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What is the period of altered excitability when the heart may respond to a weaker than normal stimulus?
Wiki User
∙ 11y ago
The Relative Refractory Period
Wiki User
∙ 11y ago
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The most distinguishing characteristic of muscle tissue is?
Excitability = the ability to receive and respond to a stimulus Contractility = the ability to shorten Extensibility = the ability to be stretched Elasticity = the ability to resume normal length after contraction or having been stretched.
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When a Stingray reacts to stimulus it discharges stinging cells. The stinging cells penetrate the skin and inject a poisonous venom.
What are the four main special functional abilities of muscle that are the basis for muscle response?
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REM is a stage of sleep, characterized by rapid eye movements, that occurs when we are dreaming. In that sense it is an altered state, although perfectly normal.
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Stem Cells cause Cancer!!
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It doesn't need to involve the brain.
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No, it is not. Flip Summons and Normal Summons are different things. Some cards can respond to both, but some can only respond to Normal Summons, and if so, cannot be used against Flip Summons.
How are a stimulus and a response related?
They are directly related. Homeostasis is an environments ability to maintain stbility in a regular cycle, but when something new is introduced, the environment is able to respond to a new occurance, or stimulus, and responds in order to survive and return to maintaining a normal cycle. Without response to a new stimulus, environments would be unable to maintain homeostasis and would die out!
Can you give two functions of calcium?
Calcification of bones and teeth-important 4 blood clotting and normal heart excitability and contractility and it z used in treatment of allergy as it decreases cell membrane permeability
During which period can a second action potential be initiated by a larger than normal stimulus?
This the relative refractory period.
Why is it only possible to induce an extrasystole during relaxation?
The cardiac muscle is incapable of reacting to any stimulus before approximately in the middle of phase 3. It will not react to a normal cardiac stimulus before phase 4.
What is the supranormal period cardiovascular?
Supranormal Period (SNP) is the period during which a slightly smaller than normal stimulus can elicit a propagated response, although the amplitude of the action potential is reduced compared to normal. I'm not sure either as of to how the mechanism of this allows a stimulus lower than threshold can elicit this response.
