Seeley's Anatomy & Physiology
11th Edition
ISBN: 9781259254963
Author: Jennifer Regan (author), Andrew Russo (author), Rod Seeley (author) Cinnamon Vanputte (author)
Publisher: McGraw Hill Higher Education
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Textbook Question
Chapter 9, Problem 4RAC
Each myofibril
- Is made up of many muscle fibers.
- Contains sarcoplasmic reticulum.
- Is made up of many sarcomeres.
- Contains T tubules.
- Is the same thing as a muscle fiber.
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Students have asked these similar questions
Which of the following correctly states the importance of an action potential to muscle contration?
The SR will only release Ca2+ if it has been electrically stimulated.
Sarcomeres require a negative electrical charge to start sliding.
Actin and myosin must be electrically charged to create a cross-bridge.
ATP cannot be split into ADP and Pi without an action potential.
Skeletal muscle will be released in its contracted (rigor) state when:
Group of answer choices
ATP is hydrolyzed into forming ADP and inorganic phosphate.
ATP binds to the myosin head.
ADP is dissociated from the myosin head.
ATP binds to the actin G-molecule.
Which of the following is NOT correct regarding muscle contraction?
O Ca++ in the sarcoplasm returns to the nucleus to be stored
ATP needs to be present for muscle relaxation
A neurotransmitter is released at the neuromuscular junction
ATP needs to be present for muscle contraction
Chapter 9 Solutions
Seeley's Anatomy & Physiology
Ch. 9.1 - List and describe the functions performed by...Ch. 9.1 - State the functions of smooth and cardiac muscle...Ch. 9.1 - Using table 9.1, distinguish among skeletal,...Ch. 9.2 - Identify the four specialized functional...Ch. 9.2 - Outline the differences in control and function...Ch. 9.3 - Name the connective tissue layers that surround...Ch. 9.3 - What are motor neurons? How do the axons of motor...Ch. 9.3 - What is the origin of muscle fibers? How do you...Ch. 9.3 - What are T tubules and the sarcoplasmic reticulum?Ch. 9.3 - Prob. 10AYP
Ch. 9.3 - Prob. 11AYPCh. 9.3 - Prob. 12AYPCh. 9.3 - Prob. 13AYPCh. 9.3 - Prob. 14AYPCh. 9.3 - Prob. 15AYPCh. 9.3 - Prob. 16AYPCh. 9.3 - Prob. 17AYPCh. 9.4 - What type of ion channel contributes to the...Ch. 9.4 - What are the two types of gated ion channels in...Ch. 9.4 - Prob. 20AYPCh. 9.4 - Prob. 21AYPCh. 9.4 - List the two types of voltage-gated channels the...Ch. 9.4 - Prob. 23AYPCh. 9.4 - Prob. 24AYPCh. 9.4 - Prob. 25AYPCh. 9.4 - Prob. 26AYPCh. 9.4 - Describe the structure of a neuromuscular...Ch. 9.4 - Prob. 28AYPCh. 9.4 - Prob. 29AYPCh. 9.4 - Prob. 30AYPCh. 9.4 - Prob. 31AYPCh. 9.4 - What ion is necessary for movement of the...Ch. 9.4 - Describe the steps in cross-bridge cycling. How is...Ch. 9.4 - Prob. 34AYPCh. 9.5 - List the phases of a muscle twitch, and describe...Ch. 9.5 - Prob. 36AYPCh. 9.5 - Prob. 37AYPCh. 9.5 - Prob. 38AYPCh. 9.5 - Prob. 39AYPCh. 9.5 - How does the lack of on unresponsive period in...Ch. 9.5 - Distinguish between active tension and passive...Ch. 9.5 - Prob. 42AYPCh. 9.5 - Prob. 43AYPCh. 9.5 - What is muscle tone, and how is it maintained?Ch. 9.6 - Contrast the structural and physiological...Ch. 9.6 - Prob. 46AYPCh. 9.6 - Prob. 47AYPCh. 9.6 - What factors contribute to increases in muscle...Ch. 9.6 - Prob. 49AYPCh. 9.6 - Prob. 50AYPCh. 9.7 - What is fatigue? List the three locations where...Ch. 9.7 - Prob. 52AYPCh. 9.7 - Prob. 53AYPCh. 9.7 - List the energy sources used to synthesize ATP for...Ch. 9.7 - Prob. 55AYPCh. 9.7 - Prob. 56AYPCh. 9.7 - Prob. 57AYPCh. 9.7 - Prob. 58AYPCh. 9.8 - Describe a typical smooth muscle cell. How do its...Ch. 9.8 - Prob. 60AYPCh. 9.8 - Prob. 61AYPCh. 9.8 - Compare visceral smooth muscle and multiunit...Ch. 9.8 - Prob. 63AYPCh. 9.8 - Prob. 64AYPCh. 9.8 - How are spontoneous contractions produced in...Ch. 9.8 - Prob. 66AYPCh. 9.8 - Prob. 67AYPCh. 9.8 - Prob. 68AYPCh. 9.9 - Prob. 69AYPCh. 9.9 - Prob. 70AYPCh. 9.10 - Prob. 71AYPCh. 