CAMPBEL BIOLOGY:CONCEPTS & CONNECTIONS
10th Edition
ISBN: 9780136538820
Author: Taylor
Publisher: INTER PEAR
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Chapter 28, Problem 9TYK
Using microelectrodes, a researcher recorded nerve signals in four neurons in the brain of a snail, called A, B, C, and D in the table below. A, B, and C can all transmit signals to D. In three experiments, the animal was stimulated in different ways. The number of nerve signals transmitted per second by each of the cells is recorded in the table. Write a short paragraph explaining the different results of the three experiments.
Data from E. R. Kandel and L. Tauc, Input organization of two symmetrical giant cells in the snail brain, Journal of Physiology 183: 269–86 (1966).
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A transducer is used to
1. Change the stimulus
2. Stimulate the frog muscle
3. Measure the force generated by muscle
Four research teams measured the speed at which signals travel down a certain type of nerve fiber, and what each team wrote in its team notebook is shown in
the table below.
Suppose a later and more reliable measurement gives 111 m/s for the signal speed in the same type of nerve fiber. Decide which of the earlier measurements
was the most accurate, and which was the most precise.
what was written
most accurate
most precise
team
in the notebook
?
measurement
measurement
A
"101.m/s"
В
"91.m/s + 5.0m/s"
C
"131.m/s + 2.0%"
D
"between 106.0m/s and 126.0m/s"
The experiment that crossed the nerve from a muscle that had a short contraction time "a fast muscle" to a muscle with a slower contraction profile and from the slower muscle to the faster muscle demonstrated that the nerve or activity of the muscle had no effect on properties of the muscle fibers.
a.) True
b.) False
Chapter 28 Solutions
CAMPBEL BIOLOGY:CONCEPTS & CONNECTIONS
Ch. 28 - Test your understanding of the nervous system by...Ch. 28 - The inside of the neuron has a lower concentration...Ch. 28 - Prob. 3TYKCh. 28 - What causes a nerve signal to move from one end of...Ch. 28 - Prob. 5TYKCh. 28 - Prob. 6TYKCh. 28 - Anesthetics block pain by blocking the...Ch. 28 - Prob. 8TYKCh. 28 - Using microelectrodes, a researcher recorded nerve...Ch. 28 - Prob. 10TYK
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