Practical

Question 1

What is meant by the all or none response of an axon?

Answer 1

When a nerve reaches threshold, it will always produce a maximal response and produce an electrical impulse single amplitude

Question 2

Absolute refractory period of a neuron

Answer 2

Period of time after an action potential during which the neuron cannot fire another impulse

Question 3

Relative refractory period of a neuron

Answer 3

Neuron can fire, but requires greater stimulus in order to do so

Question 4

What is FEV1

Answer 4

Forced Expiratory Volume in 1 second

Question 5

What ratio is used in spirometry tests?

Answer 5

FEV1/FVC

Question 6

Obstructive lung disease

Answer 6

Obstruction in the air passages with slower, shallower exhalation

Question 7

Restrictive lung disease

Answer 7

Make it difficult to fill the lungs during inspiration. Decrease in total lung volume

Question 8

Describe why a greater muscle contraction is produced when not enough time is given between electrical impulses

Answer 8

Cytosolic calcium level is not given enough time to return to normal levels, so contraction is greater the second time around