Homework Answers
Sarcomere
It is the funcional unit of muscular contraction.
It is the basic unit that makes up the skeletal muscle,skeletal muscles help to initiate the voluntary movement in the body.
The skeletal muscle shows a stripped apperrance,this stripped appearance is due to alternating light and dark bands corresponding to different protein filaments.These strips are formed by the interlocking fibres that comprise each sarcomere.
Tubular fibres known as myofibrils are the basic component that forms the muscle tisuue.
When a muscle contracts ,the filaments in the sarcomere slide past eachother thereby shortening the length of the sarcomere whereas when a muscle relaxes,the filaments come back to their original position.
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Question 68 What is the sarcomere Provides energy for muscular contraction It acts to allow the...
30. What protein based, muscular structure is NOT an essential component of the thin filaments of a sarcomere as per the...
30. What protein based, muscular structure is NOT an essential component of the thin filaments of a sarcomere as per the sliding filament theory model of contraction? a. Actin c. Troponin b. Myosin d. Tropomyosin 31. Skeletal muscle’s inherent ability to contract and stretch while still continuing to return to its original length is known as: a. Extensibility c. Contractility b. Elasticity d. Excitability 32. Which of the following is NOT a muscle of the lower appendicular muscle system? a....
NAME SID 25. Usted below are different steps that occur during the excitation and contraction of...
NAME SID 25. Usted below are different steps that occur during the excitation and contraction of a muscle fiber. Please select the correct sequence in which these stages occur. 1) Ca2+ binds to Tropomyosin, causing a conformational change that unblocks cross-bridge binding sites. 2) The Sarcoplasmic Reticulum is depolarized, which opens up Voltage-Gated Channels that release Ca2+ into the cytoplasm. 3) The Action Potential then travels along the cell membrane and down transverse tubules that extend into the muscle fiber....
Describe and/or illustrate the shortening of a muscle fiber. What provides the energy for this reaction?...
Describe and/or illustrate the shortening of a muscle fiber. What provides the energy for this reaction? Where does the force of the contraction come from? What is important about the organization of myosin and actin in the fibers that allow muscles to exert so much force? What regulates the process of muscle contraction?
Question Completion Status: QUESTION 1 The neurotransmitter released at the neuromuscular junctio...
Question Completion Status: QUESTION 1 The neurotransmitter released at the neuromuscular junction to signal a muscle contraction is broken down by calicuase norepinephronase neuroglibin acetylcholinesterase QUESTION2 Exocytosis of the neurotransmitter at the neuromuscular junction requires activation of O voltage-gated calcium channels O chemically gated potassium channels O voltage gated sodium channels 0. chemically gated sodium channels Save All Answers 20 Dll F8 oD 69 F5 F6 F7 QUESTION 3 The H-zone of the A band of a sarcomere consists of:...
66) The successful transmission of a nervous impulse to a muscle fiber leads to the release...
66) The successful transmission of a nervous impulse to a muscle fiber leads to the release of Calcium (Ca2+) from the Sarcoplasmic Reticulum. The role of Ca2+ in muscle contraction is: Bind to myosin, which cleaves ATP such that energy can be input into the myosin “heads”, allowing it to perform a power stroke needed to move actin. Ca2+ acts in a process that breaks up actin filaments, removing subunits to make them shorter and thus leading to the contraction...
13. During skeletal musele contraction, whet substance does the sarcoplasmic reticulum store and release? A. acetyicholine...
13. During skeletal musele contraction, whet substance does the sarcoplasmic reticulum store and release? A. acetyicholine B. sodium D. calcium 34. What stimalates the sarcoplasmic reticulum (SR) to release this chemical? A. the voltage change from the muscular action potential traveling down the transverse (1) tubules B. the binding of acetylcholine to ligand-gated channels in the transverse tubules C. direct stimulus from the neural action potential D, the binding of myosin to actin 35. Transverse (T) tubales are extensions of...
Name Lab Partner 1. Part A Match the term with its correct description A. Sarcolemma B....
Name Lab Partner 1. Part A Match the term with its correct description A. Sarcolemma B. Sarcomere C. Sarcoplasm D. Sarcoplasmic reticulum E. Endomysium F. Perimysium G. Epimysium H. Fascicle 1. Tendon Attaches muscle to bone Component of thick filament Component of thin filament Cytoplasm of a muscle cell Functional unit of a myofibril Cell membrane of a muscle cell Bundle of muscle fibers Produces ATP for muscle contraction Connective tissue that surrounds an individual muscle fiber Connective tissue that...
Multiple choice questions-Tor tes scantron questios s In a sarcomere, cross-bridge formation occurs specifically in the...
Multiple choice questions-Tor tes scantron questios s In a sarcomere, cross-bridge formation occurs specifically in the 5. Skeletal muscle fibers are formed from embryonic cells calledwhich fuse together, making skeletal muscle cells multinucleated. 1. a. sarcomeres b. myofibrils c. myoblasts d. fascicles a. Z line. b. I band c. M line. d. H band e. zone of overlap. 6. Titin is a(n) a. elastic protein. b. thin filament protein. 2. A thin layer of connective tissue that surounds a muscle...
