BIOL 2100 Lecture Notes - Lecture 4: Sliding Filament Theory, Endoplasmic Reticulum, Resting Potential

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scottkeandra

9 Mar 2023

School

GSU

Department

Biology

Course

BIOL 2100

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Answer: thin filaments slide past thick filaments toward the m line: a muscle cell experiencing resting membrane potential is: Answer: cytosol of the muscle cell: the synapse of a motor neuron with a muscle fiber is known as the: Answer: release of calcium from the sarcoplasmic reticulum: during muscle contraction, myosin crossbridges bind to active sites on: Answer: actin: what happens when troponin and tropomyosin block the active sites of actin. Answer: atp, pyruvate, and lactic acid: type i fibers lack: Answer: isotonic eccentric contraction: smooth muscle and skeletal muscle both possess:

Related Questions

Describe the process of skeletal muscle contraction by assembling the following 10 events in the proper order. Your answer must be written in complete sentences- do not just list the letters or the events- write it out. Begin your description with an action potential traveling down a motor neuron and end with the muscle in it's relaxed state.

A) T and T system undergoes a conformational change, exposing the myosin binding sites on actin

B) myosin heads/cross bridges bind to actin and flex, shortening the sacromere

C) the motor neuron triggers an action potential at the neuromuscular junction

D) calcium ions bind to the T and T system

E) actin filaments are pulled toward the center of the sacromere, shortening the muscle fiber

F) muscle fiber is stimulated at the neuromuscular junction

G) myosin head/cross-bridges bind to actin

H) APs travel down the T-tubules to the sarcoplasmic reticulum

I) in response to an AP, calcium ions are released into the cytosol/space around the myofibrils

J) calcium ions actively transported into the sarcoplasmic reticulum

K) myosin head continues to attach, flex, release, extend, and reattach as long as calcium ions are present

lilacporcupine860

Describe the steps of how cross-bridge musclecontractions take place using the followinggeneral information

1) Action potential (generated by motor neuron) innervatesmuscle fiber

2) Motor neuron releases neurotransmitter (travels acrossneuromuscular junction), binds to muscle cell (sarcolemma)

3) Action potential in muscle fiber allows sliding ofmyofilaments (shortening of muscle cells)

Physiology of Exercise

Basic definitions: sarcolemma, sarcoplasmic reticulum, sarcomere, endomysium, perimysium, epimysium, muscle fiber, fascicle, fascia, tendon, myosin, actin, titin, z-disc, cross-bridging, motor unit, neuromuscular junction, synaptic cleft, t-tubule, ATP, myosin ATPase, SR ATPase, Sodium/Potassium pump, action potential, depolarize, repolarize, active transport, diffusion, NAD+, FAD

tealmosquito974

BIOL 2100 Lecture Notes - Lecture 4: Sliding Filament Theory, Endoplasmic Reticulum, Resting Potential

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