PhysioLec: Synapse

Question 1

TRUE OR FALSE: Direct inhibition of synapses is due to opening of Cl- channels.

Answer 1

True

Question 2

TRUE OR FALSE: Opening K+ channels can produce inhibitory potentials post-synaptically

Answer 2

True

Question 3

TRUE OR FALSE: If there are multiple synapses, the delay in transmission increases

Answer 3

True

Question 4

TRUE OR FALSE: Synaptic transmissions can occur in dendro-dendritic connections

Answer 4

False

This is because dendrites do not contain synaptic vesicles at the terminal button, so there is no transmission of impulse.

Question 5

TRUE OR FALSE: Transient depolarization in the postsynaptic cell is called an end-plate potential.

Answer 5

True

Question 6

TRUE OR FALSE: Synaptic vesicles can only be found in the post-synaptic cell.

Answer 6

False

Question 7

TRUE OR FALSE: ACh undergoes the small synaptic vesicle cycle.

Answer 7

True

Question 8

TRUE OR FALSE: Ca++ is the key for terminal button depolarization.

Answer 8

False

It is the key for synaptic vesicle diffusion and exocytosis.

Question 9

TRUE OR FALSE: The dendrites serve to decrease area for reception.

Answer 9

False

Question 10

TRUE OR FALSE: ATP is needed for priming to occur in the small vesicle cycle.

Answer 10

True

Question 11

TRUE OR FALSE: Closing of K+ channels produces postsynaptic facilitation.

Answer 11

True

Question 12

TRUE OR FALSE: Chemical synapses have the ability to modify its transmission.

Answer 12

True

Question 13

TRUE OR FALSE: Majority of synapses in our bodies are electrical synapses.

Answer 13

False

Question 14

TRUE OR FALSE: Chemical synapses can transmit impulses both ortho & antidromically.

Answer 14

False

Question 15

TRUE OR FALSE: The Renshaw cell is an inhibitory interneuron found in the stretch reflex

Answer 15

False

Found in the gray matter of the spinal cord

Question 16

TRUE OR FALSE: The most common connection of synapses is axo-dendritic.

Answer 16

True

Question 17

TRUE OR FALSE: It is the Ca++ - Na+ antiport that pumps out Ca++ from the presynaptic cell to stop neurotransmission.

Answer 17

True

Question 18

TRUE OR FALSE: If a presynaptic cell is stimulated thrice at one site & produces an action potential in the post-synaptic cell, this is called spatial summation.

Answer 18

False

Question 19

TRUE OR FALSE: GABA undergoes the small synaptic vesicle cycle.

Answer 19

True