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When the radial muscles of the iris contract, what effect does this have on the size of the pupil?
When the radial muscles of the iris contract, the pupil dilates or becomes larger.
During eupnea, which muscles contract to facilitate expiration?
During eupnea, the diaphragm and external intercostal muscles contract to facilitate expiration.
Do your respiratory muscles contract each time you exhale?
Yes, your respiratory muscles contract each time you exhale to push air out of your lungs. The diaphragm and intercostal muscles are involved in this process.
Why do muscles shorten when they contract?
Muscles shorten when they contract because the muscle fibers within the muscle bundle slide past each other, causing the muscle to contract and pull on the attached bones, resulting in movement.
What does it mean when muscles contract and how does this process occur in the body?
When muscles contract, they shorten and generate force. This process is controlled by the nervous system, which sends signals to the muscles to release calcium ions. These ions bind to proteins in the muscle cells, causing them to slide past each other and contract. This contraction allows the muscles to produce movement and perform various functions in the body.
What are the roles of muscles?
The role of muscles in our body is enabling us to move our body, whn stimulated by a nerve. Muscles can contract as your brain tells them to. With out our muscles we would not be able to make any movements.
If your brain tells your leg muscles to contract what carries the message to the leg muscle?
the nerves and the nervous system
What happens during isokinetic exercise Muscles contract at a constant rate. Muscles contract and relax to move a joint. Muscles do not contract at all. Muscles contract with very little body movement.?
Muscles contract and relax to move a joint. ... Muscles contract at a constant rate. Muscles contract and relax to move a joint.
What muscle can do?
Muscles can contract and shorten
How do muscles contract and relax?
muscles contract and relax by bring about movements.
What two ways do muscles work?
They contract and relax
What happens if the papillary muscles fail to contract?
If the papillary muscles fail to contract the valves will prolapse. The papillary muscles are located in the ventricles and contract to prevent prolapse.
Does the nervous system transmit information that tells your muscle and otherinternal organs how to react?
The nervous system does not tell muscles how to react. The nerves transmit electrical pulses that make muscles contract. Different nerves attached to different muscles strands control how a muscle reacts. For example, nerves going to some arm muscles when they contract may make your elbow bend. Nerves going to a different set of muscles when made to contract may make your arm straighten out at the elbow. Using all muscles in that area allows you to maintain a bent elbow in a specific position.
Can you contract your smooth and cardiac muscles on purpose?
Smooth Muscles can, but Cardiac Muscles can not.
When muscles shorten they.?
contract
When muscles contract what do they do?
Shorten
Are nerves needed for muscles to contract?
Yes, without the nerves the muscles would be rendered useless. The muscles MUST have stimulation from somehwere in order to contract.
