Answer:
The sense organs contain groups of specialised cells called receptor cells which produce electrical impulses in response to specific stimuli.
Explanation:
Answer:
C. tetanic contractions might occur, which would stop the heart's pumping action.
Explanation:
The absolute refractory period of the cardiac muscle action potential refers to the time interval when the voltage gated sodium channels are inactivated. The absolute refractory period lasts ~180 msec. The action potential lasts 200-220 msec.
The refractory period of cardiac muscle is dramatically longer than that of skeletal muscle. This prevents tetanus from occurring and ensures that each contraction is followed by enough time to allow the heart chamber to refill with blood before the next contraction.
In order words, It is important for the cardiac muscle cells to have a longer refractory period, because if they were short like the skeletal muscles, the heart could enter tetanic contraction/summation which is when muscle is stimulated so rapidly that it does not have a chance to relax at all between stimuli.
General growth media serves the purpose of generating more bacteria colonies to create enough samples to identify to perform other tests. Differential media is used to differentiate species or subspecies of bacteria by how they differentially react to the dyes of chemicals in the media due to differences in metabolic properties of the different bacteria species. An example of differential media is MacConkey agar.
Answer:
No lo hacemos.
No lo sabemos todo.
Sólo el 5% del océano se explora así que estoy bastante seguro de que va a tomar mucho tiempo antes de que se descubra el mundo entero.
Most frequently, a tornado develops when a mass of cold, dry air crosses over a quantity of warm, moist air, creating huge storm clouds in the process.
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How a tornado form?</h3>
The creation of a storm, which in turn promotes the development of a tornado, is what causes tornadoes, which are primarily continental phenomena, to originate. This happens when cold fronts move into areas where the air is warmer and more unstable.
These movements in this instance are caused by the convergence of hot and cold air currents, which results in a spinning area of pressure.
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