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Biology (MindTap Course List)

11th Edition
Eldra Solomon + 3 others
Publisher: Cengage Learning
ISBN: 9781337392938
BuyFind

Biology (MindTap Course List)

11th Edition
Eldra Solomon + 3 others
Publisher: Cengage Learning
ISBN: 9781337392938

Solutions

Chapter
Section
Chapter 41.4, Problem 9LO
Textbook Problem

Compare excitatory and inhibitory signals and their effects.

Expert Solution
Summary Introduction

To compare: The excitatory and inhibitory signals from neurotransmitters and their effect.

Introduction: Signal transduction is possible because of specialized nerve cells called neurons. The neurons are not physically joined together, so at neuron junction, signal is transmitted by a neurotransmitter molecule. Neurotransmitters can have different effects on binding to different receptors. Even on the same receptors, different neurotransmitters binding produce a different effect.

Explanation of Solution

The similarities between excitatory and inhibitory signals are:

  • Both signals help in changing postsynaptic potentials.
  • They both are originated from the postsynaptic cell membrane.
  • Development of signals is mediated by ligand-gated ion channels which function to bind neurotransmitter with the receptor.
  • These are the result of graded potential arising by “ligand gated ion channel”
  • These depend upon the nature of neurotransmitter, type of receptors and location of binding.

The differences between excitatory and inhibitory signals are:

No.CharacterExcitatory SignalsInhibitory Signals
1Difference in polarizationResults in depolarization of membrane resulting in action potential to set off.Results in hyperpolarization of membrane potential away from an action potential.
2The potential difference from the thresholdCauses the potential to move towards threshold potential. For example: -270mV to -260mVCauses the potential to move away from threshold potential...

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Chapter 41 Solutions

Biology (MindTap Course List)
Show all chapter solutions
Ch. 41.3 - Contrast continuous conduction with saltatory...Ch. 41.3 - How do ion channels and sodiumpotassium pumps...Ch. 41.3 - Describe the sequence of events that occurs when...Ch. 41.3 - Contrast an action potential with a graded...Ch. 41.3 - What are the benefits of saltatory conduction...Ch. 41.4 - Describe the actions of the neurotransmitters...Ch. 41.4 - List the sequence of events that take place in...Ch. 41.4 - Compare excitatory and inhibitory signals and...Ch. 41.4 - What are some functions of biogenic amines? of...Ch. 41.4 - VISUALIZE Sketch the sequence of events that takes...Ch. 41.4 - How are EPSPs produced? IPSPs?Ch. 41.5 - Define neural integration and describe how a...Ch. 41.5 - What is neural integration?Ch. 41.5 - How do temporal and spatial summation differ?Ch. 41.5 - Where does most neural integration take place in...Ch. 41.6 - Distinguish between convergence and divergence,...Ch. 41.6 - VISUALIZE Draw simple sketches that contrast...Ch. 41 - Test Your Understanding Know and Comprehend 1....Ch. 41 - Test Your Understanding Know and Comprehend 2. The...Ch. 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 - VISUALIZE Using the diagram in question 7, add...Ch. 41 - INTERPRET DATA State whether each of the following...Ch. 41 - Test Your Understanding 10. Develop a hypothesis...Ch. 41 - SCIENCE, TECHNOLOGY, AND SOCIETY A test for risk...Ch. 41 - Test Your Understanding 12. SCIENCE, TECHNOLOGY,...Ch. 41 - Test Your Understanding 13. EVOLUTION LINK From...

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