L8 Muscles

Question 1

Functions of muscular system:

Answer 1

1. Body movement
2. Heart beat
3. Constriction of organs and vessels

Question 2

Muscle properties are? ( 4)

Answer 2

-Contractility
-Excitability and responsiveness
-Elasticity / recoil
-Stretchability

Question 3

Muscle proteins are?

Answer 3

Contractile proteins
Regulatory proteins
Attachment proteins

Question 4

Contractile proteins consist of _____ and ____.

Answer 4

Actin- thin myofilament
Myosin- thick filament

Question 5

Regulatory proteins consist of _____ and _____.

Answer 5

Tropomyosin
Troponin

Question 6

Attachments proteins consist of _____, ____,_____ and _____.

Answer 6

Titin
Nebulin
Alpha actinin
Dystrophin

Question 7

Tropomyosin is wound around the ____.
Troponin are bound to ____ and contain ___ ions binding sites.

Answer 7

actin
tropomyosin
calcium

Question 8

Actin are ____ filaments containing ____ for ____ to enable ______.

Answer 8

thin
binding sites
myosin
muscle contraction

Question 9

Tropomyosin are ____ strands the help ___ and ____ actin but ___ myosin binding sites.

Answer 9

protein
stiffen
stabilise
block

Question 10

Troponin is a protein that attaches to ____ and binds to _____.

Answer 10

tropomyosin
calcium

Question 11

2 types of muscle contractions are ____ and _____.

Answer 11

Isometric ( equal distance )
Isotonic ( equal tension)

Question 12

Isotonic contraction results in ____ movement. When the muscle contracts, it causes _____ movement. When the muscle relaxes, it causes ____ movement. Tension is _____.

Answer 12

limb
concentric
eccentric
constant

Question 13

Isometric contraction are with ____ movement. The muscle length _______. Tension is _______.
Eg: ______

Answer 13

no limb
stays the same
increased
gymnastic handstand