CAMPBELL BIOLOGY:CONCEPTS..W/JUNGLE>IC
15th Edition
ISBN: 9781269930741
Author: Reece
Publisher: PEARSON C
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Textbook Question
Chapter 30, Problem 8TYK
What is the role of calcium in muscle contraction?
a. Its binding to a regulatory protein causes the protein to move, exposing actin binding sites to the myosin heads.
b. It provides energy for contraction.
c. It blocks contraction when the muscle relaxes.
d. It forms the heads of the myosin molecules in the thick filaments inside a muscle fiber.
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In muscle cells, magnesium ions compete with calcium ions for binding sites on troponin molecules. If a person has too high a concentration of magnesium ions in the blood, magnesium ions can prevent calcium ions from binding troponin.
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Chapter 30 Solutions
CAMPBELL BIOLOGY:CONCEPTS..W/JUNGLE>IC
Ch. 30 - Complete this concept map on animal movement.Ch. 30 - A humans internal organs are protected mainly by...Ch. 30 - Arm muscles and leg muscles are arranged in...Ch. 30 - Gravity would have the least effect on the...Ch. 30 - Prob. 5TYKCh. 30 - Prob. 6TYKCh. 30 - When a dog is running fast, its body position is...Ch. 30 - What is the role of calcium in muscle contraction?...Ch. 30 - Muscle A and muscle B have the same number of...Ch. 30 - Prob. 10TYK
Ch. 30 - Prob. 11TYKCh. 30 - Prob. 12TYKCh. 30 - Prob. 13TYKCh. 30 - Describe how you bend your arm, starting with...Ch. 30 - Prob. 15TYKCh. 30 - Drugs are often used to relax muscles during...Ch. 30 - An earthworms body consists of a number of...Ch. 30 - When a person dies, muscles become rigid and fixed...Ch. 30 - SCIENTIFIC THINKING Imagine you have a friend who...
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