Answer:
The neurons interact with each other at synapse through action potential generated in response to the stimulus. At the resting phase, all the ion channels remain closed and the cell maintains a high amount of Na⁺ ions outside the cell and a high amount of K⁺ ions inside the cell. This difference maintains the membrane potential at -70mv.
When a stimulus activates a cell receptor, it causes the opening of the sodium channels in response to either mechanical stimulus or neurotransmitter released due to stimulus. The opening of the sodium channels leads to the influx of Na⁺ ions which changes the potential from -70 mv to more positive value. When this change in membrane potential reaches - 55 mv it leads to the opening of the voltage-gated channels which causes an influx of Na⁺ ions. This more influx of Na⁺ ions leads to depolarization when the membrane reaches above the threshold and the action potential is generated in the neuron.
Answer: the answer is either D or B
Explanation:
<u>Answer</u>
neural tube defects
Folic acid before conception and during pregnancy helps prevent n<u>eural tube defects</u><u>.</u>
The differences between the two groups of the same species may be influenced by their genetic differences (such as allelic frequencies) and their environment
Individuals of the same species may differ in the following characteristics;
- Fertility – on the population may a higher frequency of recessive alleles that reduces their rate of reproduction
- Metabolism – this also may be determined by the type of allele
- Physical appearance – the influence of the environment in which the population habits on the genotypes of the population
- Behavior – this is mostly determined by the environment.
- Learning - this is also determined by the environment
1) True
2) False
3) False
4) True
5) True
6) True
7) True
8) True
