Nerve and Synapses - Membrane potential

Question 1

inward / negative current

Answer 1

positive goes in, negative goes out (- leaves)

Question 2

outward/positive current

Answer 2

negative goes in, positive goes out (+ leaves)

Question 3

chemical driving force

Answer 3

more/ less ions on the sides or outside

Question 4

electrical driving force

Answer 4

negative/positive charge difference on inside and outside

Question 5

Ion channel features (membrane proteins)

Answer 5

• selective or non-selective
• gated or non-gated
• lon flow (ionic current) across membrane (down by electrochemical gradient/force)

Question 6

Four types of channel gating

Answer 6

1. ligand gated
2. By PTM
3. Voltage gated
4. Mechano-gated
5. Non-gated

Question 7

ligand gating

Answer 7

chemicals, pH, light, ect

Question 8

PTM gating

Answer 8

phosphorylation, hydroxylation, ect

Question 9

volatge-gateing

Answer 9

depolarization, hyperpolarization

Question 10

mechano-gating

Answer 10

stretch, pressure, flow, ect

Question 11

non-gated

Answer 11

spontaneous opening and closing