Tag Info

New answers tagged

0

The Latent period is caused by: Time taken for the stimulus to travel along the nerve to the neuromuscular junction Time taken for the impulse to cross the neuromuscular junction and to stimulate the muscle Time taken for the excitation-contraction coupling to occur Time taken by the lever to overcome the inertia of rest Time taken to overcome the vicous ...


6

Short answer Proprioceptic receptors provide a feedback mechanism from the body to the brain, telling the brain what our limbs are doing and where they are with respect to the body without visual feedback being needed. Background Muscles, skin and joints contain proprioceptic receptors. They sense position and movement of our limbs and trunk, they register ...


-1

Yawning increases pressure in eustachian tube because it takes place during inspiratory phase of respiration, so pushes Ear drum on the outer side


1

If we're looking at diagrams for the t-tubule with respect to the sarcolemma, we see the two are actually fused: The function therein is to allow depolarization to penetrate the interior of the cell quickly. The surface isn't transected anywhere, it simply folds inward. You can visualize this by sort of pushing a hole through some putty with a finger, ...


6

The muscle spindle normally stretches/contracts in concert with the muscle fibres in order to maintain detection of changes in length. This image should demonstrate it clearly: When the muscle spindle is stretched and excited it sends impulses to the spinal cord more rapidly (increased frequency). The sensory neurons synapse with alpha motor neurons ...


2

I was able to do some reading and research and I found some interesting information that was a). news to me. And b). the answer is yes... And no. A spasm can be the cause of a heart attack by causing the coronary artery to contract. When that artery contracts, it causes a dramatic decrease in blood flow to the heart. When the heart looses access to ...


3

The action potential causes Ca2+ ions to be released in the cells, that is needed for muscle fiber contraction. There is a small time delay from the arrival of the action-potential until the Ca-ions are released and reach the required concentration in the cell for contraction. On the molecular level there is a protein called troponin (this is bacically ...



Top 50 recent answers are included