Week 2- Neural Communication

Question 1

Axon Hillock

Answer 1

Base of cell body

Initiates chemical reaction down neutron if stimulated enough

Question 2

Sensory Neurons

Answer 2

receive info from body and brings it back to the brain

Question 3

Motor Neurons

Answer 3

sends messages from the brain/spinal cord to the muscles

Question 4

Resting Potential

Answer 4

neuron not transmitting info

High [K+][Na+] outside cell, low [K+]{Na+] inside, high [Cl-} inside

Question 5

Hyperpolarization

Answer 5

Na+ ions pumped back out of the cell when ion channels close, resulting in the inside of the neuron being less negative than the resting potential
-Less likely to fire

Question 6

Excitatory Neurotransmitters

Answer 6

Causes membrane potential to increase

increases probability of action potential occurring

Question 7

Inhibitory

Answer 7

Membrane potential decreases

Neutron less likely to fire

Question 8

Reuptake

Answer 8

neurotransmitters released into synapse are reabsorbed into the axon terminal of a presynaptic cell

Question 9

Agonist

Answer 9

mimics/enhances of neurotransmitters
Direct- binds to recepto
-Indirect- facilitates effect of neurotransmitter, but doesn’t bind (i.e. block reuptake)

Question 10

Antagonist

Answer 10

inhibits neurotransmitter by blocking receptor or preventing synthesis of neurotransmitter