Unit 8 Nervous System And Senses

Question 1

2 divisions of the nervous system

Answer 1

Central nervous system (CNS)

Peripheral nervous system (PNS)

Question 2

What do neurons do

Answer 2

Generate and transmit nerve signals

Question 3

Neurotransmitters

Answer 3

Chemical made at the end of axons responsible for transmission across a synapse

Question 4

3 types of neurons

Answer 4

Sensory
Interneuron
Motor neuron

Question 5

Refractory period

Answer 5

During action potential the time during which a second stimulus wont cause action potential

Question 6

Synaptic cleft

Answer 6

Small gap between knob on one neuron and the dendrite on another

Question 7

What are the 3 meninges

Answer 7

Dura mater
Arachnoid mater
Pia mater

Question 8

Thalamus

Answer 8

Mass of gray matter located at the base of the cerebelum in the wall of the third ventricle

Question 9

Hippocampus

Answer 9

Part of limbic system; involved in forming, storing and processing memory

Question 10

Medulla oblongata

Answer 10

Lowest portion of the brain; concerned with control of the internal organs

Question 11

Reflexes

Answer 11

Automatic involuntary response of an organism to stimulus

Question 12

Action potential

Answer 12

Change in potential propagated along the membrane of a neuron; the nerve impulse

Question 13

Resting potential

Answer 13

Potential energy of a resting neuron, created by separating unlike charges across the neuron cell membrane

Question 14

Stimulus

Answer 14

In nerve physiology energy needed to cause a neuron to respond

Question 15

Broca’s area

Answer 15

Brain center associated with the motor control and speech and usuallylocated in the left frontal gyrus

Question 16

Electroencephalogram

Answer 16

Graphic recording of the brains electrical activity

Question 17

Primary somatosensory

Answer 17

Area posterior to the central sulcus where sensory information arrives from the skin and skeletal muscles

Question 18

Hypothalamus

Answer 18

region of the brain; the floor of the third ventricle that helps maintain homeostasis

Question 19

wernicke’s area

Answer 19

area located in the posterior part of the temporal lobe; plays an important role in the comprehension of language

Question 20

somatic sensory sytem

Answer 20

portion of the peripheral nervous system containing motor neurons that control skeletal muscle