Muscles And Contraction

Question 1

3 types of contractions

Answer 1

Concentric, eccentric, isometric

Question 2

Concentric contraction

Answer 2

“Shortening” bicep curls lifting an object

Question 3

Eccentric contraction

Answer 3

“Lengthening” bicep curls lowering weight

Question 4

Isometric

Answer 4

“Static” Lift/move immovable object (wall)

Question 5

Static contraction

Answer 5

(Isometric) when muscle generates force w out changing length

Question 6

Dynamic contraction

Answer 6

Change in length during contraction

Question 7

3 energy systems

Answer 7

Phosphagen (ATP-PCr), Glycoltic, oxidative

Question 8

Phospagen system

Answer 8

Fast, but short lived (10-15s) short high intensity

Question 9

Glycolysis system

Answer 9

Gives energy for moderate duration (30-2min)

Question 10

Oxidative

Answer 10

Slow to start, gives sustained energy for long duration

Question 11

Activities for phosphagen

Answer 11

100m dash, powerlifting, shot put

Question 12

Glycolytic activities

Answer 12

400m-800 sprints, soccer, CrossFit

Question 13

Oxidative activities

Answer 13

Marathon running, swimming(endurance), cycling

Question 14

Reflex Arc component 5

Answer 14

Receptor, sensory(afferent), intermediate nerve fibre, motor(efferent), effector organ

Question 15

Most important fuel source in body 4 all types energy production

Answer 15

Adenosine triphosphate (ATP), stores & releases energy 4 various cellular processes

Question 16

Makes up central nervous system

Answer 16

Brain and spinal cord (control and process info)

Question 17

Peripheral nervous system

Answer 17

Nerves outside cns, responsible 2 transmit signals

Question 18

All-or-none principal

Answer 18

If motor unit recruited, will contact to fullest potential. All muscle fibres will contract/none will