Mnemonics + Tables (EXTRA HELP EXXAM 3) PT 2
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EXTRA HELP EXXAM 3
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4 Terms
Describe the neuromuscular junction.
The NMJ is where the Axon Terminals... ...meet the Skeletal Muscle... ...right in the Middle.
Define depolarization, and describe the events that follow it. (PT 2)
Phase | Ion Movement | Charge Change |
Depolarization | Sodium (NA+) Rushes In | Becomes Positive (+) |
Repolarization | Potassium (K+) Rushes Out | Becomes Negative (-) |
Depolarization wants to turn on the switch, and Repolarization wants to turn off the switch.
Compare concentric and eccentric contractions. (PT 2)
Type | Winner? | Result |
Concentric | Tension > Load | Muscle Shortens |
Eccentric | Load > Tension | Muscle Elongates |
Explain the function of sodium-potassium ion pumps. (PT 2)
Sodium removes positive charge
Potassium adds positive charge.
It wants to maintain resting potential
