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Cerrena [4.2K]
3 years ago
15

Which is the definition of an embryo?

Biology
2 answers:
riadik2000 [5.3K]3 years ago
5 0
<span>a.Prenatal stage of a human up to 8 weeks of development after fertilization.

Hope this helps!</span>
nalin [4]3 years ago
5 0

Answer:

The correct answer is option A.

Explanation:

The embryo can be defined as an organism is in the early stages of growth and differentiation, from 2nd week of fertilization up to the 8th week or end of the second month of pregnancy.

After the 8th week of the embryo development or 11th week from fertilization is termed as the fetus.

Thus, the correct answer would be option A.

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Neurotransmitters. With the regard to the process of the neural transmission, a refractory period refers to the time in interval in which. the Positively charged sodium ions are to pumped back to outside a neural membrane.

Neurotransmitters are the chemical messengers that your body can't function without it. Their job is to carry out chemical signals (“messages”) from one of the neuron (nerve cell) to the next target cell. The next target of the cell can be another nerve cell, a muscle cell or the gland.

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