Need

which of the following sets of terms could be used in a description of the peripheral nervous system?

a) motor neurons and sensory neurons

b) brain and spinal cord

c) motor neurons and brain

d) sensory neurons and spinal cord

A) Motor neurons and sensory neurons

We can answer the question by answering the following questions

What is the nervous system?

How is the nervous system classified?

What comprises of the central nervous system?

What comprises of the peripheral nervous system?

explanation:

let the different atoms be x and y. each with four protons and same mass will be represented as follows.

mass number is number of protons + number of neutrons.

            and  

since, it is given that one has a negative charge while the other is neutral. therefore, there will be increase in number of protons and the atom will be represented as follows.

according to periodic table, mass number of beryllium is 9 and it has atomic number 4 so, the atoms will be and .  

the protons and neutrons will be located inside the nucleus whereas the electrons will be revolving around the nucleus.