Muscle Types and Functions Quiz

What is an antagonistic pair in skeletal muscles?

• Two muscles that work together.

• A muscle that only contracts.

• A muscle that only relaxes.

• A muscle that produces heat.

What is a concentric contraction?

• When a muscle gets longer and thinner.

• When a muscle gets shorter and fatter.

• When a muscle produces heat.

• When a muscle stays the same length.

What is an isometric contraction?

• When a muscle shortens or lengthens.

• When a muscle produces heat.

• When a muscle stays the same length.

• When a muscle gets shorter and fatter.

Which type of muscle fibers have more mitochondria?

• Fast twitch fibers

• Slow twitch fibers

• Both fast and slow twitch fibers

• Neither fast nor slow twitch fibers

Which type of muscle fibers would be more beneficial for a marathon runner?

• Fast twitch fibers

• Slow twitch fibers

• Both fast and slow twitch fibers

• Neither fast nor slow twitch fibers

What is the primary source of energy for the alactic system during very high-intensity work?

• Glycogen

• Lactic acid

• Creatine phosphate (CP)

• Fatty acids

What happens to the muscles when the fuel sources for anaerobic energy production are used up?

• They become stronger

• They become tired and painful

• They become more flexible

• They become more efficient

What is the role of ATP in muscle actions?

• It provides oxygen to the muscles

• It acts as a waste product

• It supplies energy to the muscles

• It cools down the muscles

What is the waste product created from producing energy in the aerobic system?

• Lactic acid

• Carbon dioxide

• Glycogen

• ATP

What is the effect of increased stores of myoglobin in slow twitch muscle fibers?

• It means the muscle can produce more force.

• It means the muscle can work at a high intensity for longer.

• It means up to 80% more oxygen can be taken into the muscle.

• It means the muscle can become more efficient at using fats as fuel.