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Muscle fibers generates throught the action of actin and myosin.
Contraction of Voluntary muscles occurs as a result of conscious effort originating in the brain. The brain sends signals, in the form of action potentials,through the nervous system to the motor neuron that innervates the muscle fiber.
Involuntary muscles like the heart or smooth muscles in the gut contracts as a result of unconscious brain activity stimuli endogenous to the muscle itself.
Wiki User
∙ 12y ago
Wiki User
∙ 12y agowhat substance is required as a trigger for muscle contractions
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Role of ionic calcium in muscle contraction?
triggers neurotransmitter secretion, removes contraction inhibitor, and binds with troponin.
The calcium that triggers muscle contraction is stored in?
he endoplasmic reticulum -mastering bio
The impulse that triggers a contraction travels deep into a muscle fiber by means of what?
transverse tubules
What usually triggers muscle fibers to contract or relax?
The contraction is triggered by the release of calcium within the muscle which is triggered by an electrical signal from a nerve.
What is muscle contraction without muscle shortening is what kind of contraction?
Isometric contraction
Constant contraction of a muscle is?
constant contraction of a muscle is called the muscle tone
Why is that electrical impulses cannot pass from neuron to muscle cell?
The synapse, or connection, between a neuron and striated muscle is typically a chemical one called the neuromuscular junction. The pre-synaptic terminus coming from the neuron releases acetylcholine (ACh) which triggers an opening of the ionic channels on the muscle side. The depolarization triggers calcium entry into the cytosol of the muscle and contraction.
During contraction of the heart muscle cells?
some calcium enters the cell from the extracellular space and triggers the release of larger amounts of calcium from intracellular stores
What is a concentric contraction?
concentric contraction is atype of muscle contraction which the muscle shortens while genrating aforce The muscle shortens to produce movement. A muscle contraction in which shortening occurs.
What does the contraction of the gastrocnemius muscle usually result in?
type of contraction of gastrocnemius muscle?
Describe the events of muscle cell contraction?
6 steps in a muscle contraction
What is the difference between isotonic and isometric contractions?
An Isotonic muscle contraction is a muscle contraction that makes your limbs move whereas an Isometric contraction is a muscle contraction where the limbs stay static
