Neurons

Question 1

How many neurons are in the brain?

Answer 1

86 billion on average

Question 2

What are the 3 types of Neurons? (define each)

Answer 2

Sensory Neurons, Motor Neurons, Interneurons

Question 3

How does the perceived intensity vary by the all-or-nothing firing of neurons?

Answer 3

1) More neurons fired or 2) the frequency of neurons fired

Question 4

Draw or imagine a typical neuron

Answer 4

yea…

Question 5

Dendrite

Answer 5

Receives input signals from other neurons

Question 6

Nucleus

Answer 6

Collects information from dendrites to send to the axon

Question 7

Axon

Answer 7

Transmits neural impulses to the Axon Terminal

Question 8

When does the nueron fire?

Answer 8

When the cell reaches a certain threshold to fire an all-or-nothing action potential

Question 9

Myelin Sheath

Answer 9

A protective insulation layer allowing for quick transmission

Question 10

Axon Terminal

Answer 10

Where the nueron releases neurotransmitter and communicates with other neurons

Question 11

Synapse

Answer 11

The gap where neurons communicate with other neurons

Question 12

Psychopharmacological drugs have 2 categories (define each)

Answer 12

Antagonists and Agonists

Question 13

How is the brain unlike a computer/laptop? (2 things)

Answer 13

1) Resilient - damage to 1 part doesn’t make the entire brain collapse.
2) Fast - although brain tissues are slow, processing speed is very fast