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Can muscles in the body contract without calcium?

No, muscles cannot contract without calcium. Calcium ions play a crucial role in the contraction process by binding to troponin, which allows myosin to interact with actin filaments. This interaction is essential for the cross-bridge cycling that leads to muscle contraction. Without calcium, the muscle fibers remain relaxed and unable to contract.


Is nervous an abstract noun?

No, "nervous" is an adjective that describes a feeling of anxiety or unease. Abstract nouns are things you cannot touch or see, like "happiness" or "freedom."


Why can't muscles function individually?

Muscles cannot function individually because they work in coordinated groups to produce movement and maintain stability. This synergy is essential for efficient movement, as one muscle often stabilizes while others contract to create motion. Additionally, muscle groups rely on the nervous system to synchronize their actions, ensuring smooth and controlled movements. Without this coordination, movements would be uncoordinated and inefficient.


Can an axon be stimulated during the refractory period?

No, the axon cannot be stimulated during the refractory period. This period is where the axon is temporarily unable to generate another action potential, ensuring that nerve impulses travel in one direction and allowing the neuron to recover before firing again.


What is occurring when a muscle cell cannot be stimulated during the absolute refractory period?

During the absolute refractory period, a muscle cell cannot be stimulated because it is in a state where it is unable to respond to any stimuli, no matter how strong. This period is caused by the inactivation of voltage-gated sodium channels and the inability to generate another action potential until these channels have returned to their resting state.

Related Questions

Will you die without the nervous system?

There is no question that a human being cannot live without a nervous system.


If a muscle is already at about 80 of its resting length it cannot be stimulated to contract any more because?

the Z lines abut against the thick filaments and cannot go any further


Can you delete everything off your bb curve without deleting your contract?

You cannot delete everything off your bb curve without deleting your contract.


Can a person survive without the sympathetic nervous system?

No a person cannot survive without the circulatory system. This is because, without the circulatory system, # Transport of nutrients to cells cannot take place. # Waste materials from cells cannot be transported to the excretory organs. # Homeostasis cannot be maintained.


Can a car dealership change your contract after it has been signed?

No, a car dealership cannot change your contract after it has been signed. Once a contract is signed, it is legally binding and cannot be altered without the consent of both parties.


What would happen to a muscle's ability to contract if calcium levels within the muscle were low?

Muscles cannot contract without calcium


Can a contract be unilaterally changed by one party?

No, a contract cannot be unilaterally changed by one party without the agreement of the other party.


What law states that muscle fiber cannot partially contract?

The all-or-none law states that muscle fibers cannot partially contract; instead, they either fully contract or remain relaxed. When a muscle fiber is stimulated by a nerve impulse that reaches a certain threshold, it will contract maximally. This law applies to individual muscle fibers, while whole muscles can exhibit varying degrees of contraction through the recruitment of multiple fibers.


How much is a Verizon Alias without a contract?

You cannot get it through Verizon anymore but its 169.99 New.


If a contract is changed without the knowledge of the guarantor is it valid?

A contract is valid when there is a meeting of the minds. Once a contract is signed, it cannot be changed unless written as an addendum and signed by all parties concerned. A verbal agreement cannot override a written agreement.


Your sister and you share a property without your knowledge she has signed a contract with an estate agent is this valid?

If you are equal owners, the contract can only encumber your sister's half interest. She cannot contract to sell your interest.


How much is a Verizon EnV2 without a contract?

You cannot buy it through Verizon anymore. but its 279.99 new.