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Muscle contraction is triggered by impulses carried over what?
Wiki User
∙ 10y ago
when ATP attaches to the myosin heah
Wiki User
∙ 10y ago
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What is the job of a muscle cell?
Receive stimulatory impulses to contract and inhibitory impulses to stop contraction from the neuromuscular junction. This contraction is carried out by Ca2+, ATP and the actin and myosin proteins in the cells, forming a sarcomere. By contracting and relaxing as a syncytium, the leg muscle can control the joint(s) it crosses and produce movement.
What is the job of a leg muscle cell?
Receive stimulatory impulses to contract and inhibitory impulses to stop contraction from the neuromuscular junction. This contraction is carried out by Ca2+, ATP and the actin and myosin proteins in the cells, forming a sarcomere. By contracting and relaxing as a syncytium, the leg muscle can control the joint(s) it crosses and produce movement.
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 minerals are needed for muscle contraction and conduction of nerve impulses?
phosphorous.
How does neuronal firing cause muscle contraction?
When a neuron in a muscle is fired, or triggered, it sends a message to the brain telling the muscle to contract.
What characterizes the normal operation of the heart?
each part contracts in a specific order. Contraction of the muscle is triggered by an electrical impulse. These electrical impulses travel through specialized cells that form a conduction system. Following this pathway ensures that contractions will
Why does tetradotoxin lead to death?
It blocks the channel for sodium on the sceletal muscle and inhibits therefor the transmission of electrical impulses that are necessary for muscle contraction
What is the state of slight contraction present in healthy muscles?
The continuous partial contraction of muscle is called muscle tone
Heart excitation nerve impulses that result in heart muscle contraction originates in?
the pacemaker area or the sinoatrial node
Which one of these does not require energy is it synthesis of protein or transmission of nerve impulses or tissue respiration or muscle contraction?
tissue respiration.
Describe the location and action of a pacemaker?
Pacemaker is located in the right atrium and generates electrical impulses to start a muscle contraction in the heart.
Why is it important for cardiac muscle cells to be branched and interconnected with other cardiac muscle cells?
so electrical impulses can be carried freely between cells
