Neuroscience Chapter 6

Question 1

what is Myasthenia Gravis

Answer 1

chronic autoimmune neuromuscular disease that causes weakness in the skeletal muscles

Question 2

In Myasthenia Gravis, what neurotransmitter is not being transmitted?

Answer 2

Acetylcholine

Question 3

In depression, what neurotransmitter is not being transmitted?

Answer 3

Seratonin

Question 4

how do neurotransmitters travel?

Answer 4

From high to low concentrations

Question 5

What are the steps of an event at a synapse

Answer 5

AP has reached presynaptic terminal

Calcium enters presynaptic terminal from open channels within the axon itself

Ca encourages vesicles full of neurotransmitters to move to the end of the axon

Vesicle pops and neurotransmitter is released into synaptic cleft

Neurotransmitter binds to postsynaptic membrane receptor

Membrane channel changes shape and ions from the ECF enter postsynaptic cleft

Question 6

what are the two ways the neurotransmitter left in the cleft is cleared?

Answer 6

re-uptake transporters

enzymes that disassemble or eat up excess neurotransmitter

Question 7

what are the three types of synapses?

Answer 7

Axosomatic

Axodendritic

Axoaxonic

Question 8

Which two synapses either increase or decrease odds of an AP being generated?

Answer 8

Axosomatic and Axodendritic

Question 9

Describe an axosomatic synapse

Answer 9

Axon to body of next neuron

Question 10

Describe an axodendritic synapse

Answer 10

axon to dendrite of next neuron

Question 11

describe an axoaxonic synapse

Answer 11

Axon to axon of the next neuron

Question 12

Which synapse(s) can directly influence a release of neurotransmitter

Answer 12

Axoaxonic