Ch 7 Neurons

Question 0

What receives information from other neurons or from the environment and sends the information to the cell body

Answer 0

Dendrites

Question 1

What supports and protects the neurons

Answer 1

Glial cells

Question 2

What controls the cells metabolic activities

Answer 2

The cell body

Question 3

What integrates input from other neurons

Answer 3

Cell body

Question 4

What conducts the nerve impulses away from the cell body

Answer 4

Axon

Question 5

Release chemicals called neurotransmitters that affect the activity of nearby neurons such as muscle or gland

Answer 5

Axon endings

Question 6

Bundles of neuron fibers in the PNS

Answer 6

Nerves

Question 7

The inside is more negative compared to the outside
-70 mV
Membrane potential of a real cell that is not producing impulses

Answer 7

Resting potential

Question 8

Excitable, they can generate and transmit electrochemical signals that carry information

Answer 8

Neurons

Question 9

Major divisions of the nervous system

Answer 9

CNS and PNS

Question 10

Controls, integrates and coordinates the bodies activities

Answer 10

The nervous system

Question 11

Support and protect neurons

Answer 11

Glial cells

Question 12

Store neurotransmitters and release neurotransmitters in response to an incoming AP

Answer 12

Synaptic knobs

Question 13

Axon endings terminate in bulb like swelling called

Answer 13

Synaptic knobs

Question 14

Junction or a connection between a neuron and another cell

Answer 14

Synapse

Question 15

The nerve impulses jump from one node of a Ranvier to the next, in a

Answer 15

Saltatory conduction

Question 16

Unmyelinated axons segments that are found between the Schwan cells that make up the Myelin sheath

Answer 16

Nodes of Ranvier

Question 17

Carry information away from the CNS to an effector

Answer 17

Motor efferent neurons

Question 18

Carry information toward the CNS

Answer 18

Sensory afferent neurons

Question 19

Carry information within the CNS

Answer 19

Interneurons

Question 20

From the Myelin sheath, electrically insulate and protect the axon and speeds up the conduction of the nerve impulse

Answer 20

Schwan cells

Question 21

The brief time during which a new AP cannot be generated due to gated sodium channels being either open or inactivated until the resting potential is reestablished

Answer 21

Refractory period

Question 22

Either an AP happens all the way at the full intensity if threshold is reached or it doesn’t happen at all if threshold is it reached

Answer 22

All or nothing

Question 23

Voltage difference across the cell membrane for an unstimulated neuron. No signal is being sent out, neuron is charged and polarized

Inside of the cell is negatively charged with respect to the outside in resting conditions

Answer 23

Resting potential

Question 24

Voltage difference across a cell membrane due to a separation and unequal distribution of electrical charges -The difference in charge across the plasma membrane at any moment in time.

Answer 24

Membrane potential

Question 25

Generate and transmit or conduct moving electrochemical signals that can spread like a wave along the membrane over relatively long distances

Answer 25

Action potential

Question 26

Nerve impulses jump from one node of Ranvier to the next, is in the

Answer 26

Saltatory conduction