Download Identify the following muscles

ANATOMY & PHYSIOLOGY
QUIZ 2: WINTER 2008
Name:____________KEY_______________
Muscle ID:
Station 1
Station 5
A
______________________Biceps brachii
A
___________________Gluteus maximus
B
_____________________Triceps brachii
B
__________________Tensor fascia latae
Station 2
Station 6
A
_________________________Trapezius
A
__________________________Sartorius
B
_________________Sternocleidomastoid
B
____________________Vastus medialis
Station 3
Station 7
A
_________________Flexor carpi ulnaris
A
_____________________Biceps femoris
B
_________________Extensor carpi radii
B
____________________Tibialis anterior
Station 4
Station 8
A
____________________Pectoralis major
A
___________________Orbicularis occuli
B
__________________Rectus abdominus
B
__________________________Masseter
Muscle Physiology (3)
What two protein filaments interact to produce
contraction of a sarcomere?
What organic molecule do all muscle cells
make to fuel their contractions?
What type of contraction will result in the
shortening of a muscle?
Myosin/thick & actin/thin
ATP
Isotonic, Concentric
Name three physiological adaptations ("rapid" or "slow") that my muscles might make in response to
aerobic or anaerobic training. (3)
Increase storage of ATP, or glucose or CP; increase mitochondrial density; increase capillary density;
increase # of protein fibers inside the myofibril; increase myoglobin storage; increase production of
glucose importing enzymes
Joint Station (3)
What joint is this?
Elbow
What type of synovial joint is this,
based on shape/movement?
Is it relatively strong or weak? Tell
me why?
Hinge
Strong; encased in broad ligaments; long bones interlock; only one
plane of movement/monaxial.
Bonus: Label phases of contraction on this trace of muscle tension produced by a twitch.
Tell we what is happening (mechanistically) in one of those phases. (4)
1 latent - AP arrives and is propagated down T-tubules causing release of Ca2+ ions from sarcoplasmic
reticulum
2 contraction - Ca2+ binds to troponin; the complex removes tropomyosin from the actin active sites,
allowing myosin heads to repeatedly bind and "walk" along actin filaments.
3 relaxation - Ca2+ diffuses away from myofilaments and is reabsorbed by the SR.