neurons & resting membrane potential

Question 0

type of neuron that conducts signal away from CNS

Answer 0

efferent neurons

Question 1

type of neuron that conducts signal towards CNS

Answer 1

afferent neurons

Question 2

neurons entirely within CNS

Answer 2

interneurons

Question 3

a cell that is able to generate and propagate an electrical signal

Answer 3

neuron

Question 4

4 parts of a neuron

Answer 4

1. dendrite
2. soma (cell body)
3. axon
4. axon terminal (pre-synaptic terminals)

Question 5

part of neuron that receives info

Answer 5

dendrites

starts to send electrical signal to cell

Question 6

part of neuron that has all organelles and deals with protein synthesis

Answer 6

cell body (soma)

Question 7

part of neuron that propagates action potential

Answer 7

axon

Question 8

part of neuron that releases the neurotransmitter (NT)

Answer 8

axon terminal (pre-synaptic terminal)

Question 9

neurons generate signals that are ____ and _____.

Answer 9

fast, addressed (specific)

Question 10

cells in the nervous system that support neural function

Answer 10

glial cells

Question 11

3 types of glial cells

Answer 11

1. Schwann cells
2. astrocytes
3. microglial cells

Question 12

type of glial cell that wraps around axons and forms myelin sheath

Answer 12

Schwann cells (PNS)

Question 13

type of glial cell that regulates neuron and helps get & use nutrients

Answer 13

astrocytes (CNS)

Question 14

type of glial cell that deals with immune function & protects neuron from damage

Answer 14

microglial cell (CNS)

Question 15

difference in charge across the neuron (axon) membrane

Answer 15

resting membrane potential

Question 16

Membrane potential (MP):
inside cell–
higher ____ concentration
lower _____ concentration

Answer 16

higher K+

lower Na+ and Cl-

Question 17

what is the resting membrane potential

Answer 17

-65 mV

Question 18

Na+ MP

Answer 18

+58 mV

Na+ flows into cell

Question 19

K+ MP

Answer 19

-80 mV

K+ flows out of the cell

Question 20

when the MP is more positive than the RMP

Answer 20

depolarized

Question 21

when the MP is more negative than the RMP

Answer 21

hyperpolarized

Question 22

Na+ and K+ can leak through the membranes.
Na+ leaks ____
K+ leaks ____

Answer 22

Na+ leaks in slowly

K+ leaks out slowly

Question 23

is the membrane more permeable to Na+ or K+?

Answer 23

K+