Week 1 -3 - Knowledge Reflection Quizzes

Question 1

Within a neuron, the transmission of information is usually ______

Answer 1

Electrical

Question 2

Between neurons, the transmission of information is usually _____

Answer 2

Chemical

Question 3

The term ______ refers to the all-or-nothing response that is central to neurosignalling

Answer 3

Action Potential

Question 4

The two main classes of cell in the nervous system are _______

Answer 4

Neurons and Glial Cells

Question 5

If you inserted a micropipette into a neuron and pumped in a small quantity of calcium ions, each of which carried two positive charges, how would this affect the membrane potential?

Answer 5

The membrane potential would become depolarized relative to the resting potential

Question 6

The most important function of myelin in the nervous system is to ________

Answer 6

Facilitate conduction of action potentials in axons

Question 7

The __________, which is comprised of astrocytes, protects the brain from chemical compounds circulating in the body that might otherwise interfere with neuronal activity

Answer 7

Blood-brain barrier

Question 8

In myelinated axons, action potentials are generated at the _________ only

Answer 8

Nodes of Ranvier

Question 9

The poison tetrathylammonium (TEA) interferes with normal neural communication. The toxin binds to and blocks voltage-gated potassium channels in the neuron cell membrane. What best describes the effects of TEA on the action potential?

Answer 9

The repolarisation phase of the action potential is blocked

Question 10

The synapse refers to the junction between?

Answer 10

Two adjacent neurons

Question 11

The value of the membrane potential to which an axon must be depolarised to initiate an action potential is called ________ potential for that neuron.

Answer 11

Threshold