Muscle System

Thin filaments in a myofibril are

• Sarcomeres

• Sarcoplasm

• Actin

• Myosin

You do a push up. Which muscle would be a primer mover?

• Pectoralis Major

• Biceps Brachii

• Latissimus Dorsi

• Rectus Femoris

You do a push up. Which muscle would be synergist?

• Pectoralis Major

• Triceps Brachii

• Latissimus Dorsi

• Rectus Femoris

How many ATP molecules are used during a cross bridge cycle between an individual myosin head and actin filament?

• 0

• 1

• 2

• 4

Tags

NGSS.MS-LS1-2

What role does calcium play in muscle contraction?

• Releases actin

• Exposes myosin

• Connects tissues

• Cushions bones

What do tendons connect?

• Bones to other bones

• Muscles to bone

• Muscles to muscles

• Tissues to tissues

What is a fascicle?

• A type of muscle

• A cluster of muscle fibers

• A connective tissue

• A bone structure

Where does a muscle begin and remain stationary?

• Insertion

• Origin

• Epimysium

• Endomysium

What is the point where the muscle ends and creates movement?

• Origin

• Insertion

• Epimysium

• Endomysium

What is the process by which a muscle shortens or contracts?

• muscle relaxation

• muscle elongation

• muscle contraction

• muscle expansion

Tags

NGSS.MS-LS1-3

NGSS.MS-LS1-7