Skeletal Muscle Microanatomy

Myofibrils are made up of two types of proteins known as?

• Actin and Myosin
• Troponin and Tropomyosin
• Myoglobin and hemoglobin
• none of these

The contractile unit of a muscle is called the __________.

• Sarcolemma
• Sarcoplasmic reticulum
• Sarcoplasm
• Sarcomere

List the structures of a muscle from smallest to largest

• myofibril, muscle fiber, fascicle, muscle
• fascicle, muscle, myofibril, muscle fiber
• fascicle, sarcomere, muscle, muscle fiber
• myofibril, muscle, fascicle, sarcomere

Tags

NGSS.HS-LS1-2

How many types of muscle tissues are there?

• 3

• 4

• 5

• 2

Where is the cardiac muscle located?

• Attached to the skeleton

• In the stomach

• In the heart

Where is the smooth muscle located?

• Attached to the skeleton

• In the stomach

• In the heart

True or false

The skeletal muscle is also known as voluntary muscle

• True

• False

The _______ is an involuntary muscle movement

• Cardiac muscle

• Skeletal muscle

• Rough muscle

The _______ is an involuntary muscle movement

• Cardiac muscle

• Skeletal muscle

• Rough muscle

Which 2 muscles are straited?

• Cardiac and smooth

• Cardiac and skeletal

• Skeletal and smooth