Mnemonics + Tables (EXTRA HELP EXXAM 3) PT 1

EXTRA HELP EXXAM 3

Describe the neuromuscular junction.​

1. Motor: Axon terminals of motor neurons

2. Muscle: Skeletal muscle fiber

3. Midway: Exactly where they meet

Describe the relationship between the number of fibers in a motor unit and the precision of body movements.​

Fewer fibers = finer movements

Define depolarization​, and describe the events that follow it.​

1. SOdium in (Depolorization)

2. POtassium out (Repolarization)

“SO-IN , PO-OUT”

Compare concentric and eccentric contractions.​

1. Concentric = Contracting

2. Eccentric = Elongating

Explain the function of​ sodium-potassium ion pumps.​

3-2-1 NOK

3 Sodium out, 2 Potassium in.

Name the three types of muscle​ tissue, identify where they are​ found, and list their functions.​

1. Skeletal = Pull: It’s attached to bones and pulls to create movement.

2. Cardiac = Pump: Forms heart and pumps “propels” blood.

3. Smooth = Push: It’s in hollow tubes like the gut and pushes substances through.

Compare the central and peripheral nervous system.

Central (CNS): Core. Controls brain and spinal cord.

Peripheral (PNS): Outside. Nervous tissue outside central and enteric.

Define excitatory postsynaptic potential​ (EPSP) and inhibitory postsynaptic potential ​(IPSP).

EPSP = Excited (Entrance of positive ions) Graded depolarization. Gets closer to firing.

IPSP = Inhibited graded hyperpolarization. To keep from firing.