Ch. 2 Coursera

Question 1

he resting membrane potential depends on which of the following ions:

Answer 1

chloride
potassium
sodium

Question 2

A neuron’s membrane potential:

Answer 2

sits around a neg potential that is about -60 to -70 mV at rest

Question 3

Neurotransmitters:

Answer 3

are packaged in synaptic vesicles
must bind to receptors in order to have an effect
?

Question 4

Synaptic vesicles

Answer 4

fuse with the cell membrane when calcium ions flood the synaptic terminal
contain neurotransmitters

Question 5

hoose the order in which these events take place

Answer 5

• Action potential arrives in the pre-synaptic membrane.
• Calcium ions flood into the pre-synaptic terminal.
• The SNARE pin complex shifts its shape, pushing the vesicular membrane very close to the cell membrane.
• Neurotransmitter diffuses out of a synaptic vesicle into the synaptic cleft.
• Neurotransmitter diffuses across the synaptic cleft.
• Neurotransmitter binds to a receptor on the post-synaptic membrane.
• The membrane potential of the postsynaptic cell changes

Question 6

Check every event that is prevented by local Botox administration. Note that more than one of the following choices are correct:

Answer 6

the SNARE pin complex changes shape, leading the synaptic vesicle to fuse with the cell membrane

*NOT docked at pre synaptic membrane

Question 7

pinal cord strokes are rare but do happen. Which of the following symptoms could result from a stroke that damages the entire (both sides) thoracic spinal cord?

Answer 7

loss of voluntary movement in both legs

loss of parasympathetic output to the bladder and colon resulting in an inability to void urine or feces

Question 8

Panic attacks could involve which of the following?

Answer 8

changes in the activity of the enteric nervous system
a highly aroused emotional state of vigilance
high sympathetic tone

Question 9

Consider a person who has been spending all their time at home in a state of profound sadness over the death of a longtime pet. Concerned friends push this person to go skydiving. Which of the following are likely to occur as the mourning individual jumps out of a plane (with an instructor who pulls the rip cord)?

Answer 9

an enhancement of memory formation

a change of emotional tone