HBS-Muscle Contraction

A bundle of fascicles best describes a

• muscle fiber
• muscle tissue
• myofibril
• tendon

Tags

NGSS.HS-LS1-2

What layer of connective tissue covers the muscle fiber?

• epimysium
• endomysium
• perimysium

The organelle containing actin and myosin identified as #9

• ACh
• Sarcolemma
• Vesicle
• Myofibril

Muscles are attached to bones by _____.

• Ligaments
• Tendons
• Cartilage
• Axons

The organelle that contains actin and myosin.

• Tendon
• myofilament
• myofibril
• Fiber

Another name for a muscle cell.

• Fiber
• Sacrolemma
• Sacromere
• Fascicle

Contractile unit of a muscle.

• sarcomere
• motor unit
• fascicle
• myofibril

Thick filaments are in a myofibril are

• ATPase
• Sarcoplasmic reticulum
• Actin
• Myosin

Thin filaments in a myofibril are

• Sarcomeres
• Sarcoplasm
• Actin
• Myosin

What two chemicals are necessary for muscle contraction to occur?

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