Principles of Anatomy and Physiology
16th Edition
ISBN: 9781119662792
Author: Tortora, Gerard J., DERRICKSON, Bryan H.
Publisher: WILEY
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Textbook Question
Chapter 10, Problem 7CP
What roles do contractile, regulatory, and structural proteins play in muscle contraction and relaxation?
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What roles do actin and myosin play during muscle contraction?
In skeletal muscle contraction, calcium ions apparently act to:
Question 8 options:
a)
block the channels of the voltage gated sodium channels
b)
move the tropomyosin so it’s no longer blocking the active sites of the actin
c)
release the inhibition on Z discs
d)
cause ATP binding to actin
31) which of the following are included in a triad found in skeletal muscle?
a) actin, myosin and calcium
b) an axon terminal, synaptic cleft and sarcolemma
c) A T tubule and two adjacent terminal cisterns
d) Larry, moe and curly
Chapter 10 Solutions
Principles of Anatomy and Physiology
Ch. 10 - To determine:
l. What features distinguish the...Ch. 10 - List the general functions of muscular tissue.Ch. 10 - 3. Describe the four properties of muscular...Ch. 10 - What types of fascia cover skeletal muscles?Ch. 10 - Why is a rich blood supply important for muscle...Ch. 10 - How are the structures of thin and thick filaments...Ch. 10 - What roles do contractile, regulatory, and...Ch. 10 - Prob. 8CPCh. 10 - To determined
9. How does sareomere length...Ch. 10 - Prob. 10CP
Ch. 10 - Which ATP-producing reactions are aerobic and...Ch. 10 - To determine:
12. Which sources provide ATP during...Ch. 10 - Prob. 13CPCh. 10 - Why is the term recovery oxygen uptake more...Ch. 10 - Prob. 15CPCh. 10 - What is motor unit recruitment?Ch. 10 - Prob. 17CPCh. 10 - Prob. 18CPCh. 10 - Prob. 19CPCh. 10 - Prob. 20CPCh. 10 - Prob. 21CPCh. 10 - On a cellular level, what causes muscle...Ch. 10 - What are the similarities among and differences...Ch. 10 - 24. What are the differences between visceral and...Ch. 10 - How are skeletal and smooth muscle similar? How do...Ch. 10 - 26. Which type of muscular tissue has the highest...Ch. 10 - Q. Which structures develop from myotomes,...Ch. 10 - Prob. 28CPCh. 10 - 29. Why do you think a healthy 30-year-old can...Ch. 10 - l. Weightlifter Jamal has been practicing many...Ch. 10 - Prob. 2CTQCh. 10 - Polio is a disease caused by a virus that can...
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- Which part of a skeletal muscle does shorten during muscular contraction? A) Thick filaments B) Thin filaments C) Z disks D) Sarcomeresarrow_forwardWhat is the physiological function of exercise to muscles?arrow_forwardOne of the primary characteristics of all muscle tissue is contractility, the ability to shorten (contract) and lengthen (relax). You've identified the various components of a myofibril above. Now, use the table below to indicate what occurs to each band, line, or zone when the muscle contracts vs. relaxes. What occurs to this region / structure during contraction/relaxation? Region / Structure A-Band H-Band I-Band M-Line Z-Line Zone of Overlap Sarcomere No change Shortens Lengthens Muscle Contraction Muscle Relaxationarrow_forward
- What is the role of calcium in muscle contractions? Multiple Choice a) To spread the action potential through the T-tubules b) To bind with troponin, changing its shape so that binding sites on the actin filament are exposed c) To transmit the action potential across the neuromuscular junction d) To re-establish the polarization of the plasma's membrane following an action potential e) To break the cross-bridges as a cofactor in the hydrolysis of ATParrow_forwardWhat is Whole-Muscle Contraction?arrow_forwardWhat are the mechanisms for muscle contraction vs. relaxation in regards to myosin/thick filaments/thin filament movement? Is it true that if tropomysin blocks myosin sites, contraction ends and muscle relaxes?arrow_forward
- Explain Molecular Mechanisms of Skeletal Muscle Contraction?arrow_forwardSkeletal muscle cells undergo contractions based on a molecular mechanism involving: 1)the sliding of actin and myosin filaments past each other without any change in filament length 2) the shortening of actin filaments following direct interaction with myosin 3) dynamic instability of microtubules 4)nonearrow_forwardIf a muscle cell had very short T-tubules, how much tension would the muscle fiber create, relative to a normal muscle fiber? Assume sarcoplasmic reticulum can still react to activity at the neuromuscular junction. a)Less tension would be created. b) No difference in tension creation. c) More tension would be created. d) No tension would be created.arrow_forward
- What two types of microfilament make up the muscle sarcomere? Which motor protein is primarily involved in muscle contraction?arrow_forwardPick the list that has the order from the smallest to the larges a) Sarcomere , Myofibrilactin , myosin b) Actin, Sarcomere, Myofibril, Muscle fiber c) Actin Sarcomere, Myofibril , Muscle, Myosin d) Muscle fiber, myofibril, actin, myosin , sarcomerearrow_forwardWhich region or organelle—cytosol, mitochondrion, or SR—contains the highest concentration of calcium ions in a resting muscle fiber? Which structure provides the ATP needed for muscle activity?arrow_forward
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