While waiting for a signal to contract, a muscle cell membrane will maintains a slightly higher positive charge on the OUTSIDE of the membrane. This is possible only because SODIUM POTASSIUM ATPASE pumps are available to generate this charge difference.
The ion concentration difference across the plasma membrane set up electric signals called action potentials which cause a muscle cell to contract.
Sometimes Loud music has an affect on hearing because it depends on how much you clean your ears. The wax in your ear is a lipid which is a thick oil that protects your ear drum
This is because pediatric patients have a high body surface area, to the body weight ratio. I hope that this helps you!
300 BC by Greek philosophers
Answer:
1. D- Within cultures that rely on milk-producing animals, individuals who tolerated lactose had a survival advantage.
2. B- Genetic drift is the random increase or decrease of certain genes in a population; natural selection is not random.
3. A- An interferon activates the body's immune system response to a virus.
4. D- Each persons immune system employs different tactics to get rid of the virus.
5. D- yes, because mutated viruses are able to infect more hosts.
i just did this test, 100% with these answers
