Lesson 5

Question 0

Define the Brain.

Answer 0

the body’s central command organ

the nervous system’s command organ

Question 1

Define Nervous System.

Answer 1

Organ system that is made of the structures that control the reactions and actions of the body.

Question 2

Define the Neuron

Answer 2

A nerve cell that is specialized to receive and conduct electrical impulses.

Question 3

Define the dendrite.

Answer 3

branchlike extension of a neuron that receives impulses from neighboring neurons

Question 4

Define the axon.

Answer 4

An elongated extension of a neuron that carries impulses away from the cell

Question 5

Define the Endocrine System.

Answer 5

a collection of glands and groups of cells that secrete hormones that regulate growth, development, and homeostasis; include the pituitary, thyroid, parathyroid, and the adrenal glands, the hypothalamus, the pineal body and the gonads

Question 6

Define a hormone.

Answer 6

A substances that is made in one cells or tissue and that causes a change in another cell or tissue in a different part of the body.

Question 7

Define a gland.

Answer 7

A group of cells that make chemicals for use elsewhere in the body.