...
Ch. 48.4 - Prob. 1CCCh. 48.4 - Some pesticides inhibit acetylcholinesterase, the...Ch. 48.4 - Prob. 3CCCh. 48 - How would severing an axon affect the flow of...Ch. 48 - Suppose you placed an isolated neuron in a...Ch. 48 - Prob. 48.3CRCh. 48 - Prob. 48.4CRCh. 48 - Level 1: Knowledge/Comprehension 1. What happens...Ch. 48 - Level 1: Knowledge/Comprehension 1. What happens...Ch. 48 - Where are neurotransmitter receptors located? (A)...Ch. 48 - Why are action potentials usually conducted in one...Ch. 48 - Which of the following is the most direct result...Ch. 48 - Suppose a particular neurotransmitter causes an...Ch. 48 - WHAT IF? Ouabain, a plant substance used in some...Ch. 48 - Prob. 8TYUCh. 48 - DRAW IT Suppose a researcher inserts a pair of...Ch. 48 - EVOLUTION CONNECTION An action potential is an...Ch. 48 - Prob. 11TYUCh. 48 - WRITE ABOUT A THEME: ORGANIZATION In a short essay...Ch. 48 - Prob. 13TYU
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- Describe the 6 step sequence of events that occurs at the NMJ in response to a nerve Action Potential.arrow_forwardCorrect the following false statement: "Any cell that has the acetylcholine receptor will have the same response as any other cell that also has the acetylcholine receptor when exposed to acetylcholine". Explain why this statement is false.arrow_forwardDescribe the function of acetylcholinesterase and discuss its physiological significance.arrow_forward
- Dendrotoxins, produced by the mamba snakes (Dendroaspis), are inhibitors of the voltage-gated K+ channels. What phase of the action potential would this toxin affect? How would it affect ion permeability during this phase? How would ion movement be affected?arrow_forwardExplain how inhibition can be produced by (a) muscarinic ACh receptors in the heart; and (b) GABAreceptors in neurons of the CNS.arrow_forwardMuscarinic receptors binda. epinephrine.b. norepinephrine.c. acetylcholine.d. cholinesterase.e. neuropeptides.arrow_forward
- Albert accidentally ingests the poison tetrodotoxin from the pufferfish, which you know blocks voltage-gated Na+ channels. Predict the symptoms Albert will experience from this poisoningarrow_forwardDescribe the effect of the botulinum toxin, which inhibits the release of acetylcholine at the neuromuscular junction. Would the poison curare, which competes for acetylcholine receptors (by attaching to the acetylcholine receptors and preventing acetylcholine from binding) have a similar effect? Explainarrow_forwardDescribe the direction of action potential propagation relative to the CNS in the spinal nerves, dorsal roots, and ventral roots. List some of the responses stimulated by the autonomic nervous system in (a) a person who is extremely angry and (b) a person who has just finished eating and is now relaxing.arrow_forward
- Unmyelinated axons conduct action potentials without decrement, but when myelinated axons lose myelin in demyelinating diseases such as multiple sclerosis, conduction of action potentials is blocked. Why?arrow_forwardAcetylcholine acts via muscarinic acetylcholine receptors to delay potassium channel closure and thus decrease heart rate. ________________ can reverse this effect by competitively binding to these receptors and blocking their action. norepinephrine atropine epinephrine histaminearrow_forwardEpilepsy is the disesae. Which areas of the brain are affected by epilpesy? What type of neurotransmitters are altered in this epilepsy? Provide neurophysiological evidence. Please talk about voltage gated K+, Na+, Ca++ and ligand channels. Tell if any of them are affected. if affected what is the consequence?Which ion channels are affected?arrow_forward
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