1. What is the smallest bone in the human body?
a. Femur
b. Stapes
c. Humerus
d. Sternum
Answer: b. Stapes
2. Which organ is responsible for filtering blood in the human body?
a. Liver
b. Lungs
c. Kidneys
d. Stomach
Answer: c. Kidneys
3. Where is the humerus bone located?
a. In the skull
b. In the upper arm
c. In the thigh
d. In the lower leg
Answer: b. In the upper arm
4. What is the function of red blood cells?
a. To fight infections
b. To carry oxygen
c. To clot blood
d. To produce hormones
Answer: b. To carry oxygen
5. What is the largest internal organ in the human body?
a. Heart
b. Brain
c. Liver
d. Pancreas
Answer: c. Liver
6. How many chambers does the human heart have?
a. 2
b. 3
c. 4
d. 5
Answer: c. 4
7. What is the main function of the alveoli in the lungs?
a. To pump blood
b. To exchange oxygen and carbon dioxide
c. To protect the lungs
d. To produce mucus
Answer: b. To exchange oxygen and carbon dioxide
8. Which part of the brain is responsible for balance and coordination?
a. Cerebrum
b. Cerebellum
c. Medulla oblongata
d. Hypothalamus
Answer: b. Cerebellum
9. What type of joint is found in the shoulder?
a. Ball and socket
b. Hinge
c. Pivot
d. Gliding
Answer: a. Ball and socket
10. Which blood vessel carries oxygen-rich blood away from the heart?
a. Veins
b. Capillaries
c. Arteries
d. Aorta
Answer: d. Aorta
11. What is the basic structural unit of the nervous system?
a. Muscle fiber
b. Neuron
c. Osteocyte
d. Epithelial cell
Answer: b. Neuron
12. Which layer of the skin contains sweat glands?
a. Epidermis
b. Dermis
c. Hypodermis
d. Stratum corneum
Answer: b. Dermis
13. How many pairs of ribs does the human body have?
a. 10
b. 12
c. 14
d. 16
Answer: b. 12
14. What is the primary function of the pancreas?
a. To filter toxins
b. To secrete digestive enzymes and insulin
c. To store bile
d. To regulate body temperature
Answer: b. To secrete digestive enzymes and insulin
15. Which muscle is known as the "calf muscle"?
a. Biceps brachii
b. Quadriceps
c. Gastrocnemius
d. Trapezius
Answer: c. Gastrocnemius
16. What part of the eye controls the amount of light entering?
a. Retina
b. Iris
c. Cornea
d. Lens
Answer: b. Iris
17. Which part of the digestive system absorbs most nutrients?
a. Stomach
b. Small intestine
c. Large intestine
d. Esophagus
Answer: b. Small intestine
18. What is the name of the protein that carries oxygen in the blood?
a. Hemoglobin
b. Myosin
c. Keratin
d. Albumin
Answer: a. Hemoglobin
19. Where is the thyroid gland located?
a. In the abdomen
b. In the neck
c. In the brain
d. In the chest
Answer: b. In the neck
20. What is the main function of the spleen?
a. To filter blood and fight infections
b. To produce insulin
c. To store bile
d. To pump blood
Answer: a. To filter blood and fight infections
21. Which part of the ear helps maintain balance?
a. Cochlea
b. Eardrum
c. Semicircular canals
d. Auditory nerve
Answer: c. Semicircular canals
22. What type of tissue connects bones to muscles?
a. Ligament
b. Tendon
c. Cartilage
d. Fascia
Answer: b. Tendon
23. Which organ is primarily responsible for detoxification?
a. Lungs
b. Liver
c. Kidneys
d. Spleen
Answer: b. Liver
24. Which is the longest bone in the human body?
a. Tibia
b. Femur
c. Humerus
d. Radius
Answer: b. Femur
25. What is the main function of platelets in the blood?
a. To transport oxygen
b. To fight infections
c. To clot blood
d. To carry nutrients
Answer: c. To clot blood
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