Q: Which organ produces the hormone renin that helps control blood pressure?
A: Kidney
Q: What is the basic structural unit of the human body?
A: Cell
Q: How many bones are present in an adult human body?
A: 206
Q: Which is the smallest bone in the human body?
A: Stapes
Q: Which is the longest bone in the human body?
A: Femur
Q: Which is the largest organ of the human body?
A: Skin
Q: Which is the heaviest internal organ?
A: Liver
Q: Which is the lightest bone in the human body?
A: Stapes
Q: Which is the hardest substance in the human body?
A: Tooth enamel
Q: What is the normal human body temperature?
A: 37°C or 98.6°F
Q: Which system controls body movements?
A: Nervous system
Q: How many muscles are in the human body?
A: Over 600
Q: Which is the strongest muscle based on function?
A: Masseter
Q: Which is the smallest cell in the human body?
A: Sperm cell
Q: Which is the largest cell in the human body?
A: Ovum
Q: How many chambers does the human heart have?
A: Four
Q: What is the functional unit of the kidney?
A: Nephron
Q: What is the average blood volume in humans?
A: About 4.5–5.5 liters
Q: What is the normal pH of human blood?
A: 7.4
Q: What is the lifespan of red blood cells?
A: 120 days
Q: Where are red blood cells produced?
A: Bone marrow
Q: What is the lifespan of white blood cells?
A: 12–20 days
Q: Which blood group is the universal recipient?
A: AB positive
Q: Which blood component helps in clotting?
A: Platelets
Q: What is the average human heart rate per minute?
A: 72 beats
Q: Which organ is called the graveyard of RBCs?
A: Spleen
Q: Which organ stores bile?
A: Gallbladder
Q: Which organ produces bile?
A: Liver
Q: Which is the largest gland in the human body?
A: Liver
Q: Which hormone regulates blood sugar levels?
A: Insulin
Q: Which organ produces insulin?
A: Pancreas
Q: Which vitamin is produced in the skin by sunlight?
A: Vitamin D
Q: Which part of the body contains the cochlea?
A: Inner ear
Q: Which bone protects the brain?
A: Skull
Q: What is the scientific name of the windpipe?
A: Trachea
Q: Which is the main excretory organ of the body?
A: Kidney
Q: Which blood vessels carry oxygenated blood?
A: Arteries
Q: Which blood vessels carry deoxygenated blood?
A: Veins
Q: Which part of the brain controls balance and coordination?
A: Cerebellum
Q: Which part of the brain controls breathing and heartbeat?
A: Medulla oblongata
Q: Which tissue connects muscles to bones?
A: Tendons
Q: Which tissue connects bone to bone?
A: Ligaments
Q: Which gas is exhaled during respiration?
A: Carbon dioxide
Q: Which gas is inhaled during respiration?
A: Oxygen
Q: What is the normal human blood pressure?
A: 120/80 mmHg
Q: Which gland is known as the master gland?
A: Pituitary gland
Q: Which hormone is called the emergency hormone?
A: Adrenaline
Q: Which part of the body has the thinnest skin?
A: Eyelids
Q: Which is the longest part of the digestive system?
A: Small intestine
Q: How many parts does the small intestine have?
A: Three — duodenum, jejunum, ileum
Q: Which mineral is essential for hemoglobin formation?
A: Iron
Q: Which mineral is essential for strong bones and teeth?
A: Calcium
Q: Which mineral is necessary for thyroid function?
A: Iodine
Q: What is another name for the voice box?
A: Larynx
Q: Who discovered the cell?
A: Robert Hooke
Q: How many bones are present in a newborn baby?
A: Around 270
Q: Which hormone controls sleep?
A: Melatonin
Q: Which part of the heart pumps blood to the body?
A: Left ventricle
Q: Which instrument measures blood pressure?
A: Sphygmomanometer
Q: Which is the largest part of the brain?
A: Cerebrum
Q: Which part of the brain is called the thinking part?
A: Cerebrum
Q: What protects the brain and spinal cord?
A: Cerebrospinal fluid
Q: Which gland produces tears?
A: Lacrimal gland
Q: Which part of the eye controls light entry?
A: Iris
Q: Where is the image formed in the eye?
A: Retina
Q: Which vitamin is essential for good eyesight?
A: Vitamin A
Q: Which disorder is caused by Vitamin A deficiency?
A: Night blindness
Q: Which waste products are excreted through sweat?
A: Urea and salts
Q: Which organ can regenerate itself completely?
A: Liver
Q: Which element causes Itai-itai disease?
A: Cadmium
Q: What deficiency causes rickets?
A: Vitamin D
Q: Who discovered the Rh factor?
A: Karl Landsteiner and Alexander S. Wiener
Q: In which animal was the Rh factor first identified?
A: Rhesus monkey
Q: How many pairs of spinal nerves are in humans?
A: 31 pairs
Q: Which hormone is called the fight-or-flight hormone?
A: Adrenaline
Q: Which protein is found in hair and nails?
A: Keratin
Q: Who is the carrier of dengue?
A: Female Aedes mosquito
Q: Which mosquito transmits the Plasmodium parasite?
A: Female Anopheles mosquito
Q: Which mosquitoes are night-biting?
A: Female Anopheles mosquitoes
Q: What is the full form of MRI?
A: Magnetic Resonance Imaging