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Muscle contraction in the leg is caused by the interaction between nerve signals from the brain and the muscle fibers. When the brain sends a signal to the muscle, it triggers the release of calcium ions, which then bind to proteins in the muscle fibers, leading to the contraction of the muscle.
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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.
The two neurotransmitters that affect smooth muscle cells are acetylcholine and?
norepinephrine. Acetylcholine mainly causes smooth muscle contraction, while norepinephrine can either cause contraction or relaxation depending on the type of receptor it binds to on the smooth muscle cell.
The contraction of a muscle exerts a pull on a bone because?
the muscle is attached to the bone via tendons, which transmit the force generated by the muscle contraction to the bone. This pull causes the bone to move, allowing for various types of body movements like walking or lifting objects.
Also found in a milk y laxative what mineral helps prevent muscle spasms and leg cramps?
The mineral found in milk and laxatives that helps prevent muscle spasms and leg cramps is calcium. Calcium plays a crucial role in muscle contraction and relaxation, and a deficiency can lead to muscle cramps and spasms.
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.
A contraction that causes a muscle to lengthen rather than shorten is called?
An eccentric contraction is one that causes a muscle to lengthen.
What type of muscular contraction is leg extension?
There are 3 types of muscle contraction in the leg extention and they are Concentric, Isometric, and Eccentric contractions.
What type of muscle is capable of rapid contraction and causes skeletal movement?
Skeletal or voluntary muscle is capable of rapid contraction and is responsible for skeletal movement.
What conditions cause contractions of arteriole smooth muscle?
Asthma causes contraction of the bronchial smooth muscle.
Contraction of a muscle resulting in its shortening?
A muscular contraction that causes a muscle to shorten is called a concentric contraction. A concentric contraction is a type of isotonic contraction.
Contraction of the ciliary muscle causes the lens to bend the light less?
false
What type of cellular respiration causes muscle contraction?
Aerobic cellular respiration produces energy for muscle contraction but this is not what causes the contractions. The binding properties between the proteins actin and myosin are what give muscles the ability to contract.
Which muscle generally remains in a state of partial contraction when your legs are straight?
Your quadriceps femoris are generally in a state of partial or full contraction if the leg is completely or somewhat straight.
Does contraction of the dartos muscle cause elevation of the testes?
No, contraction of the dartos muscle causes wrinkling of the scrotal skin to regulate temperature, but it does not directly cause elevation of the testes. Elevation of the testes is primarily controlled by the cremaster muscle.
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.
What is a reflect muscle?
It is a muscle reflex. A very fast, involuntary muscle contraction. Because of this, it causes you to jerk your hand away after touching a hot iron.
What muscle generally remain in a state of partial contraction when you are keeping your legs straight?
The quadriceps femoris are naturally in a state of partial or full contraction if the leg is completely or somewhat straight.
