Paper 1 - Neuromuscular and Newton

Question 1

Motor Unit

Answer 1

Consists of a motor neurone and all the muscle fibres it stimulates

Question 2

All of none law

Answer 2

States that if a motor unit receives sufficient stimulation an action potential will be released and all the fibres in that motor unit will contract.

Question 3

Spatial Summation

Answer 3

The addition of impulses recieved at the same time at different positions in the neurone, when added together an action potential will be released.

Question 4

Wave Summation

Answer 4

When repeated nerve impulses do not allow muscle fibres time to fully relax, resulting in a tetanic contraction

Question 5

Tetanic contraction

Answer 5

A smooth, sustained muscle contraction

Question 6

1st law of linear motion

Answer 6

Law of inertia - A body will remain in a state of rest or constant motion until a large enough external force acts upon it.

Question 7

2nd law of linear motion

Answer 7

Law of acceleration - Acceleration is directly proportional to the magnitude of the force produced (F = m x a)

Question 8

3rd law of linear motion

Answer 8

Law of action/reaction - For every action, there is an equal and opposite reaction.

Question 9

1st law of angular motion

Answer 9

A rotating body will continue with constant torque until a large enough external torque is acted upon it.

Question 10

2nd law of angular motion

Answer 10

The rate of change of angular motion is proportional to the force changing it.

Question 11

3rd law of angular motion

Answer 11

When torque is applied, there will be an equal and opposite force