Target: 10 questions in 10 mins

Q1-3. The image shows a neuron:

  

1. Which row correctly identifies structures K, L and M?

  K L M
A. Cell body Axon Dendrite
B. Node of Ranvier Synapse Cell Body
C. Cell body Dendrite Axon
D. Dendrite Synapse  Axon
2. What type of neuron is shown in the image above?
  • A. Relay
  • B. Sensory
  • C. Motor
  • D. Non-myelinated
3. An action potential will travel ...
  • A. bidirectionally
  • B. from K to L
  • C. from M to K
  • D. from L to K

Q4&5. The image shows a cell membrane at resting potential:

 OpenStax (edited)
CC BY-SA 4.0
4. The recording microelectrode located inside the axon should read:
  • A. -55mV
  • B. + 30mV
  • C. +70mV
  • D. -70mV
5. To establish the resting potential shown in the image, which is the correct description?
  • A. Sodium ions are actively transported out and potassium ions are actively transported into the neuron
  • B. Sodium ions diffuse out while potassium ions diffuse into the neuron
  • C. Both sodium and potassium ions are pumped out of the neuron
  • D. Three potassium ions are pumped out for every two sodium ions pumped into the neuron

6. The image shows a graph of conduction velocity of myelinated and unmyelinated neurons in cats (felines). The dotted lines are theoretical fits for the experimental data collected.

 

 WillowW
CC BY-SA 3.0

What can be concluded from the experimental data collected?

I. There is a linear relationship between axon diameter and conduction velocity in myelinated feline neurons
II. There is a positive correlation between axon diameter and conduction velocity
III. The same pattern should be present in all mammals
IV. Myelination of neurons in felines increases conduction velocity
  • A. I and IV only
  • B.  II and III only
  • C.  II and IV only
  • D. I, II, III and IV

Q7-10. The image below shows an acetylcholine synapse:

 Dake (edited)
CC BY-SA 3.0
7. Which process labelled A to D requires energy?

8. Which letter represents the uptake of calcium ions?
9. Which letter shows acetylcholine binding to its receptor?
10. Which letter shows simple diffusion?