Question

1)How so nerve impulses travel in the body?Explain
2)What is hydrotropism?
3)Write the structure and functions of the placenta in a Human female body?​

Answer 1

Answer:

Nerve impulses travel in the body through neuron. Each neuron is separated by a gap calle Synapse. Synapse allow the information to pass from one neuron to another. At the end of one axon, it sets off a chemical reaction that creates an electrical impulse that is send to the dendrites and then to the cell body of another neuron.

Hydrotropism is the growth of plant toward or away from water.

Placenta is a disc like structure embedded in human female. It is used to pass nutrients from mother to the embryo. Also waste produced by embryo is removed through placenta.