Lab 8 Brain, Nervous System

Question 1

CNS

Answer 1

Brain and spinal cord

Question 2

PNS

Answer 2

All nervous tissue outside of CNS

Question 3

Afferent

Answer 3

Towards CNS, sensory input

Question 4

Efferent

Answer 4

Away from CNS, motor output

Question 5

Somatic nervous system

Answer 5

Voluntary
Effector= skeletal muscle

Question 6

Autonomic nervous system

Answer 6

Involuntary
Effector=smooth muscle, cardiac muscle, glands

Question 7

Dura mater=?

Answer 7

=tough mother

Question 8

What are the 2 layers in the cranium

Answer 8

1- endosteal layer (lines in skull)
2- Meningeal layer (covers brain) *most durable

Question 9

Arachnoid mater

Answer 9

Middle membrane, spider web like structure
sub arachnoid space filled with CSF

Question 10

Pia mater

Answer 10

Innermost membrane, most delicate, blood-brain barrier

Question 11

CSF

Answer 11

Cerebrospinal fluid
Bathes brain
Flows around brain through ventricles
Acts as watery cushion to protect brain
Removes metabolic waste and regulates chemical environment

Question 12

Gray matter

Answer 12

Unmyelinated

Question 13

White matter

Answer 13

Myelinated