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…

Why Do Your Fingers Become Wrinkled After Spending A Long Time In Water? They absorb large amounts of water Nervous system causes blood vessels to constrict Your skin temporarily loses…

Which Sense Is Most Strongly Associated With Triggering Vivid Memories? Smell Touch Hearing Sight Did You Know! An overactive spleen can actually lower several types of blood cells at once….

Which Healthy Habit Can Benefit Your Heart, Brain, Immune System, And Mood? Getting adequate sleep Staying awake all night Skipping meals Avoiding all physical activity Did You Know! An enlarged…