Nervous System

Question 1

What are the main divisions of the nervous system?

Answer 1

Central nervous system: brain and spinal cord

Peripheral nervous system: all neurons outside CNS

Question 2

What are the types of neurons?

Answer 2

Multipolar

Bipolar

Psuedo

Question 3

Neuroglia characteristics

Answer 3

Supporting cells for neurons

More numerous then neurons

Can divide to produce more cells

5 types

Question 4

Sensory receptors

Answer 4

Pick up stimuli

In your skin

Question 5

Sensory neurons

Answer 5

Send stimulus to interneurons in spinal cord

Question 6

Interneurons neuron

Answer 6

Located in the CNS and connect to motor neurons

Process stimuli

Question 7

Efferent neurons

Answer 7

Send response to effector

Question 8

Effector

Answer 8

Muscle, gland, organ. Whatever is receiving signal from efferent neurons.

Question 9

What is the most important part of the brain and why?

Answer 9

The Brian stem because it contains the midbrain, Pons, and medulla oblongata

Question 10

What does the medulla oblongata do?

Answer 10

Regulates heart rate, blood vessel diameter, breathing, swallowing, vomiting, hiccuping, coughing, sneezing, and balance

Question 11

What does the Pons regulate?

Answer 11

Breathing, chewing, salivation, swallowing

Question 12

What is the diencephalon composed of?

Answer 12

Thalamus, hypothalamus

Question 13

What does the hypothalamus regulate?

Answer 13

Controls pituitary gland, homeostasis, body temp, thirst, hunger, fear, rage, and sexual emotions

Question 14

What does the cerebrum control?

Answer 14

Thinking, processing, personality, communication, remembering, understanding, and initiates involuntary movements

Question 15

What are sulci?

What are gyri?

Answer 15

Sulci- the indentations or “channels” on the surface of the brain

Gyri- the tops of the “channels”

Question 16

What does the frontal lobe control?

Answer 16

Controls voluntary motor functions, aggression, moods, and smell

Question 17

What does the parietal lobe do?

Answer 17

Evaluates sensory input such as touch, pain, pressure, temp, and taste

Question 18

What does the occipital lobe control?

Answer 18

Vision

Question 19

What does the temporal lobe control?

Answer 19

Hearing, smell, memory

Question 20

What Cerebellum

Answer 20

C

Question 21

Resting Neurons

Answer 21

• the plasma membrane at rest is polarized

- fewer positive ions are inside the cell than outside the cell

Question 22

Resting membrane potential

Answer 22

The inside of the membrane is slightly more negative than the outside

Question 23

How do voltage gates sodium channels work?

Answer 23

The gate open when there’s a change in voltage which causes NA+ to come in