How Muscles Contract

Which type of human body tissue can contract, or shorten?

• epithelial tissue

• connective tissue

• muscle tissue

• nerve tissue

Tags

NGSS.HS-LS1-7

How do pairs of skeletal muscles work together?

• One contracts and the other stretches.

• While one muscle in the pair contracts, the other returns to its original length.

• Both muscles extend at the same time.

• One muscle in the pair pulls on a bone, while the second muscle pulls on the first muscle.

When a muscle contracts, it _______

• gets longer

• gets shorter

• gets thinner

• grows hair

Cardiac muscle is a _______________ muscle.

• involuntary

• voluntary

​ (a)   a muscle contraction that changes the length of a muscle ex:​ (b)  

​ (c)   no change in the length of the muscle ex:​ (d)  

• Isotonic

• Isometric

• doing a push up

• doing a plank

When a muscle contracts, it _______

• gets longer

• gets shorter

• gets thinner

• grows hair

Which muscles are involuntary? Choose the BEST answer.

• skeletal

• smooth and cardiac

• smooth

• cardiac

Which type of human body tissue can contract, or shorten?

• epithelial tissue

• muscle tissue

• connective tissue

• nerve tissue

How do pairs of skeletal muscles work together?

• One muscle in the pair pulls on a bone, while the second muscle pulls on the first muscle.

• While one muscle in the pair contracts, the other returns to its original length.

• Both muscles extend at the same time.

• One contracts and the other stretches.

What is the primary molecule responsible for muscle contraction?

• ATP

• ADP

• NADH

• FADH2