Vocab
Sarcomere
the repeating unit of a myofibril
a
actin myofilament, no
a
epimysium
What neurotransmitter carries the message from the axon for muscles to contract? What molecule deactivates this neurotransmitter?
Acetylcholine, Acetylcholinesterase
What are the three methods of generating ATP?
Aerobic Cellular Respiration, Creatine Phosphate, Anaerobic Cellular Respiration
Motor Unit
one motor neuron and all the muscle fibers it innervates
b
myosin myofilament, no
b
perimysium
If a muscle is stiff, there is not enough ________ in the cells.
ATP
What method generates the most ATP?
Aerobic Cellular Respiration
Synapse
The interface between a neuron and another cell
H zone, yes
c
endomysium
How does the action potential get to the sarcoplasmic reticulum?
T-tubule
Which methods don't require oxygen?
Creatine Phosphate, Anaerobic Cellular Respiration
All-or-none law of skeletal muscle contraction
an individual muscle fiber contracts with equal force in response to each action potential
e
A band, no
d
myofibril/muscle cell/fiber
What type of stimulus occurs with one action potential in a motor neuron
threshold stimulus
Lactic Acid Buildup comes from?
Anaerobic Cellular Respiration
Muscle Tone
the state of partial contraction in a muscle, even when the muscle is not being used
f
I band, yes
e
fascicle
What happens between the power stroke and the return stroke?
ATP binds to the myosin heads, causing them to release the active sites
What are the reactants of Aerobic Cellular respiration?
Glucose and Oxygen