WorksheetsKI2304 - Lecture 1 Review
Total questions: 7
Worksheet time: 5mins
Which of the following energy systems is the primary source of fuel over the first 0-10 seconds of exercise?
Glycolytic
ATP-Phosphagen
Oxidative
A motor neuron and all of the muscle fibers it's connected to describes what?
Muscle Fasciculi
Motor Unit
Motor Filament
What is the role of tropomyosin in muscle contraction?
It binds calcium ions.
It provides elasticity to the muscle.
It blocks the myosin-binding sites on actin molecules.
It hydrolyzes ATP for energy.
What term in exercise physiology do we most commonly use to describe a stimulus?
Action Potential
Power Stroke
Twitch
Reorder the following to accurately describe sliding-filament theory:
An action potential travels down the motor neuron.
At the neuromuscular junction, acetylcholine is released.
The sarcoplasmic reticulum releases calcium.
Calcium binds to troponin causing tropomyosin to shift.
Myosin binds to actin, uses energy from ATP, and a "power stroke" occurs
Which of the following is not a characteristic of Type II muscle fibers?
Fast Contraction Speeds
High Fatigability
High Mitochondrial Density
High Force Production
An individual who is an elite, Olympic-level endurance athlete, would likely have a higher proportion of _____ fibers?
Type I
Type II
Type X
