Inside Your Head: Brain and Senses

What this quiz asks

• Which layer at the back of the eye contains the light-sensitive rods and cones?
• What is the scientific name for the sense that this organ provides?
• What are the cells that carry electrical signals through the nervous system called?
• Humans use only about 10% of their brains.
• Which snail-shaped part of the inner ear turns sound vibrations into nerve signals?
• Which lobe of the brain is mainly responsible for processing vision?
• Can the brain tissue itself feel pain?
• What is the tiny gap between two neurons, where chemical messengers pass the signal on, called?
• Different zones of the tongue detect different tastes, as the classic 'tongue map' shows.
• Select ALL of these that are among the basic tastes detected by the tongue.
• Each of your eyes has a blind spot where the optic nerve leaves the retina.
• Roughly how much does an average adult human brain weigh, in kilograms?
• During which stage of sleep do we have our most vivid dreams?
• Which hormone, released by the pineal gland as it gets dark, helps make us sleepy?
• Order the parts of the ear that sound passes through, from the outside in.
• Which seahorse-shaped part of the brain plays a key role in forming new memories?
• Select ALL of these that belong to the central nervous system.
• What is the name of the sense that tells you where your limbs are without looking?
• In 1848, which railway worker survived an iron rod blasting through his skull but emerged with a changed personality?
• Broca's area, identified by the French doctor Paul Broca, is mainly involved in what?