0
Want this question answered?
Be notified when an answer is posted
Add your answer:
Earn +20 pts
Which ion is stored in the sarcoplasmic reticulum?
Calcium ions are stored in the sarcoplasmic reticulum of muscle cells. These ions play a crucial role in muscle contraction by triggering the release of more calcium ions into the muscle cell, leading to the contraction of the muscle fibers.
What is the function of troponin in muscle contractions?
It is involved in the regulation of the contraction of a cross-striated muscle.
What chemical reactions occur in the muscle during latent period of muscle contraction?
During the latent period of muscle contraction Ca++ is being released from the sacroplasmic reticulum and filament movement is taking up slack. This takes approx. 2 milliseconds.
What is essential cations in muscle contraction?
Essential cations in muscle contraction are calcium (Ca2+), sodium (Na+), and potassium (K+). These cations play crucial roles in the excitation-contraction coupling process by regulating the movement of muscle fibers and the release of neurotransmitters at the neuromuscular junction.
In muscle contraction calcium apparently acts to?
Muscle contraction is regulated by calcium ions, which will change thin filament into an activated state by binding to troponin. The binding of calcium to the troponin changes it's shape so the myosin binding sites on the actin (thin filament) are exposedbind to regulatory sites on troponin to remove contraction inhibition
What relaxes muscles more ACh or calcium ions?
I'll assume you mean in the extracellular space, and not inside the muscle cells. Acetylcholine is the neurotransmitter released from motor end-plates to trigger muscle contraction. So it anything BUT relaxes muscles. High levels of Ca ions on the other hand, make the muscle fibers unable to respond to stimuli, so effectively relax the muscle. (Intracellular Ca release causes contraction though!)
What is the ion called that triggers muscle contractions?
There are several, but a calcium ion is one that is used in skeletal muscle contraction.
What kind or stretching facilitates an increase in muscle length through a maximum isometric contraction of the antagonist?
CA stretching - Contract Antagonist - Relax Method
What is element 20 on the periodic table?
Element 20 on the periodic table is calcium. It is a soft gray alkaline earth metal that is essential for living organisms. Calcium plays a crucial role in various bodily functions, such as bone structure, muscle contraction, and nerve function.
What does Ca on the periodic table stand for?
Ca on the periodic table stands for calcium. It is a chemical element with the atomic number 20 and is commonly found in bones, teeth, and dairy products. Calcium plays a crucial role in various biological processes in the body, including muscle contraction and nerve signaling.
What happens during skeletal muscle contraction?
During skeletal muscle contraction, motor neurons activate muscle fibers, causing calcium ions to be released from the sarcoplasmic reticulum. The calcium ions bind to troponin, leading to the exposure of active sites on actin filaments. Myosin heads then attach to these active sites, form cross-bridges, and pull the actin filaments towards the center of the sarcomere, resulting in muscle contraction.
What are the requirements of muscle contraction?
Essential elements (as in elements pharmacologically) would be Na (Sodium) and Ca (Calcium) - not including Chlorine as muscle twitches occur without innovation of somatic motor neuron. If your not talking about a twitch you may possibly also include chlorine.. The influx of Na (sodium) into the muscle cell initiates the muscle's generation of an Action potential, which then travels down the T-Tubules, triggering the influx of Ca (Calcium) into the sarcomere (muscle cell cytoplasm). The Ca then binds to tropoponin (receptors on tropomyosin) which the 'calcium tropoponin' complex then pulls the tropomyosin causing the revealance of Myosin binding site. ATP comes and causes myosin heads to lift and bind to actin - filaments move toward M line - u have a muscle contraction.
