Module 3 Practice Quiz

What causes depolarisation ?

An external agent that is introduced into the body and binds to a cell receptor to prevent it from responding is a/an

Which hormone would bind to receptors in the cell or in the nuclei of a cell to affect DNA expression?

What does RMP stand for? 

The second phase (falling part) of a graph of an action potential is called......

What causes repolarisation ?

What does AP stand for?

Inhibitory postsynaptic potentials (IPSPs )

Which endocrine organs releases catecholamines upon SNS stimulation.

Tetrodotoxin blocks voltage-gated sodium channels. What effect does this substance have on the function of neurons?

The initial rising section of a graph of an action potential is called......

The most important ion in the formation of the resting membrane potential is .......

What fact about cells means that the RMP is much close to the E_k than the E_Na?

Which of the following is correct with regards to the internal charge of a cell

If Na⁺ was the only ion that played a role in the formation of the RMP and cells were permeable to Na⁺ the RMP would be?

An agent that is introduced to bind to cell receptors and elicit a response (i.e. to activate receptors) is a/an

A neuron has a RMP of -70mV, and it becomes hyperpolarised, the membrane potential is likely to be.....and.........

Where would we find voltage gated channels?

What is the name of the equation that can be used to determine the equilibrium potential for a particular ion?

Where would we find chemically gated channels?

Which of the following does NOT influence the time necessary for a nerve impulse to be conveyed by a particular neuron?

RMP stands for ........

What is plotted on the X axis of a plot/graph of an AP?

If K⁺ was the only ion that played a role in the formation of the RMP and cells were permeable to K⁺ the RMP would be...

The 2 most important ions in the formation of the RMP are.....

The term axonal transport refers to

What sort of channels give rise to graded potentials?

The multiple thin, branched structures on a neuron whose main function is to receive incoming signals are the

The value of the RMP is...........

Glucagon alone increases blood sugar to 100 mg/ml, adrenaline to 50 mg/ml, in combination to 180 mg/ml. Hormones are

A neuronal circuit where a large number of presynaptic neurons provide input to one postsynaptic neuron is called

If a stimulus to a nerve fails to reach threshold…..

The RMP most closely reflects the equilibrium potential of ………….., meaning that …………..?

What sort of channels give rise to action potentials?

When more action potentials arrive at the axon terminal, how are neurotransmitters affected?