Answer: Na+ channels are closed
Explanation:
The refractory period describes a period between the initiation of an action potential (where Na+ channels are active/open), and immediately after the action potential’s peak. In the absolute refractory period, action potentials cannot be generated, as Na+ channels are in an inactive or closed state, they usually take around one or two minutes.
After the absolute refractory period the relative refractory period (RRP) occurs. During the RRP, it is hard to send another action potential. Na+ channels are once again open, but the cell remains hyperpolarized- its membrane potential, remains negative. Recovery from inactivation is voltage and time-dependent; Action potentials would require an influx of more positively charged ions. These must be more than a specific threshold in order to have the cells send along more action potentials which helps with figuring out stimulus intensity.
You have to do the cross-back before making any conclusions.
The epithelial cells resist stretching and twisting in the
skin because if desmosomes that holds them together. The desmosomes are the one
responsible for the cell to cell adhesions, making them be tight or held
together as this is its structure.
Answer:
As comic is not available, lets try to understand genetic drift generally.
Explanation:
Genetic drift can be described as the changes in the allele frequency or changes in the genotype variations of a population due to certain reasons such as death etc. In genetic drift, a particular genotype of a species starts to decrease, while the other genotype might start to increase. For example, imagine there are 6 colours of rabbits to be seen in a population. An event such as a diseases takes over which results in death of most of the rabbits. Only a few rabbits are left having brown and grey colour. Hence, the genetic drift changes from 6 to only 2.
Answer: The answer would be "plant-like protists". These protists make their energy on sunlight. This would make them a protist and a plant-like cell.
i think this is the answer. if not plz feel free to tell me
