The Neuron (lesson 5)

Question 1

What type of signal is a nerve impulse?

Answer 1

Electrical signal

Question 2

What does every neuron have?

Answer 2

Contains charged ions that make electrical potential

Question 3

What ions are important in nerve impulse transmission?

Answer 3

Sodium Na+ and potassium k+ and other negatively charged ions

Question 4

Where is the neg and pos charge in polarized?

Answer 4

Inside negatively charged, and outside is positively charged

Question 5

What type of pumps do neurons use and why?

Answer 5

sodium-pottssium pumps that use active transport to keep ions at the right levels

Question 6

What is repolarization?

Answer 6

Return of electrical charges to their original resting state

Question 7

What is depolarization?

Answer 7

When a nerve impulse hits a nueron the pumps allow sodium into the neuron which flips the charges and goes through the entire cell

(neg outside, pos inside)

Question 8

What was the axon terminals contain?

Answer 8

Tiny sacs or vesicles called synaptic vesicles

Question 9

In axon terminals sacs or vesicles filled with?

Answer 9

Chemicals called neurotransmitters

Question 10

What is a neurotransmitters used for?

Answer 10

Like a message that tells the next neuron to fire