lab 5; muscle pays

Question 1

A motor neuron and all of the muscle fibers it stimulates.

Answer 1

motor unit

Question 2

The space where a motor neuron and a muscle fiber meet. (synapticknob and sarcolemma

Answer 2

neuromuscular junction

Question 3

An action potential in a muscle fiber.

Answer 3

motor impulse

Question 4

More motor units sending AP’s to more muscle fibers- increases force in a whole muscle

Answer 4

motor unit recruitment

Question 5

When AP’s are sent so frequently that the fiber cannot completely relax before the next contraction. Increases force in a single muscle fiber.

Answer 5

summation

Question 6

When AP’s are sent so frequently that the fiber cannot relax at all.

Answer 6

tetanus

Question 7

When a muscle loses the ability to contract. Due to the buildup of lacticacid or depletion of electrolytes

Answer 7

fatique

Question 8

When a few fibers undergo sustained contraction while the rest of themuscle is at rest. Maintains posture

Answer 8

muscle tone

Question 9

A contraction that produces limb movement. The muscle shortens during an isotonic contraction

Answer 9

isotonic contraction

Question 10

A contraction that produces tension without movement. The muscle does NOT shorten during an isometric contraction

Answer 10

isometric contractions