Lecture 4: Communication between Neurons

Question 1

Type of synapse; pre-synaptic neuron synapses on a post synaptic neurons dendrite

Answer 1

Axodendritic

Question 2

Type of synapse; pre-synaptic neuron synapses on a post-synaptic neuron’s cell body

Answer 2

Axosomatic

Question 3

Type of synapse; pre-synaptic neuron synapses on a post synaptic neuron’s axon terminal

Answer 3

Axoaxonic

Question 4

An ion channel whose opening is controlled by a chemical

Answer 4

Ionic Receptor

Question 5

A receptor activated by neurotransmitters and hormones made by the body

Answer 5

Endogenous Ligands

Question 6

A receptor can also be activated by drugs and toxins made outside of the body

Answer 6

Exogenous Ligands

Question 7

Receptor linked to the ion channel through biochemical reactions

Answer 7

Metabotropic Receptors

Question 8

Synaptic transmission takes about a (blank) and the delay is largely due to the time taken for (blank) to enter the terminal

Answer 8

milisecond, Ca++

Question 9

The number of Ca++ channels that open (blank) with the arrival of more action potentials

Answer 9

Increases

Question 10

The number of (blank) is related to the concentration of Ca++ in the axon terminal

Answer 10

Vesicles

Question 11

Each vesicle contains the same number of molecules of (blank)

Answer 11

Neurotransmitter

Question 12

Molecules that attach and initiates a physiological response when combined with a receptor

Answer 12

Agonist

Question 13

Molecules that interferes with or inhibits the physiological action of another

Answer 13

Antagonist

Question 14

An increase in receptor number distribution in the brain

Answer 14

Up-Regulation

Question 15

A decrease in receptor number distribution in the brain

Answer 15

Down-Regulation

Question 16

Two main mechanisms for termination of the post synaptic potential

Answer 16

Enzyme degradation, Active reuptake