What is the primary focus of this lesson?

• Digestive system

• Respiratory system

• Muscular and skeletal system

• Cardiovascular system

What is one of the learning objectives of this lesson?

• Describe the respiratory cycle

• Understand the structure of the heart

• Explain the process of digestion

• Identify the action of an agonist and an antagonist

Tags

NGSS.MS-LS1-7

Why do muscles work in pairs?

• To create movement in two directions

• To increase muscle strength

• To reduce muscle fatigue

• To improve blood circulation

What is the role of the agonist muscle?

• To stabilize the joint

• To provide sensory feedback

• To contract and create movement

• To relax and lengthen

During the upward phase of a bicep curl, which muscle acts as the antagonist?

• Bicep

• Hamstrings

• Tricep

• Quadriceps

What type of contraction occurs when a muscle produces force but stays the same length?

• Isometric

• Eccentric

• Concentric

• Isotonic

Which type of contraction involves a muscle shortening while it contracts?

• Isometric

• Concentric

• Eccentric

• Static

During the downward phase of a squat, what type of contraction do the quadriceps undergo?

• Static

• Isometric

• Concentric

• Eccentric

When the leg bends at the knee joint, which muscle is the agonist?

• Quadriceps

• Hamstrings

• Gastrocnemius

• Tibialis anterior

What type of contraction do the quadriceps undergo when the leg bends at the knee joint?

• Isometric

• Static

• Eccentric

• Concentric