NEURO & SENSORY systems pp

Question 1

Humans have the central nervous system (CNS) which is composed of what 2 parts?

Answer 1

brain and spinal cord

Question 2

Humans have the peripheral nervous system (PNS) contains?

Answer 2

All nerves and ganglia that lie outside the CNS

Question 3

The peripheral nervous system (PNS) is divided into what two systems?

Answer 3

Somatic nervous system and Autonomic nervous system

Question 4

Somatic nervous system

Answer 4

Sensory and motor functions that control skeletal muscle

Question 5

Autonomic nervous system

Answer 5

Controls smooth muscle, cardiac, muscle, and glands

Question 6

Neurons are?

Answer 6

nerve cells

Question 7

Cell body contains?

Answer 7

nucleus and organelles

Question 8

Dendrites receive signals from?

Answer 8

sensory receptors or other neurons

Question 9

Axon conducts?

Answer 9

nerve impulses to another neuron or to other cells

Question 10

Axons are covered by?

Answer 10

myelin sheath

Question 11

Any long axon is also called a

Answer 11

nerve fiber

Question 12

3 types of neurons?

Answer 12

Motor (efferent) neurons
Sensory (afferent) neurons
Interneurons

Question 13

Motor (efferent) neurons do what?

Answer 13

Accept nerve impulses from the CNS

Transmit them to muscles or glands

Question 14

Sensory (afferent) neurons

Answer 14

Accept impulses from sensory receptors

Transmit them to the CNS

Question 15

Interneurons

Answer 15

Convey nerve impulses between various parts of the CNS

Question 16

Spinal cord and brain are wrapped in three protective membranes called?

Answer 16

meninges

Question 17

Spaces between meninges are filled with?

Answer 17

cerebrospinal fluid

Question 18

cerebrospinal fluid is continuous with?

Answer 18

that of central canal of spinal cord and the ventricles of the brain

Question 19

The spinal cord is composed of?

Answer 19

gray matter and white matter

Question 20

what gives the gray matter its color?

Answer 20

Cell bodies and short unmyelinated fibers give the gray matter its color

Question 21

what gives white matter its color?

Answer 21

Myelinated long fibers of interneurons running in tracts give white matter its color