Campbell Biology
12th Edition
ISBN: 9780135188743
Author: Urry
Publisher: PEARSON
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Chapter 48, Problem 8TYU
Summary Introduction
To explain: The effects of a drug on behavior that mimics the GABA in the central nervous system (CNS).
Introduction: Gamma aminobutyric acid (GABA) is an inhibitory neurotransmitter. It is involved in the communication between the brain cells.
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QUESTION 22
Which one is not the best way to describe necessary "threshold" as "sensitivity" declines with age?
Individuals with lower sensitivity also have a lower threshold or tolerance for stimulation.
O
As sensitivity goes down, the threshold must be higher to compensate.
Individuals with a low-sensitivity, need more stimulation than people with high-sensitivity.
none of the above
QUESTION 23
Limbic System, Emotion, Reward, and Addiction
Describe how stimuli gain emotional significance using fear conditioning as an example at the introduction level (Introduction to Neuroscience College Level). Provide many of your own digital or handwritten diagrams to complement your explanation.
Part 2: Please read the following scenarios. For each scenario, identify the confound and suggest how it might be removed in a follow-up experiment.
McCann and Holmes (1984) tested the hypothesis that exercise reduces depression. They randomly assigned depressed undergraduate women either to an exercise condition (attending an aerobics class a couple of times a week for ten weeks) or to a relaxation training condition (the individuals relaxed at home by watching a videotape over the same period of time). Although the results showed that the exercise group reported less depression at the end of the ten-week period than did the relaxation group, why can't the researchers conclude that exercise reduces depression?
Chapter 48 Solutions
Campbell Biology
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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