Choose the correct answer
- Cells differ from each other in ...........
a. shapes only.
b. sizes only.
c. shapes and sizes.
d. neither shapes nor sizes.
- All the following are from the characteristics of muscle cells, except that they ...........
a. are in the form of long fibers.
b. can work alone due to their large sizes.
c. must be able to store and use energy quickly.
d. can be bundled together to form tissues.
- The muscle is considered as ...........
a. a cell.
b. a tissue.
c. an organ.
d. a system.
- Among the organs of musculoskeletal system are ...........
a. muscles and bones of arm.
b. muscles and bones and lungs.
c. bones and heart.
d. lungs and heart.
- Musculoskeletal system allow the body to ...........
a. digest food.
b. move from a place to another.
c. transmit nutrients.
d. exchange oxygen and carbon dioxide.
- Your leg moves due to contraction and relaxation of ........... connected to the bones of leg.
a. hairs
b. toes
c. skin
d. muscles
Put (true) or (false)
- The endocrine system releases enzymes to fight the danger or to run away from it.
- When the skeletal muscles contract the bones move in two directions
- When the heart contracts it transports nutrients and gases only to all body parts
- You can control the movement of the cardiac muscles
- When you bend your arm the back muscle of upper arm relaxes
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