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What is a group of cells located in the right atrium that send out signals that you make the heart muscle contract or beat?
Wiki User
∙ 10y ago
The sinoatrial node, or SA node. This group of cells initiate the electrical impulse through the heart in a normal heart rhythm, also called a normal sinus rhythm.
Impulses can begin in other areas of the heart, but this typically causes an irregular heart beat.
Wiki User
∙ 10y ago
Anonymous
Pacemaker
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When the nervous system signals a muscle to contract what ion channels open?
sodium ion
Small group of cardiac muscle cells that sets the pace for the heart?
the sinoatrial node; located in the right atrium.
The only tissue in youur body that is able to contract or shorten?
All types of Muscle tissue contract... This includes Skeletal and Smooth muscle tissue.
Why do skeletal muscle cells need to be physically connected to the outside environment?
Skeletal muscle cells need to be physically connected to the outside environment to receive signals from the nervous system and to contract in response to those signals. The physical connection allows for the exchange of nutrients, waste removal, and the delivery of oxygen to the muscle cells. Additionally, the connection allows for the removal of heat generated during muscle contractions.
How do muscles get signals from the brain?
Brain sends signal through spinal cord to nerves. Nerves contract which muscle to move and sends a message back to the brain. BOOM! Movement.
What channels open when the nervous system signals a muscle to contract?
sodium ion
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.
When the nervous system signals a muscle to contract what ion channels open?
sodium ion
When a nerve signals a muscle to contract where is calcium released?
calcium released by sarcoplasmic reticulum.
When the nervous system signals a muscle to contract the ion channels open?
sodium ion
Does a heart run on electricity?
Yes. Electrical signals to the cardiac muscle causes the heart to relax and contract.
Can you find muscle tissue in plants?
yes because their is signals that contract from the brain to make the muscles move
What is the location of the mitral valve?
It is the valve that lies between the left atrium and the left ventricle in the heart.
Small group of cardiac muscle cells that sets the pace for the heart?
the sinoatrial node; located in the right atrium.
How does heart rate counters work?
These work by picking up electrical signals that are released when the heart muscle cells contract.
What organs are needed to make the muscular system work?
You need your brain to send signals to a skeletal muscle telling it to contract.
What feeds your muscles so that they can contract?
Your body produces a source of energy from food. It is called ATP. This is what your muscles use to contract. The signals are sent through a simple structure. The electronic signals from your brain travel through a gap in between your muscle and your nerves.
