Skeletal muscle

Question 1

Mean Integrated EMG is another phrase for:

Answer 1

motor units recruited

Question 2

What axis is Mean Integrated EMG plotted on?

Answer 2

X axis

Question 3

What axis is force plotted on

Answer 3

Y axis

Question 4

How to calculate percent of motor units activated when muscle had fatigued to 50% of maximum strength

Answer 4

(Mean Integrated EMG at 50% Force)/(Mean Integrated EMG at Max Force)×100%

Question 5

Muscular fatigue recruitment

Answer 5

More than 90% of motor units are recruited at 50% of maximum force

Question 6

Why does muscular fatigue occur?

Answer 6

muscles are tired

Question 7

Central fatigue recruitment

Answer 7

Less than 90% of motor units are recruited at 50% of maximum force

Question 8

Why does central fatigue occur?

Answer 8

psychological and motivation

Question 9

When does neuromuscular fatigue occur?

Answer 9

if there was no more ACh at the neuromuscular junction

Question 10

If grip strength was weaker and endurance of my hand muscles was poorer than the class, what would happen to red and white muscle fiber percentages?

Answer 10

neither an increase percentage of white muscle fibers nor red muscle fibers

Question 11

If grip strength was stronger and endurance of my hand muscles was greater than the class, what would happen to red and white muscle fiber percentages?

Answer 11

a greater percentage of white muscle fibers and red muscle fibers

Question 12

If grip strength was greater and endurance of my hand muscles was weaker than the class, what would happen to red and white muscle fiber percentages?

Answer 12

a greater percentage of white muscle fibers

Question 13

If grip strength was weaker and endurance of my hand muscles was greater than the class, what would happen to red and white muscle fiber percentages?

Answer 13

a greater percentage of red muscle fibers