Knowledge Check #4.2

Hypertrophy means

• an increase in muscle size

• an decrease in muscle size

• an increase in muscle size due to disease

• an decrease in muscle size due to disease

Dystrophy means

• an increase in muscle size

• a decrease in muscle size

• an increase in muscle size due to disease

• a decrease in muscle size due to disease

Atrophy means

• an increase in muscle size

• a decrease in muscle size

• an increase in muscle size due to disease

• a decrease in muscle size due to disease

Actin and myosin

• are responsible for muscle contraction

• anchor inside of the muscle cell to the outside

• protect the cell from damage during contraction

• are enzymes that store energy for muscle cells to use during contraction

Creatine Kinase (CK)

• is responsible for muscle contraction

• anchors inside of the muscle cell to the outside

• protects the cell from damage during contraction

• is an enzyme that stores energy for muscle cells to use during contraction

dystrophin

• is responsible for muscle contraction

• anchors inside of the muscle cell to the outside

• protect the cell from damage during contraction

• is an enzyme that stores energy for muscle cells to use during contraction

The three muscle types are

• smooth

• skeletal

• cardiac

• rough

People with DMD have ______ dystrophin levels

• low
• high

• medium

• steady

Tags

NGSS.HS-LS3-2

Dystrophin and dystrophy are the same thing

• True, dystrophin is plural and dystrophy is singular

• False, dystrophin is a protein and dystrophy is the loss of muscle due to disease

• False, dystrophin is the loss of muscle due to disease and dystrophy is a protein in the body

• True, dystrophy is plural and dystrophin is singular

Muscle cells are larger than myosin & actin

• True

• False