Muscle structure and contraction

Another name for a muscle cell is...

• muscle fiber
• fascicle
• sarcomere
• thick filament

Sarcolemma is another name for...

• cell membrane
• cytoplasm
• endoplasmic reticulum
• mitochonrdia

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

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

The basic functional unit of a muscle fiber separated by the Z lines is called _____.

• sarcolemma
• sarcomere
• filaments
• myofibril

What is number 2?

• perimysium
• epimysium
• muscle fiber

• endomysium

What is number 3?

• perimysium
• epimysium
• fascicle
• endomysium

Tags

NGSS.HS-LS1-2

What is number 4?

• perimysium
• muscle fiber
• fascicle
• endomysium

What is number 5?

• myofibril

• muscle fiber
• fascicle
• endomysium

What is number 7?

• perimysium
• muscle body
• fascicle
• tendon

A cross bridge is the connection between which two proteins?

• actin/myosin
• actin/troponin
• myosin/tropomyosin
• actin/z-line