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Nerve impulses that originate in the central nervous system cause muscles to contract. Muscle fiber generates tension during the action of actin and myosin cross-bridge cycling. While under tension, the muscle may lengthen, shorten, or remain the same.
What else can I help you with?
Does a heart run on electricity?
Yes. Electrical signals to the cardiac muscle causes the heart to relax and contract.
Which type of muscles causes the heart to contract and relax?
auto-rhythmic cardiac muscle
How is current electricity dangerous?
Current causes muscles to contract and that is dangerous especially if the heart muscle is affected.
Is the heart involuntary or voluntary?
the heart is and involuntary muscle because you cannot contract the muscle.
Why do they say that the heart is a muscle?
Because your heart is a muscle, a cardiac muscle. a muscles job is to contract an that is exactly what the heart does, it contracts to pump blood.
What event stimulates the contraction of cardiac muscle?
The event that stimulates the contraction of cardiac muscle is the electrical signal generated by the sinoatrial (SA) node in the heart, also known as the pacemaker of the heart. This signal causes the heart muscle cells to contract and pump blood throughout the body.
What is the specific function of the cardiac muscle?
contraction of the atria and ventricle of the heart, causes beating of heart.
What causes a muscle to lose its ability to contract?
Muscle loss. Have you not been eating?
What muscle contract without voluntary thought?
heart
What initiates the contraction of cardiac muscle?
The contraction of cardiac muscle is initiated by electrical signals from the heart's natural pacemaker, the sinoatrial node, which causes the muscle cells to contract in a coordinated manner, pumping blood throughout the body.
Do all cardiac muscle fibers all contract at the same time?
No. The heart muscle contracts in sections, first the top (atrium) then the bottom (ventricle). But when it is working properly, the heart muscle fibers contract together in large groups.
What type of muscle is a heart?
The heart or "Cardiac muscle" is myogenic meaning that it will independently contract without a stimulus. The nerve impulses in the heart are merely to regulate the natural beat of the heart.
