Quiz

Test you understanding of key chapter concepts by working through the quiz below. To check your answer click on the orange arrow to the right. 

     1. What part of a neurone is sometimes myelinated?

  1. dendrite
  2. axon
  3. soma
  4. axon hillock  

The correct answer is: a. axon

     2. Neurones are specialised to receive, conduct and transmit:

  1. electrochemical signals
  2. action potentials
  3. electrical signals
  4. chemical signals 

The correct answer is: a. electrochemical signals 

     3. Most of a neurone’s DNA is contained within its:

  1. cytoplasm
  2. axon
  3. nucleus
  4. endoplasmic reticulum 

The correct answer is: c. nucleus

      4. Peripheral nervous system is to the central nervous system as Schwann cells are to:

  1. astroglia
  2. oligodendrocytes
  3. Schwann cells
  4. satellite cells 

The correct answer is: b. oligodendrocytes 

     5. A membrane potential is the difference in electrical charge between:

  1. potassium and sodium ions
  2. the inside and outside of the cell
  3. phosphoric acid and glycolipid layers
  4. resting and action potentials 

The correct answer is: b. the inside and outside of the cell 

     6. A neurone fires when:

  1. there is an EPSP
  2. hyperpolarisation occurs at the axon hillock
  3. neurotransmitters dock onto receptor proteins
  4. depolarisation at the axon hillock exceeds the threshold for excitation

The correct answer is: d. depolarisation at the axon hillock exceeds the threshold for excitation

     7. The end of the rising phase of an action potential occurs when the:

  1. potassium channels close
  2. sodium channels close
  3. potassium channels open
  4. chloride channels open 

The correct answer is: b. sodium channels close 

     8. Neurotransmitters are often stored in:

  1. synaptic buttons
  2. microtubules
  3. vesicles
  4. endoplasmic reticulum 

The correct answer is: c. vesicles 

     9. To protect neurotransmitters from degradation by enzymes in the neural cytoplasm, neurotransmitters are often stored in:

  1. synaptic buttons
  2. microtubules
  3. vesicles
  4. endoplasmic reticulum 

The correct answer is: c. vesicles 

     10. Interactions between neurones commonly occur across junctions called:

  1. synapses
  2. juxtapositions
  3. presynaptic membranes
  4. postsynaptic membranes

The correct answer is: a. synapses