Exam 2: Musculoskeletal System Lab Part 2 Flashcards
Tendons attach __ to bone
Ligaments attach __ to bone
Tendons attach muscle to bone
Ligaments attach bone to bone
Socket of the hip joint
acetabulum
Ball of hip joint
head of femur
For the elbow:
the __ is the projection
the __ is the depression
Olecranon process
Olecranon depression
Name the muscle associated with the action:
move your arms toward your midline (adduction)
latissimus dorsi
Name the muscle associated with the action:
Bicep curl (flexion)
biceps brachii
Name the muscle associated with the action:
move your fist from your shoulder down to your side
triceps brachii
Name the muscle associated with the action:
extend your fingers in a stop position
extensor digitorum
Name the muscle associated with the action: (there are 3 for this one)
kick your own butt
biceps femoris
semitendinosus
semimembranosus
Name the muscles associated with the action: (there are 4 for this one)
kick a ball
vastus medialis
vastus intermedius
vastus lateralis
rectus femoris
Name the muscle associated with the action:
point your toes up (dorsiflexion)
tibialis anterior
Name the muscle associated with the action:
point your toes down (plantar flexion)
gastrocnemius
Name the muscle associated with the action:
winking
orbicularis oculi
Name the muscle associated with the action:
smiling
zygomaticus muscle group
Name the muscle associated with the action:
whistling
orbicularis oris
Name the muscle associated with the action:
eating
masseter
Name the muscle associated with the action:
lifting something
pectoralis major
Name the muscle associated with the action:
sit-ups
rectus abdominus
Name the muscle associated with the action:
moving your arms laterally away from your midline (t-posing) (abduction)
deltoid
a sarcomere contracts as the __ heads bind __ and pull __ to the middle of the sarcomere (M-line)
myosin
actin
actin
__ ions enter the synaptic end bulb of the axon.
calcium
Action potentials (resulting from Na+ entering the axon) travel down the __________ of a neuron.
axon
Via__________ , acetylcholine is released from the synaptic end bulb into the synaptic cleft.
exocytosis
__________ diffuses across the synaptic cleft and binds receptors on the __________ (the squiggly part of the sarcolemma – the plasma membrane of the muscle cell), which allows __________ channels to open
acetylcholine molecules
motor end plate
sodium
e) Action potentials travel along the __________ and T-tubules.
sarcolemma
f) The terminal cisternae and __________ (smooth endoplasmic reticulum) release __________ ions into the sarcoplasm.
sarcoplasmic reticulum
calcium
g) Calcium binds troponin, and troponin moves __________ off the myosin-binding sites on actin.
tropomyosin
h) Myosin binds (forms __________ with) actin and does a__________, which causes the __________ to shorten.
cross-bridge
power stroke
sacromere
i) What neuron is the synaptic end bulb a part of?
motor neuron
j) What cell is the motor end plate a part of?
muscle cell
k) What is the space between the two cells (your answers above) called?
synaptic cleft
l) The two cells and the space make up the _______________ junction.
neuromuscular
m) What transport process releases the neurotransmitter from the synaptic end bulb?
action potential
n) A motor neuron uses this neurotransmitter to communicate with a muscle cell.
acethylocholine
o) What is a muscle cell’s plasma membrane called?
sarcolemma
p) What is a muscle cell’s smooth ER called? What is its function?
endoplasmic reticulum
q) What protein does calcium bind?
storing and releasing calcium ions
r) What protein covers the myosin-binding sites on actin?
tropomyosin
s) What is a cross-bridge?
the binding of the myosin head to actin
t) Describe what happens during the power stroke.
pulling of actin toward the m-line
What causes myasthenia gravis?
Abnormal enlargement or tumor of thymus gland
What causes multiple sclerosis?
Body’s immune system mistakenly attacks myelin sheath of the nerve cells.
