Becker's World of the Cell (9th Edition)
9th Edition
ISBN: 9780321934925
Author: Jeff Hardin, Gregory Paul Bertoni
Publisher: PEARSON
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Textbook Question
Chapter 14, Problem 14.4PS
Rigor Mortis and the Contraction Cycle. After death, the muscles of the body become very stiff and inextensible, and the corpse is said to go into rigor.
(a) Explain the basis of rigor. Where in the contraction cycle is the muscle arrested? Why?
(b) When would you be likely to go into rigor faster: if you were to die while racing to class or while sitting in lecture? Explain.
(c) What effect do you think the addition of ATP might have on muscles in rigor?
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Actin in action, muscle satisfaction. The movement of biceps require
sarcomere
.
Select one:
a. contradiction
b. contraction
c. election
d. this is no correct option
e. faction
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Muscle Physiology
Some skeletal muscle fibers are “fast-twitch” fibers (white fibers), and others are “slow-twitch” (red) fibers. Would you expect an athlete proficient in running the 100-yard dash to have a greater proportion of red fibers or white fibers in muscles of the leg? Why?
Define the following:
Maximal stimulus
Threshold stimulus
Submaximal stimulus
A skeletal muscle can be stimulated, under laboratory conditions, with a supramaximal stimulus. Is it possible for the muscle to respond with a supramaximal contraction? Explain
Define a motor unit. Of what physiological advantage is a small motor unit arrangement in skeletal muscle?
Explain why a latent period is observed between the application of a stimulus and contraction of the stimulated muscle.
Explain, giving two causative factors, why skeletal muscle displays fatigue.
Does complete or incomplete tetanus occur physiologically? Explain.
Define the following:
Isometric contraction
Isotonic contraction
Optimum length…
Anatomy and Physiology question. Please help!
You likely noticed that subjects could not maintain their maximum grip strength for very longbut could maintain just above 50% grip strength for quite some time. In terms of muscle unitrecruitment and fatigue, explain why this is possible
Chapter 14 Solutions
Becker's World of the Cell (9th Edition)
Ch. 14 - If myosin V moved more like an inchworm (meaning...Ch. 14 - Kinesins and dyneins are both microtubule-based...Ch. 14 - CONCEPT CHECK 14.2 Human sperm swim using a...Ch. 14 - A single myosin II motor domain can exert about 15...Ch. 14 - Prob. 14.4CCCh. 14 - In addition to being found at the rear of...Ch. 14 - Ciliobrevins. Ciliobrevins were reported in 2012...Ch. 14 - Prob. 14.2PSCh. 14 - Prob. 14.3PSCh. 14 - Rigor Mortis and the Contraction Cycle. After...
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- If using stairs excerise is an excellent approach to strengthen the core muscles. It also engages every major muscle in your lower body - glutes, hamstrings, quadriceps, abs, and calves - in exercise, toning and sculpting your physique. Therefore climbing stairs for 2-4 hours daily will build the muscle mass and strength, stamina, endurance and flexibility of the body. But what exactly can do for person strength is that legs only, stamina and endurance and resilience and flexibility what does that mean to get better? I'm talking about ten staircase floor of ten steps each one that should be 200 steps together. So did 2-4hrs daily fir two months what can you get for strengths and more how strong can I lift?arrow_forwardA motor unit from a skeletal muscle contains 1500 muscle fibers. Would this muscle be involved in fine, delicate movements or in powerful, gross movements? Explain.arrow_forwardPart E - Identification of the Events of a Muscle Contraction Drag and drop the correct terms in the correct sequence of events. > View Available Hint(s) Reset Help Depolarization of the sarcolemma Muscle fiber returns to the resting membrane potential Repolarization of the sarcolemma Neurotransmitter binds to receptors on the muscle fiber Sodium channels on the sarcolemma open, and sodium enters the cell Neuron releases a neurotransmitter. Muscle fiber is relaxed. Submit Provide Feedbackarrow_forward
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