Muscle Tissue
muscle
A ____________ is a bundle of muscle fibers.
Fascicle
Sarcomeres extend from _________ to ___________.
Z-line to Z-line
The ______ of each motor neuron synapses with a single muscle fiber at the neuromuscular junction.
Axon
What is the rope-like connective tissue that connects the biceps to the scapula?
Tendon
Identify the two muscle tissue types that are striated.
Skeletal and cardiac muscle tissue
Identify the name of the connective tissue sheath that is most superficial and covers the surface of the muscle.
Epimysium
Which region of the sarcomere is composed of only actin and shortens during muscle contraction?
I band
What neurotransmitter is stored in the synaptic vesicles and released into the synaptic cleft when calcium enters the axon?
ACh (acetylcholine)
What are the two key muscles of the upper arm?
Biceps and triceps
Identify the function of smooth muscle.
To force substances through small channels.
Identify the more movable muscle attachment.
insertion
What is the name of the rope-like protein that blocks the myosin binding sites on actin?
Tropomyosin
What structure delivers the action potential to the sarcoplasmic reticulum to stimulate the release of calcium?
T-tubules
What muscle extends when the biceps contract to lift an object like a textbook off the table?
Triceps
What property of muscle tissue makes it like a rubber band?
Elasticity
Aponeurosis
What ion binds to troponin to change its orientation?
Calcium
Acetylcholine binds to the receptors and allows Na to move into the skeletal muscle and K to move out. When Na moves into the skeletal muscle, the sarcolemma is _____________.
Depolarized
What shiny white structure allows for smooth movement at the joints?
Cartilage
List the 4 functions of muscles.
1. movement 2. maintain posture 3. stabilize joints 4. generate heat
Myoglobin
What binds to the myosin head to allow for cross-bridge formation?
ADP and P
What happens to calcium after the action potential ends?
Calcium is removed from troponin and pumped back into the sarcoplasmic reticulum via active transport.
The portion connected to the radius.