BIOLOGY:CONCEPTS+APPL.(LOOSELEAF)
10th Edition
ISBN: 9781305967359
Author: STARR
Publisher: CENGAGE L
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Chapter 32, Problem 5SA
Summary Introduction
Introduction:
Skeletal muscles are made up of skeletal muscle fibers and connective tissues. The important function of skeletal muscle is to allow the intentional or voluntary movement of the body parts. In addition to this, skeletal muscle also plays an important role in regulating the temperature of the body.
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All of the following characteristics apply to skeletal muscle except
a. They are striated.
b. They are multinucleated.
c. They are voluntary.
d. They contain intercalated discs.
e. They are attached to the skeleton by means of tendons.
Which of the following changes takes place when a skeletal muscle contracts?A. Z discs move farther apart.B. Actin filaments contract.C. Myosin filaments contract.D. Sarcomeres become shorter.
In a muscle, muscle fibers are arranged in bundles that are wrapped in a thick layer of connective tissue.
This thick layer of connective tissue which wraps the bundles is called ....
O perimysium
O epimysium
O endomysium
O fascia
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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
- After death, a person no longer makes ATP, so calcium stored in the sarcoplasmic reticulum diffuses down its concentration gradient into the muscle cytoplasm. This result is rigor mortis----an unbreakable state of muscle contraction that stiffens the body for a few days until muscles begin to decay. Explain why this contraction occurs.arrow_forwardCheetahs and human sprinters tend to have a high proportion of ________fibers in their leg muscles. a. white b. fast red c. slow redarrow_forwardWhy do you think a person is able to perform anaerobic exercise (such as lifting and holding a heavy weight) only briefly but can sustain aerobic exercise (such as walking or swimming) for long periods? (Hint: Muscles have limited energy stores.)arrow_forward
- After a vigorous exercise, you may experience cramps in your leg muscles. Why does this happen?arrow_forwardGraph A in this diagram represents A) summation and tetanus of a smooth muscle fibre. C) a simple skeletal muscle twitch c) summation and tetanus of a skeletal muscle fibre. D)simple smooth muscle twitch.arrow_forwardWhat happens to sarcomeres when actin and myosin filaments in a muscle fiber interact during the contraction phase? A) sarcomeres usually fatigue B) sarcomeres usually get shorter C) sarcomeres usually get longer D) sarcomeres stay the samearrow_forward
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