Biology Unit 2 - Chapter 17.1-17.2

The nervous system is responsible for:

• controlling and coordinating body activities

• digesting food

• circulating blood

• producing hormones

The nervous system in most animals, including humans, is divided into two anatomical divisions. Name them.

• The two anatomical divisions of the nervous system are the central nervous system (CNS) and the peripheral nervous system (PNS).

• The two anatomical divisions of the nervous system are the central nervous system (CNS) and the autonomic nervous system (ANS).

• The two anatomical divisions of the nervous system are the peripheral nervous system (PNS) and the autonomic nervous system (ANS).

• The two anatomical divisions of the nervous system are the central nervous system (CNS) and the enteric nervous system (ENS).

Name the three classes of neurons.

• The three classes of neurons are sensory neurons, motor neurons, and interneurons.

• The three classes of neurons are sensory neurons, motor neurons, and glial cells.

• The three classes of neurons are sensory neurons, motor neurons, and astrocytes.

• The three classes of neurons are sensory neurons, motor neurons, and oligodendrocytes.

The four parts of a neuron are:

• Dendrites, Axon, Cell Body, Synapse

• Nucleus, Ribosome, Mitochondria, Golgi Apparatus

• Heart, Brain, Lungs, Liver

• Protons, Neutrons, Electrons, Nucleus

What is the function of an axon?

• To receive signals from other neurons.

• To conduct nerve impulses away from the cell body.

• To release neurotransmitters.

Fill in the blank: The ends of axons that release neurotransmitters to communicate with other cells are called _________.

• Axon-Synaptic Terminals

• Dendrites

• Cell Bodies

• Myelin Sheaths

The role of myelin sheath in the peripheral nervous system is to:

• protect nerve fibers

• increase the speed of nerve impulse conduction

• provide nutrients to neurons

• connect neurons to blood vessels

In the central nervous system, myelin is formed by _________.

• oligodendrocytes

• astrocytes

• microglia

• Schwann cells

The two types of nervous tissue in the CNS are:

• Neurons and Glial cells

• Axons and Dendrites

• White matter and Grey matter

• Sensory and Motor neurons

Which type of nervous tissue contains cell bodies and short, nonmyelinated fibers?

• Gray matter

• White matter