How your muscular system works - Emma Bryce

How many muscles do we have in our body? 

• 200

• 65

• 3

• over 650

What type of muscle tissue is only found in the heart?

• smooth

• skeletal

• cardiac

What causes muscle fibers to contract?

• DNA instructs muscle fibers when to contact.

• They receive signals from the nervous system.

• Signal cells called contractocytes signal the cells to contract.

What type of connective tissue connects muscles to bones?

• fatty tissue

• ligaments

• tendons

What allows us to pick up a book?

• The biceps shortens (contracts) while the triceps lengthens (relaxes).

• The triceps shortens (contracts) while the biceps lengthens (relaxes).

Where is the smallest muscle of the body located?

• in the ear (stapedius)

• the chest (pectorals)

• on the arm (biceps)

• the jaw (buccinator)

Approximately what percentage of body weight is made up of skeletal muscles?

• 10-20%

• 75%

• 30-40%

• 20-30%

TRUE or FALSE:  Skeletal muscles are under your conscious control.

• TRUE

• FALSE

What type of muscle fiber reacts quickly and would be found in the legs of a sprinter?

• slow twitch

• fast twitch

How does the muscular system help to maintain homeostasis?

• It removes heat from the blood to cool the core of the body.

• The muscular system does not play a role in homeostasis.

• It generates heat that is distributed around the body.