The actin myosin bond is broken by the attachment of A. Tropomyosin B. Phosphate C. ATP D. ADP
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The actin myosin bond is broken by the attachment of
A. Tropomyosin
B. Phosphate
C. ATP
D. ADP
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- The _____ is the basic unit of muscle contraction. a. myofibril b. sarcomere c. muscle fiber d. myosin filamentNerve impulses first stimulate a skeletal muscle fiber at _______. a. T tubules b. sarcomeres c. neuromuscular junctions d. actin binding sitesAfter death, a person no longer makes ATP, so calcium stored in the sarcoplasmic reticulum diffuses down its concentration gradient into the muscle cytoplasm. This result is rigor mortis----an unbreakable state of muscle contraction that stiffens the body for a few days until muscles begin to decay. Explain why this contraction occurs.
- Thick Filaments contain OA. Actin OB. Troponin OC. Tropomyosin O D.Myosin Kinase OE. None of the aboveHydrolysis of ATP to ADP+P; causes the dissociation of actin from the Myosin head and is called these two stages result in myosin movement along the actin filaments. O Head cocking; treadmilling O Head cocking: power stroke O Power stroke; head cocking Power stroke; treadmilling while the release of P₁ that leads to re-coiling of the myosin head is called Together,During sarcomere shortening myosin gets shorter actin gets shorter A-band gets shorter • H-zone gets shorter more than one of the above is correct
- This thick filament motor protein composed of 6 polypeptide chains uses ATP hydrolysis to interact creating a powerstroke for skeletal muscle contractions. A Myosin B Actin C Titin D TropomyosinWhich of the following are correct Dynein head elongates like a lever arm. ATP hydrolysis detaches myosin from actin Myosin slides over both thick and thin actin filaments ATP hydrolysis drives change in conformation of the myosin head.Actin filaments in microvilli require the help of myosin so that they can associate with the microvilli cellular membrane. What type of myosin is utilized for membrane association? Myosin VII Myosin II O Myosin I O Myosin VI
- In the absence of O Ca2+; Tropomyosin and Tropomodulin the myosin binding sites in the actin microfilament are masked by O ATP: Tropomyosin and Troponin ATP: Cofilin and Profilin OCa2+; Tropomyosin and Troponin PreviousWhich of the following is NOT true regarding actin? O It contains troponin and tropomyosin O It is a thin myofilament O It's arranged with two heads and a tail O All of these are correctZAV : ۱۲:۵۲م سبت ۳ نیسان docs.google.com a The functions of tropomyosin in skeletal muscle include sliding on actin to produce shortening releasing Ca2+ after initiation of contraction. binding to myosin during contraction. acting as a "relaxing protein" at rest by covering up the siteswhere myosin binds to actin generating ATP, which it passes to the contractilemechanism. Which of the following is the proper progression of the levels of organization in the body? chemicals, cells, organs, tissues, body systems, whole body chemicals, cells, tissues, organs, body systems, whole body cells, chemicals, tissues, organs, whole body, body systems cells, chemicals, organs, tissues, whole body, body systems O chemicals, cells, tissues, body systems, organs, whole body working as barriers that restricts the movement of protein and other molecules from the underlying connective tissue into the epithelium Basement membrane Epithelial tissue Dermis Microvilli Back Next Never submit passwords…