Nervous System

Question 1

I look like branches and receive messages from other cells, what am i?

Answer 1

Dendrites

Question 2

The messages travel down me, what am I?

Answer 2

Axons

Question 3

I am a lipid substance that is wrapped around an axon , what am i?

Answer 3

Myelin

Question 4

I am gaps in the myelin sheath of myelinated axons which are important in action potential propogation, what am i?

Answer 4

Nodes of Ranvier

Question 5

I form junctions with other cells to keep transmitting the message, what am I?

Answer 5

Axon terminal

Question 6

What type of cells are support cells of the nervous system and do not send electrical signals?

Answer 6

Glial cells

Question 7

What is found in the CNS and is involved in defense, by scavenging pathogens or debris then phagocytose the pathogen to destroy it?

Answer 7

Microglia

Question 8

What is located in the CNS and provide structural support and maintain the blood-brain barrier?

Answer 8

Astrocyte

Question 9

What cells regulate the concentration of ions, nutrients, and dissolve gases, and absorb and recycle neurotransmitters?

Answer 9

Astrocyte

Question 10

What cells are found lining ventricles in the brain and central canal of the spinal cord and produces cerebrospinal fluid?

Answer 10

Ependymal cells

Question 11

What is located in the CNS and wraps myelin around axons in the CNS?

Answer 11

Oligodendrocytes

Question 12

What is located in the PNS produces myelin around axons in the PNS?

Answer 12

Shwann cells

Question 13

The action potential is propagated at the Nodes of Ranvier and is know as saltatory propogation, allowing the action potential to jump down the axons that are very long. Are these sigals fast or slow?

Answer 13

Fast

Question 14

The action potential moves along the entire length of the axon and is known as continuous propagation found in short axons. Are these signals fast or slow?

Answer 14

Slow

Question 15

This is the area where two neurons can pass chemical signals from one cell to the other?

Answer 15

Synapse

Question 16

What is the name of the small space between the two neurons?

Answer 16

The synaptic cleft

Question 17

What is the name of the neuron where the signal is initiated?

Answer 17

Presynaptic neuron

Question 18

What is the name of the neuron that receives the signal?

Answer 18

Postsynaptic neuron

Question 19

What is it called when the neurotransmitters diffuse, or drift away, from the synaptic cleft?

Answer 19

Diffusion

Question 20

What is it called when the neurotransmitter is taken back into the presynaptic neuron and can then be recycle and reused?

Answer 20

Reuptake

Question 21

What is it called when Enzymes can break down the neurotransmitter, sending the component parts back into the presynaptic neuron to be reused?

Answer 21

Enzymatic clearance