Biology: How Life Works
3rd Edition
ISBN: 9781319017637
Author: James Morris, Daniel Hartl, Andrew Knoll, Melissa Michael, Robert Lue, Andrew Berry, Andrew Biewener, Brian Farrell, N. Michele Holbrook
Publisher: Macmillan Higher Education
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Chapter 35.1, Problem 2SAQ
Summary Introduction
The activation of tension-generating regions inside muscle fibers is known as muscle contraction. There are three types of muscle contractions, which includes concentric contraction (shorten), isometric contraction (remain the same), and eccentric contractions (lengthen).
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- How do actin and myosin interact in a sarcomere to bring about muscle contraction? What roles do ATP and calcium play?arrow_forwardWhat are the structural and functional differences between slow and fast muscle?arrow_forwardWhy does muscle fatigue occur? since sarcomeres within skeletal muscles are rigidly aligned with each other what do you think excessive stretch or compression (remember the basic structure of the sarcomere with overlapping thin and thick filaments and the length-tension relationship) will do to the force generation of a muscle contraction?arrow_forward
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- What prevents cross-bridges from attaching to sites on the thinfilaments in a resting skeletal muscle?arrow_forwardWhich of these is the proper sequence of these events of muscle contraction 1) Action potential propagating down into the T-tubule 2) Power stroke 3) Ca+2 is released from the sarcoplasmic reticulum 4) The tropomyosin shifts out of the way thereby exposing the active sites of the actin Question 7 options: a) 1 à 3 à 4 à 2 b) 4 à 3 à 2 à 1 c) 1 à 4 à 2 à 3 d) 3 à 1 à 4 à 2arrow_forwardWhat are the three functional types of proteins found in a myofibril?arrow_forward
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