Why Can Standing Up Very Quickly Sometimes Make You Feel Dizzy? Your brain temporarily shrinks Your lungs stop absorbing oxygen Your ears temporarily stop working Blood pressure can briefly fall…

Which Action Uses Muscles Even Though You May Barely Notice You're Doing It? Growing hair Blinking Growing fingernails Producing red blood cells Did You Know! Glaucoma can damage vision before…

What Unusual Effect Can Holding Your Nose Have While Eating Food may seem less flavorful Food becomes physically sweeter Your taste buds temporarily multiply Salty foods become smoother Did You…

What Unusual Ability Does Your Stomach Lining Have? It glows in darkness It never contains bacteria It stops working while you sleep It regularly renews itself Did You Know! Some…

What Usually Happens To Your Heart Rate When You take A Slow, Deep Breath In? It stops briefly It tends to increase slightly It always drops by half It remains…

Why Does Your Nose Sometimes Run When you Eat Spicy Food? Your body thinks you're sick Spicy compounds stimulate nerves in the nose Your stomach produces extra water Your blood…

Which Organ Can Regenerate A Substantial Amount Of Lost Tissue? Thyroid Bladder Heart Liver Did You Know! Muscle symptoms don’t always appear during exercise—they can show up afterward. Some metabolic…

Which Everyday Activity Can Temporarily Increase Saliva Production? Looking at a clock Smelling or thinking about food Putting on shoes Closing your eyes Did You Know! Certain muscle diseases can…

Which Body Part Contains Some Of The Strongest Muscles Relative To Their Size? Jaw Wrist Ankle Eyelid Did You Know! Some muscle disorders can make muscles look unusually large—even when…