9 - Which of these is true of skeletal muscle? a....Ch. 9 - Prob. 2RACCh. 9 - Prob. 3RACCh. 9 - Each myofibril Is made up of many muscle fibers....Ch. 9 - Prob. 5RACCh. 9 - Which of these statements about the molecular...Ch. 9 - Prob. 7RACCh. 9 - Prob. 8RACCh. 9 - Prob. 9RACCh. 9 - Prob. 10RACCh. 9 - Prob. 11RACCh. 9 - Prob. 12RACCh. 9 - Prob. 13RACCh. 9 - With stimuli of increasing strength, which of...Ch. 9 - Considering the force of contraction of a skeletal...Ch. 9 - Which of these events occurs during the lag...Ch. 9 - Prob. 17RACCh. 9 - Prob. 18RACCh. 9 - Given the conditions: (1) low ATP levels (2)...Ch. 9 - Prob. 20RACCh. 9 - Prob. 21RACCh. 9 - Prob. 22RACCh. 9 - Prob. 23RACCh. 9 - Prob. 24RACCh. 9 - Which of these statements concerning aging and...Ch. 9 - Prob. 1CTCh. 9 - A patient is thought to be suffering from either...Ch. 9 - Design an experiment to test the following...Ch. 9 - Explain what is happening at the level of...Ch. 9 - Predict the shape of an active tension curve for...Ch. 9 - Prob. 6CTCh. 9 - Prob. 7CTCh. 9 - Prob. 8CTCh. 9 - Prob. 9CTCh. 9 - Prob. 10CTCh. 9 - Prob. 11CTCh. 9 - Prob. 12CT
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- Figure 38.37 Which of the following statements about muscle contraction is true? The power stroke occurs when ATP is hydrolyzed to ADP and phosphate. The power stroke occurs when ADP and phosphate dissociate from the myosin head. The power stroke occurs when ADP and phosphate dissociate from the actin active site. The power stroke occurs when Ca2+ binds the calcium head.arrow_forwardSkeletal muscle contraction requires _________. a. calcium ions b. ATP c. arrival of a nerve impulse d. all of the abovearrow_forwardIn a general sense, how do skeletal muscles produce movement?arrow_forward
- The _____ is the basic unit of muscle contraction. a. myofibril b. sarcomere c. muscle fiber d. myosin filamentarrow_forwardYou are training athletes for the 100-meter dash. They need muscles specialized for speed and strength, not endurance. What muscle characteristics would your training regimen aim to develop? How would you alter it to train a long-distance swimmer?arrow_forwardIn the diagram below, label the fine structure of a muscle, down to one of its myofibrils. Identify the basic unit of contraction in a myofibril.arrow_forward
- Depolarization of the sarcolemma means ________. the inside of the membrane has become Less negative as sodium ions accumulate the outside of the membrane has become less negative as sodium ions accumulate the inside of the membrane has become more negative as sodium ions accumulate the sarcolemma has completely lost any electrical chargearrow_forwardWhich of the following statements is true regarding muscle contraction? When a muuscle contracts, the sarcomere remains the same size. When a muscle contracts, the H-zone becomes narrower (shortens). When a muscle contracts, the lighter I-band becomes wider. When a muscle contracts, the A-band shortens.arrow_forwardThe region of the muscle fiber involved in a neuromuscular junction is called the: Group of answer choices Voltage-gated ion channels Synaptic end bulb Synaptic cleft Motor end plate Synaptic vesiclearrow_forward
- Which of the following happens within the sarcomere during muscle contraction? The myosin filaments "walk" along the actin filaments bidirectionally towards the Z lines. The myosin filaments shorten. The actin filaments shorten. The H bands and I bands both increase in width.arrow_forwardWhich of the following does not occur during muscle contraction? Release of calcium into sarcoplasm Unmasking of myosin binding sites on actin Binding of ATP on actin head Shortening of sarcomerearrow_forwardAccording to the sliding filament mechanism of skeletal muscle contraction, during contraction: The thick filaments stay the same size but the thin filaments shorten. The thin filaments stay the same size but the thick filaments shorten. Both thick and thin filaments shorten. The sarcomeres shorten.arrow_forward
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