Muscles Quiz

What do muscles help you do in your body?

• Only help in moving bones

• Help in talking, walking, eating, and blinking

• Only help in digestion

• Only help in breathing

How many muscles work together when you take a step?

• 100 muscles

• 200 muscles

• 72 muscles

• 50 muscles

Which organs depend on muscles to move them?

• Heart and brain

• Lungs and stomach

• Kidneys and liver

• Eyes and ears

What percentage of a male's body weight is made up of muscle?

• 42%

• 39%

• 50%

• 35%

How can you find the approximate weight of your muscles?

• Multiply your weight by 0.42 or 0.39

• Add 42 or 39 to your weight

• Divide your weight by 0.42 or 0.39

• Subtract 42 or 39 from your weight

What is the primary function of muscle cells?

• To contract and shorten

• To expand and lengthen

• To maintain the same length

• To dissolve and regenerate

What happens when a muscle relaxes?

• It gets thicker

• It shortens

• It grows longer and thinner

• It detaches from the bone

Why do muscles work in pairs?

• Because they can only pull, not push

• Because they can only push, not pull

• Because they can expand and contract simultaneously

• Because they attach to multiple bones at once

What substance collects in the muscles when they are overworked and makes it harder for them to contract?

• Oxygen

• Nutrients

• Lactic acid

• Carbon dioxide

Why do muscles need a constant supply of nutrients and oxygen?

• To create heat

• To move blood

• To contract and relax

• To deliver materials and do their job