Muscles

Muscles — Questions & Answers

Explore Muscles through this engaging medium level Trivia Quiz designed for Grade 7-8 students. Master essential Body concepts while developing critical thinking and vocabulary skills. Perfect for classroom learning or independent practice.

1. What type of muscle is found in your arms and legs, and is responsible for voluntary movements?

   Cardiac muscle Smooth muscle Skeletal muscle Involuntary muscle

   ✓ Skeletal muscle

   Skeletal muscles are attached to bones and allow us to move our limbs and bodies voluntarily.

2. Which of these is NOT a primary function of muscles?

   Producing movement Generating heat Storing genetic information Maintaining posture

   ✓ Storing genetic information

   Storing genetic information is the function of DNA, found in the nucleus of cells, not muscles.

3. The muscle that pumps blood throughout your body is called:

   Biceps Heart muscle (Cardiac muscle) Diaphragm Quadriceps

   ✓ Heart muscle (Cardiac muscle)

   Cardiac muscle is the specialized muscle tissue that forms the heart and pumps blood.

4. Muscles that work in pairs to create movement are called:

   Antagonistic muscles Synergistic muscles Agonist muscles Fixator muscles

   ✓ Antagonistic muscles

   Antagonistic muscles work in opposition, like the biceps and triceps, to control movement at a joint.

5. Which of the following is a type of smooth muscle?

   Muscle in your bicep Muscle in your thigh Muscle in your stomach wall Muscle in your calf

   ✓ Muscle in your stomach wall

   Smooth muscles are found in the walls of internal organs like the stomach, intestines, and blood vessels, and are responsible for involuntary actions.

6. When you bend your elbow, which muscle contracts?

   Triceps Deltoid Biceps Pectoralis

   ✓ Biceps

   The biceps muscle contracts to bend the elbow, while the triceps muscle extends it.

7. What is the main protein responsible for muscle contraction?

   Collagen Keratin Actin and Myosin Hemoglobin

   ✓ Actin and Myosin

   Actin and myosin are the key protein filaments that slide past each other to cause muscle fibers to shorten and contract.

8. Which of the following is essential for muscles to function properly and prevent cramps?

   Iron Vitamin C Calcium and Potassium Vitamin D

   ✓ Calcium and Potassium

   Calcium and potassium are electrolytes that play crucial roles in muscle contraction and nerve signaling, helping to prevent cramps.

9. The diaphragm is a large muscle located below the lungs that helps us to:

   Digest food Pump blood Bend our knees Breathe

   ✓ Breathe

   The diaphragm contracts and relaxes to change the volume of the chest cavity, allowing air to move in and out of the lungs.

10. What happens to muscles when they are regularly exercised?

    They become weaker and thinner They stay the same size They become stronger and larger They turn into bone

    ✓ They become stronger and larger

    Regular exercise causes muscle fibers to grow in size and strength, a process called hypertrophy.