Module 3

Question 1

What do the muscle fibres connect to

Answer 1

fibres connect to tendon and endomysium

Question 2

distinguish between epimysium, perimysium, and endomysium

Answer 2

epimysium - outermost layer of muscle

perimysium - holds bundles of muscle fibres

endomysium - surround individual muscle fibres

Question 3

what are the functions of muscle

Answer 3

produce movement

maintain body temp

support and protect organs

Question 4

describe 3 main muscle fibre architecture types

Answer 4

fusiform - long musc

unipennate - fibres angled

multipennate - multiple angles

Question 5

describe physiological cross sectional area

Answer 5

physiological cross sectional area runs perpendicular to muscle fibres as opposed to “cross sectional area” which just runs perpendicular to muscle itself.

PCSA is directly proportional to maximum tension muscle can generate

Question 6

muscles that resist gravity tend to have what type of muscle fibre arrangement.

flexor muscles like biceps and hamstring tend to have what type or arrangement.

Answer 6

resist gravity = pennate (delts, quads)
- force prod
flexors = fusiform
- speed

Question 7

For the sake of biomechanics what do we call contractions of muscle rather than contractions.

Answer 7

Muscle actions (for iunknowing ppl, contraction could imply shortening when thats not the only type of contraction). Kinda silly

Question 8

what parts of muscle create active vs passive tension

Answer 8

active - actin/myosin

passive - titin