What prevents two antagonistic muscles from contracting simultaneously? O Polysynaptic reflexes The myotatic reflex Muscle spindles...
What prevents two antagonistic muscles from contracting simultaneously? O Polysynaptic reflexes The myotatic reflex Muscle spindles Reciprocal inhibition QUESTION 2 Motor neurons communicate to muscle at the: neurofiber synapse muscle spindle polar junction neuromuscular junction QUESTION 3 What is responsible for initiating muscle contractions? Actin Sarcomeres Acetylcholine Myofibrils QUESTION 4 the thick filament that moves along the thin filament. Myosin, actin M line, Z line Z line, M line Actin, myosin QUESTION 5 move nutrients through the digestive tract and...
236 UNIT 12 introduction to Muscularsstern MusceTissue 2. Match each of the following terms with its...
236 UNIT 12 introduction to Muscularsstern MusceTissue 2. Match each of the following terms with its description/function: transverse tubule l. connective tissue wrapping around a muscle fiber sarcoplasmic reticulum 2. organelle packed with myofilaments epimysium transverse tubule and its flanking terminalcisternae d. thin filament 4 invagination of the sarcolemma 5. connective tissue wrapping around fascicle myofibril 6. the region of sarcolemma across from the axon terminal f triad at the neuromuscular junction endomysium 7. consists of actin, troponin, and tropomyosin...
NAME SID 25. Usted below are different steps that occur during the excitation and contraction of a muscle fiber. Please select the correct sequence in which these stages occur. 1) Ca2+ binds to Tropomyosin, causing a conformational change that unblocks cross-bridge binding sites. 2) The Sarcoplasmic Reticulum is depolarized, which opens up Voltage-Gated Channels that release Ca2+ into the cytoplasm. 3) The Action Potential then travels along the cell membrane and down transverse tubules that extend into the muscle fiber....
Question Completion Status: QUESTION 1 The neurotransmitter released at the neuromuscular junction to signal a muscle contraction is broken down by calicuase norepinephronase neuroglibin acetylcholinesterase QUESTION2 Exocytosis of the neurotransmitter at the neuromuscular junction requires activation of O voltage-gated calcium channels O chemically gated potassium channels O voltage gated sodium channels 0. chemically gated sodium channels Save All Answers 20 Dll F8 oD 69 F5 F6 F7 QUESTION 3 The H-zone of the A band of a sarcomere consists of:...
13. During skeletal musele contraction, whet substance does the sarcoplasmic reticulum store and release? A. acetyicholine B. sodium D. calcium 34. What stimalates the sarcoplasmic reticulum (SR) to release this chemical? A. the voltage change from the muscular action potential traveling down the transverse (1) tubules B. the binding of acetylcholine to ligand-gated channels in the transverse tubules C. direct stimulus from the neural action potential D, the binding of myosin to actin 35. Transverse (T) tubales are extensions of...
Name Lab Partner 1. Part A Match the term with its correct description A. Sarcolemma B. Sarcomere C. Sarcoplasm D. Sarcoplasmic reticulum E. Endomysium F. Perimysium G. Epimysium H. Fascicle 1. Tendon Attaches muscle to bone Component of thick filament Component of thin filament Cytoplasm of a muscle cell Functional unit of a myofibril Cell membrane of a muscle cell Bundle of muscle fibers Produces ATP for muscle contraction Connective tissue that surrounds an individual muscle fiber Connective tissue that...
Multiple choice questions-Tor tes scantron questios s In a sarcomere, cross-bridge formation occurs specifically in the 5. Skeletal muscle fibers are formed from embryonic cells calledwhich fuse together, making skeletal muscle cells multinucleated. 1. a. sarcomeres b. myofibrils c. myoblasts d. fascicles a. Z line. b. I band c. M line. d. H band e. zone of overlap. 6. Titin is a(n) a. elastic protein. b. thin filament protein. 2. A thin layer of connective tissue that surounds a muscle...
What prevents two antagonistic muscles from contracting simultaneously? O Polysynaptic reflexes The myotatic reflex Muscle spindles Reciprocal inhibition QUESTION 2 Motor neurons communicate to muscle at the: neurofiber synapse muscle spindle polar junction neuromuscular junction QUESTION 3 What is responsible for initiating muscle contractions? Actin Sarcomeres Acetylcholine Myofibrils QUESTION 4 the thick filament that moves along the thin filament. Myosin, actin M line, Z line Z line, M line Actin, myosin QUESTION 5 move nutrients through the digestive tract and...
236 UNIT 12 introduction to Muscularsstern MusceTissue 2. Match each of the following terms with its description/function: transverse tubule l. connective tissue wrapping around a muscle fiber sarcoplasmic reticulum 2. organelle packed with myofilaments epimysium transverse tubule and its flanking terminalcisternae d. thin filament 4 invagination of the sarcolemma 5. connective tissue wrapping around fascicle myofibril 6. the region of sarcolemma across from the axon terminal f triad at the neuromuscular junction endomysium 7. consists of actin, troponin, and tropomyosin...
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