PSE 1 review part 12 (knicker slides)

how many bones do we have?

• 206

• 143

• 167

• 208

The practice of physical conditioning and reconditioning of athletes and the prevention of injuries incurring them

• athletic training

• injury prevention practice

• athletic coaching

• periodisation

what does not belong to mechanical load

• forces

• pressure

• torque

• compression

which belongs to mechanical stress and strain

• compression

• tension

• binding stress

• shear forces

• all of these answers

% of body mass the muscles make up

• 30-40%

• 12-20%

• 35-43%

• 18-24%

Answer explanation

12-20% is the percent of weight bones make up: and together (musculoskeletal system) makes up 42-60% of your total weight

how many muscles in the human body?

• 656

• 206

• 418

• 566

Select the incorrect pair

• bipennate: Deltoid

• fusiform: biceps femoris

• convergent: pectoralis major

• parallel: rectus abdominus

Answer explanation

multipennate: deltoid

Bipennate: rectus femoris

unipennate: palmar interosseus

circular: orbicularis oculi

pennate muscles have a higher force capacity than parallel muscles

• true

• false

Answer explanation

parallel muscles have a higher speed capacity

A ________ consists of a motor neuron and its muscle fibers

how many muscle fibers does a big motor unit innervate (neuron:fiber)

• 1:3

• 1:2000

• 1:3000

• 1:200

Answer explanation

small motor units have a neuron to fiber ratio of 1:3 mostly type 1 fibers. type 2 fibers are 1:2000