Tag: science & technology

Most digestion and nutrient absorption occurs in the small intestine. The stomach primarily breaks down food with acid and enzymes. The liver produces bile, and large intestine absorbs water - neither is the primary digestion site.

All four statements are true. A: Triangle interior angles sum to 180° (fundamental property). B: Triangle inequality theorem - any two sides sum exceeds the third. C: Exterior angles (one per vertex) sum to 360°. D: Exterior angle theorem - exterior angle equals sum of remote interior angles.

Dialysis is a medical procedure that artificially performs the kidney's function of filtering blood, removing waste products and excess fluids when kidneys fail. It is primarily used for end-stage renal disease or acute kidney injury where the kidneys can no longer function properly.

A biopsy is a medical procedure where tissue is extracted from a LIVING patient for microscopic examination. Post-mortem tissue examination is called an autopsy. Blood draws (phlebotomy) from veins or arteries are separate diagnostic procedures, not biopsies.

Diabetes (specifically Type 1) is caused by insufficient insulin production by the pancreas. Insulin regulates blood sugar levels - without it, glucose cannot enter cells efficiently. Sugar doesn't "cause" diabetes (though excess intake is a risk factor for Type 2), and vitamin deficiency is unrelated.

Malaria is a parasitic infection that primarily affects the spleen, causing splenomegaly (enlarged spleen). The Plasmodium parasite infects and destroys red blood cells. The spleen works overtime to filter these damaged cells, leading to its characteristic enlargement. The heart, lungs, and kidneys are not the primary target organs.

Newborns have approximately 270-300 bones at birth, which fuse together during growth to become 206 bones in adults. Option C is the closest correct answer.

The liver is the largest gland in the human body, weighing approximately 1.5 kg. It performs over 500 functions including metabolism, detoxification, and bile production. The thyroid and pancreas are much smaller.

Calcium phosphate (specifically hydroxyapatite) is the main mineral component of bones and teeth, providing hardness and strength. Calcium carbonate is found in seashells, while sulphate and nitrate are not structural components of bone.

Nuclear fission is indeed highly exothermic (A) - it releases large amounts of energy when heavy nuclei split. Neutrons are typically used to trigger fission reactions (C) because they're electrically neutral and can penetrate the nucleus. Option B is wrong because fission releases energy (exothermic). Option D is wrong because power plants use controlled fission, not uncontrolled.