Biology: The Dynamic Science (MindTap Course List)
4th Edition
ISBN: 9781305389892
Author: Peter J. Russell, Paul E. Hertz, Beverly McMillan
Publisher: Cengage Learning
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Chapter 38, Problem 14TYK
Summary Introduction
To review:
Controlling the car’s speed by a typical negative feedback mechanism while driving.
Introduction:
The negative feedback mechanism is a controlled process in which the feedback gives a negative signal (inhibiting signal), that means an opposite response. The moment when the body experiences something exceeding the normal range, the negative feedback mechanism reduces it to a normal range.
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The motor unit firing patterns are measured in a human hand muscle using an electromyography (EMG) recording. Which one of the following statements is the best description of the EMG pattern observed as the individual voluntarily attempts to make a low-level force of contraction in the muscle and steadily increases the force of contraction?
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Modulation of organ function, as…
Use the following information to answer the next question:
In a classic experiment, the strength of a neural stimulus and the resulting muscle
contraction are compared. A single motor neuron that sends a message to a muscle
fibre is suspended. One end is attached to the muscle fibre, and the free end of the
muscle fibre is attached to a mass. If an electrical stimulus is sufficient to cause an
impulse in the neuron, the muscle will contract and lift the mass. The following data
were obtained from the experiment.
Strength of Stimulus (mV)
Mass Lifted by Muscle (g)
1
2
10
3
10
4
Analyze the data and answer the following questions:
1. a.
Define threshold potential and illustrate your definition with a specific
example. What is the minimum stimulus required to reach the threshold
potential for this neuron?
Answer:
Explain the all-or-none response. Predict the mass that could be lifted at
4 mV of stimuli. Explain your answer.
b.
Answer:
Choose a specific example of a sensory receptor, and…
Chapter 38 Solutions
Biology: The Dynamic Science (MindTap Course List)
Ch. 38.1 - Prob. 1SBCh. 38.1 - Prob. 2SBCh. 38.2 - Prob. 1SBCh. 38.2 - What are the six major types of connective tissue...Ch. 38.2 - Prob. 3SBCh. 38.3 - Prob. 1SBCh. 38.4 - Prob. 1SBCh. 38 - Which tissue type consisting of sheetlike layers...Ch. 38 - Which of the following is a constant source of...Ch. 38 - A flexible, rubbery protein in connective tissue...
Ch. 38 - Prob. 4TYKCh. 38 - Prob. 5TYKCh. 38 - Lifting weights will most increase the size of:...Ch. 38 - Which muscle types appear striated under a...Ch. 38 - Prob. 8TYKCh. 38 - Prob. 9TYKCh. 38 - Prob. 10TYKCh. 38 - Prob. 11TYKCh. 38 - Prob. 12TYKCh. 38 - Discuss Concepts Near the time of childbirth,...Ch. 38 - Prob. 14TYKCh. 38 - 15. What effect do you think a program of lifting...Ch. 38 - The regulation of temperature in mammals and birds...Ch. 38 - Prob. 17TYKCh. 38 - Prob. 1ITD
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