Quiz 1

Question 1

What is the unit of measurement of force?

Answer 1

Newtons

Question 2

The motor pathway flows from the

Answer 2

brain to the skeletal muscles

Question 3

An eccentric muscle action involves

Answer 3

application of force while the muscle is lengthening

Question 4

A motor unit is

Answer 4

a alpha motor neuron and muscle fibres it innervates

Question 5

The number of motor units in a small skeletal muscle of the human hand is likely to be closest to

Answer 5

100

Question 6

Compared with a tetanic contraction, a twitch contraction

Answer 6

requires a lower firing rate

Question 7

Skeletal muscle force can be changed by

Answer 7

varying the firing rate and recruitment of motor units

Question 8

The Size Principle (Henneman) predicts that

Answer 8

smaller motor units will be recruited before the larger motor units

Question 9

The type of motor units recruited during a high-intensity (80 %MVC) muscle contraction will usually be

Answer 9

all types of motor units

Question 10

At the onset of contraction, the rate at which force increases is

Answer 10

influenced by how quickly myocytes shorten