Muscular System

What type of muscle tissue is found in the heart?

• skeletal

• smooth

• cardiac

• voluntary

Muscles move bones by

• pushing

• pulling

• both pushing and pulling

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

The elbow bends when

• the biceps muscle contracts

• the triceps muscles contracts

• the biceps muscle relaxes

• the triceps muscle relaxes

Muscles contract when

• thin filaments slide past thin filaments

• thick filaments slide past thick filaments

• thin filaments slide past thick filaments

The thick filament is composed of: 

• Myosin
• Actin

The thin filament is composed of: 

• Myosin
• Actin

Involuntary

• skeletal
• cardiac
• smooth
• smooth and cardiac

attached to bones

• cardiac
• smooth
• skeletal

What two chemicals are necessary for muscle contraction to occur?

• Niacin and Potassium
• Calcium and ATP
• Sodium and Potassium
• Ach and Potassium

Skeletal Muscle contraction is initiated when the ________ sends a message to the muscle cell.  

• Muscle cell
• Neuron
• Gland
• None of the above