Answer:
In nature, there are a number of useful soil micro organisms which can help plants to absorb nutrients. Their utility can be enhanced with human intervention by selecting efficient organisms, culturing them and adding them to soils directly or through seeds. The cultured micro organisms packed in some carrier material for easy application in the field are called bio-fertilisers. Thus, the critical input in Biofertilisers is the micro organisms.
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.
Answer:
As far as i know, it's when the nerves at the top of your mouth (or the roof) sense the cold.
Explanation:
This is different to you sensing cold in your fingers or other parts of your body as it is closer to the roof of your mouth making your nerve feel much more. Since those nerves are exposed to that cold so much more than most other parts (and are closer to the brain, which i'm not sure if it affects anything) you feel a freeze which most people think they feel at their brain, hence the name 'Brain freeze'
Hope it helps!
Answer:
0° latitude
Explanation:
The Equator, at 0° latitude, receives a maximum intensity of the sun's rays all year.
