Human Biology: Concepts and Current Issues (8th Edition)
8th Edition
ISBN: 9780134042435
Author: Michael D. Johnson
Publisher: PEARSON
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Textbook Question
Chapter 6, Problem 13TY
Which of the following would have motor units with the smallest number of muscle cells?
a. thigh muscle
b. muscles in fingers
c. abdominal muscles
d. muscles of the back
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A skeletal muscle motor unit
A.Is the number of muscle cells innervated by one motor neuron.
B.Is the number of motor neurons innervating one muscle cell.
C.Size determines the ability to control a muscle
D.Size determines how much a muscle contracts at any one time.
When muscle fibers are stimulated so frequently they do not have an opportunity to relax, they are experiencing: a. unfused or incomplete tetanus. b. wave summation. c. fused or complete tetanus. d. twitch.
Which of the following would most likely cause
hypertrophy of skeletal muscle in the arms
Select one:
a. using a computer for most of your job
b. muscle cramps due to poor hydration
c. immobilization due to wearing a cast
d. working out by lifting weights
O
O
O
O
Chapter 6 Solutions
Human Biology: Concepts and Current Issues (8th Edition)
Ch. 6 -
1. Do you think we should continue to try to...Ch. 6 - Prob. 2QCCh. 6 - Describe how muscle contraction can resist...Ch. 6 - Describe how a muscle's origin and insertion...Ch. 6 - Describe the roles of calcium in muscle...Ch. 6 -
4. Explain what causes rigor mortis.
Ch. 6 - Prob. 5CRCh. 6 - Prob. 6CRCh. 6 - Prob. 7CRCh. 6 -
8. Compare and contrast how a constant degree of...
Ch. 6 - Prob. 9CRCh. 6 - Prob. 10CRCh. 6 - Prob. 1TYCh. 6 -
2. Which of the following choices arranges the...Ch. 6 - All of the following are functions of the muscular...Ch. 6 -
4. Which of the following happens during muscle...Ch. 6 -
5. Botulism toxin inhibits the release of...Ch. 6 - The sliding filament mechanism describes the...Ch. 6 -
7. What is the first and most direct energy...Ch. 6 - As you clasp your hands in front of you and push...Ch. 6 -
9. All of the following may happen in response to...Ch. 6 - Which of the following is/are characteristic of...Ch. 6 - Which of the following is the site of calcium ion...Ch. 6 - What is the role of ATP in muscle function? a. ATP...Ch. 6 -
13. Which of the following would have motor units...Ch. 6 - Which type(s) of muscle cells can contract the...Ch. 6 - Prob. 15TYCh. 6 - Prob. 1AWKCh. 6 - Why do you think it is generally accepted medical...Ch. 6 - Prob. 3AWKCh. 6 - What would happen to a muscle if one of its...Ch. 6 - Prob. 5AWKCh. 6 - Prob. 6AWKCh. 6 - Prob. 7AWKCh. 6 - Prob. 8AWK
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- You are training athletes for the 100-meter dash. They need muscles specialized for speed and strength, not endurance. What muscle characteristics would your training regimen aim to develop? How would you alter it to train a long-distance swimmer?arrow_forwardIn a general sense, how do skeletal muscles produce movement?arrow_forwardWhat is a motor unit? Why does a rapid series of muscle twitches yield a stronger overall contraction than a single twitch?arrow_forward
- What are the structural and functional differences between slow and fast muscle?arrow_forwardWhat is the function of the sarcoplasmic reticulum in muscle cell contraction?arrow_forwardWhich of the following sentences is NOT correct? A. White fibers make up fast-twitch muscle B. Muscle spindle is a type of receptor that detects muscle length C. Exocrine gland secretes its product directly into the bloodstream D. When an action potential is generated within a motor neuron, every muscle cell of the motor unit is stimulated to contractarrow_forward
- Mark the following statements as true or false. If a statement is false, correct it to make a true statement. a. Muscle fibers generate more tension if the starting length of their sarcomeres is very short. b. Stimulation by a motor neuron before a muscle fiber has fully relaxed results in a condition called wave summation. c. Muscles that require a great deal of precise control will have large motor units. d. A muscle fiber changes length during isotonic concentric and isotonic eccentric contractionsarrow_forwardThe release of which of the following minerals from muscle cell storage sites stimulates muscle contraction? A. Phosphorus B. Calcium C. Potassium D. Sodiumarrow_forwardWhen the length of the muscle stays the same but the force increases during contraction it is referred to as an: A. Isotonic Contraction B. Isometric Contraction C. Isotreppid Contraction D. Isochronal Contractionarrow_forward
- Which of the following is a microscopic feature of a skeletal muscle fiber? a. It contains multiple nuclei that are centrally located b. it contains myoglobin for oxygen storage c. it contains glycosomes for glycogen storage d. a and b e. b and carrow_forwardWhich of the following correctly lists the structures that make up a motor unit? a. motor neuron plus some of the muscle fibers it innervates b. motor neuron plus all of the muscle fibers it innervates c. motor neuron plus one of the muscle fibers it innervates d. all of the above e. none of the abovearrow_forwardWhich of the following statements is not characteristic of smooth muscles? a.Myosin phosphatase is required for contraction. b.They are able to conduct graded depolarizations. c.They can enter a latch state. d.They can produce graded contractions in response to graded depolarizations.arrow_forward
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