General Science MCQs – Human Body (Job Test Preparation in Pakistan)
Which is the largest organ in the human body?
The skin is the largest organ, covering the entire body and protecting internal organs.
Total number of bones in an adult human body is?
An adult human body has 206 bones, which provide structure and protection.
Human heart has how many chambers?
The human heart has four chambers: two atria and two ventricles.
Which organ filters waste from the blood?
The kidneys filter waste and excess fluids from the blood to form urine.
Breaking down food into simpler form is the job of?
The digestive system breaks down food into nutrients for absorption.
Muscle type found in the heart is?
Cardiac muscle is unique to the heart and enables its continuous pumping action.
Which part of the brain handles balance and coordination?
The cerebellum is responsible for balance, coordination, and fine motor control.
Which system defends the body against disease?
The immune system protects the body from infections and diseases.
Gas exchange in the lungs happens in?
Alveoli are tiny sacs in the lungs where oxygen and carbon dioxide are exchanged.
Which part of the eye controls light entry?
The iris adjusts the size of the pupil to control the amount of light entering the eye.
Which type of joint is found in the shoulder?
The shoulder joint is a ball-and-socket joint, allowing a wide range of motion.
Insulin is produced by which organ?
The pancreas produces insulin, which regulates blood sugar levels.
Humans have how many pairs of ribs?
Humans typically have 12 pairs of ribs that protect the chest cavity.
Which is the largest artery in the body?
The aorta is the largest artery, carrying oxygenated blood from the heart to the body.
Main job of large intestine is?
The large intestine absorbs water and electrolytes from digested food.
Liver helps digestion by?
The liver produces bile, which aids in the digestion and absorption of fats.
Which organ removes waste from blood?
The kidneys filter waste and excess substances from the blood.
Main hearing part of the ear is?
The cochlea converts sound vibrations into nerve signals for the brain.
Hair and nails are mostly made of?
Keratin is a tough protein that makes up hair, nails, and the outer layer of skin.
Which system controls hormone production?
The endocrine system produces and regulates hormones throughout the body.
Nutrient absorption mainly occurs in?
The small intestine is where most nutrient absorption takes place.
Which organ stores bile?
The gallbladder stores and concentrates bile produced by the liver.
Body temperature is regulated by?
The hypothalamus acts as the body's thermostat, regulating temperature.
Which system controls body coordination?
The nervous system coordinates voluntary and involuntary actions.
Red pigment in blood is called?
Hemoglobin is the protein in red blood cells that carries oxygen.
Which part of the body controls reflex actions?
The spinal cord mediates reflex actions without input from the brain.
Basic functional unit of kidney is?
The nephron is the functional unit of the kidney, filtering blood to form urine.
Number of muscles in the human body is around?
The human body contains approximately 600 muscles.
Which part of the brain controls heartbeat and breathing?
The medulla controls vital autonomic functions like heartbeat and breathing.
Clear front part of the eye is called?
The cornea is the transparent front layer of the eye that focuses light.
Which gland controls growth?
The pituitary gland releases growth hormone, regulating growth and development.
Bone protecting the brain is?
The skull protects the brain from injury.
Which part of the skin contains sweat glands?
The dermis layer of the skin contains sweat glands and blood vessels.
Main function of red blood cells is?
Red blood cells transport oxygen from the lungs to body tissues.
Which vitamin helps in blood clotting?
Vitamin K is essential for the synthesis of proteins involved in blood clotting.
The smallest bones in the body are found in the?
The stapes in the middle ear is the smallest bone in the body.
Which blood cells fight infection?
White blood cells defend the body against infectious diseases.
Primary taste buds are located on the?
Taste buds on the tongue detect sweet, sour, salty, bitter, and umami flavors.
Which organ maintains body posture?
The spine supports the body and maintains posture.
Breathing rate is controlled by which part of brain?
The medulla regulates breathing rate based on the body's needs.
Which part of the body contains the vocal cords?
The larynx houses the vocal cords, enabling speech and sound production.
Main role of white blood cells is to?
White blood cells are key components of the immune system.
Which gland controls metabolism?
The thyroid gland produces hormones that regulate metabolism.
The flap that prevents food from entering the windpipe is?
The epiglottis closes over the windpipe during swallowing.
Which bone is commonly known as the collarbone?
The clavicle, or collarbone, connects the arm to the body.
The liquid part of blood is called?
Plasma is the liquid component of blood that carries cells and nutrients.
Which part of the brain helps in learning and memory?
The cerebrum is responsible for higher brain functions, including learning and memory.
Which organ is mainly responsible for detoxifying chemicals?
The liver detoxifies chemicals and metabolizes drugs.
Which hormone controls sugar level in blood?
Insulin regulates blood glucose levels by facilitating cellular uptake of sugar.
Which part of the digestive system absorbs water?
The large intestine absorbs water and electrolytes from digested food.