using actin and mysosin filaments, show a picture of a contracted muscle fiber cell with the appropriate use of ATP or ADP 車 AOO +Ⓡ Extracellular Matrix C یم

In a skeletal muscle if calcium levels in the cytosol increase, as calcium is released from the sarcoplasmic reticulum (SR,) how would this affect the position of the actin and myosin filaments?  Group of answer choices Calcium released from the SR binds to calmodulin. Calmodulin activates myosin light chain kinase, causing cross bridge formation. Calcium released from the SR binds to troponin, moving tropomyosin and allowing for cross bridge formation. Calcium released from the SR binds to troponin, moving tropomyosin and inhibiting cross bridge formation. Calcium released from the SR binds to troponin, causing actin to detach from myosin. pick one answer

Describe the following regions/structures of a sarcomere. (Fig 12.5)    A band - striated patterns of light and dark muscle fibers; scatters light unevenly; uses the entire length of thick filaments; the center of the band uses only thick filaments H zone  I band  M line  Z disc

Which event occurs earlier in time, as compared to the others listed, to bring about skeletal muscle cell contraction? Ca++ release from sarcoplasmic reticulum     Ca++ binding to troponin complex on actin     tropomyosin shifting off the actin filament     activation of ryanodine receptors in S.R.     T-tubule action potential

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 Tropomyosin

Complete the following analogies: Troponin is to skeletal muscle as tropomyosin is to smooth muscle Neuromuscular junction is to skeletal muscle as striations is to smooth muscle Oxidative metabolism is to slow twitch fibers as sliding filament theory is to fast twitch fibers if it is wrong let me know what might be the correct answer.

Figure Q17-57shows an electron micrograph of a skeletal muscle fiber, where various points along a fiber and various regions have been labeled. B Figure Q17-57 Which of the following statements below will happen when a muscle is contracting? Point B will move closer to point C. Region D will become smaller. Region E will shrink in size. D Point A will move closer to point B. E

Refer to the figure below. VI ATP II ADP II ADP ADP (P) Reference: Ref 20-2 In the figure, which panel, taken out of context, represents a state where muscle relaxation could be occurring? Select one: O a. II O b. IV О с. VI

Discuss how calcium is a signaling molecule that causes the contraction of the sarcomere. This discussion should include the molecular mechanisms of tricep contraction. A ▾ B I √ C I U Ꭶ C X₂ C !!! x² Il = = E lılı

Explain the concept of the following in regard to muscle cells: sliding filament movement does not need to be a super indepth answer