Tag: science & technology

When blood supply to the brain is completely interrupted (as in cardiac arrest), unconsciousness typically occurs within 8-10 seconds due to the rapid depletion of oxygen in cerebral tissues. The brain has minimal oxygen reserves and cannot sustain consciousness without continuous blood flow. Earlier timeframes (2-6 seconds) are too brief for complete oxygen depletion.

Although the brain represents only about 2% of body weight, it consumes approximately 20% of the body's total oxygen supply due to its high metabolic rate. This disproportionate oxygen usage reflects the brain's intense energy demands for neural signaling and maintaining cellular functions. Options A (10%) is too low, while C (30%) and D (80%) are too high.

TTRAM (Twin Transistor Random Access Memory) is a novel memory technology that uses two transistors per memory cell instead of the traditional one-transistor-one-capacitor (1T1C) DRAM design. The twin-transistor configuration improves data retention and reduces leakage current. Options A and D incorrectly use 'triode' (a vacuum tube term), while C says 'Triple' instead of 'Twin'.

The human brain is approximately 75% water by weight, similar to the water content of many other organs. This high water content is essential for biochemical reactions, nutrient transport, and maintaining cellular structure. Options A (10%) is far too low, B (50%) underestimates, and D (90%) is slightly too high for brain tissue.

Z-RAM (Zero Capacitor Random Access Memory) is a type of DRAM that uses the floating body effect of a transistor to store charge instead of a capacitor. Unlike options A and B that incorrectly suggest Z stands for 'zenith' or 'zinc', the Z specifically means 'zero' capacitor. Option C is incorrect because it misspells 'Access' as 'Access Memory'.

Google Alerts allows you to receive email notifications whenever new results appear for your specified search terms, making it ideal for tracking celebrity news and updates. When you set up an alert for a celebrity's name, you'll automatically get the latest news mentioning them.

Ostriches are unique among birds in having only two toes on each foot - an adaptation for running. Most birds have three or four toes.

Hummingbirds lay the smallest eggs of any living bird species - their eggs are about the size of a coffee bean or jellybean.

African elephants have the longest gestation period of any land animal, approximately 22 months. 21 months is the closest correct option provided.