86. Which hydrates your body better: plain water or milk?
A) Water
B) Milk
B) Milk ✅
🥛 Surprise! Milk contains electrolytes, protein, and carbs that help your body retain water longer than plain water.
106. How does dehydration change your sleep quality?
A) Improves REM cycles
B) Makes it harder to fall and stay asleep
C) Has no impact
D) Makes dreams more vivid
B) Makes it harder to fall and stay asleep ✅
😴 Dehydration causes dry mouth, higher heart rate, and muscle cramps — all of which disturb sleep.
89. Which food sneaks in dehydration due to salt content?
A) Pickles
B) Grapes
C) Apples
D) Strawberries
A) Pickles ✅
🧂 Pickles are loaded with sodium — tasty but thirst-making!
101. What percent of your brain is made up of water?
A) 25%
B) 50%
C) 75%
D) 90%
C) 75% ✅
🧠 Your brain is about three-quarters water — even mild dehydration can shrink brain tissue slightly and slow thinking.
43. What can dehydration do to your blood pressure if you stand up too fast?
B) Increase it
C) Keep it stable
D) Raise your body temp
A) Make it drop suddenly ✅
💥 Known as orthostatic hypotension — less fluid volume means your blood can’t reach your brain quickly enough when standing.
72. Which drink makes you more thirsty afterward?
A) Sports drink
B) Soda
C) Milk
D) Smoothie
B) Soda ✅
🥤 Soda’s high sugar and sodium can pull water out of your cells, actually dehydrating you.
64. How does dehydration affect your muscles during workouts?
A) Makes them stronger
B) Reduces flexibility and causes cramps
C) Builds muscle faster
D) Increases power output
💪 Low water and electrolyte imbalance make muscles contract and stiffen painfully.
B) Reduces flexibility and causes cramps ✅
💪 Low water and electrolyte imbalance make muscles contract and stiffen painfully.
105. Which emotion can dehydration amplify the most?
A) Happiness
B) Anger
C) Curiosity
D) Boredom
B) Anger ✅
🔥 Even mild dehydration increases frustration and short temper because the brain struggles to regulate mood chemicals.
41. What happens to your mood when you’re just 1–2% dehydrated?
A) Nothing changes
B) You can feel anxious, moody, or tired
C) You get more energetic
D) You fall asleep faster
B) You can feel anxious, moody, or tired ✅
🧠 Even slight dehydration lowers serotonin and dopamine activity, which affects mood and motivation!
107. What part of your brain senses when you need water?
A) Frontal lobe
B) Hypothalamus
C) Cerebellum
D) Amygdala
B) Hypothalamus ✅
💧 The hypothalamus monitors blood concentration and triggers thirst when water levels drop.
51. Does coffee actually dehydrate you?
A) Yes, completely
B) No — it still counts toward your daily fluids
C) Only if it’s hot
D) Only if it’s black
B) No — it still counts toward your daily fluids ✅
☕ Caffeine is mildly diuretic, but coffee is mostly water — so it still hydrates you overall.
What unusual symptom can dehydration cause in some people?
A) Hiccups
B) Sneezing
C) Nosebleeds
D) Ear ringing
A) Hiccups
💬 Electrolyte imbalance and nerve irritation from dehydration can trigger hiccups!
35. How much water do you lose each day just by breathing?
A) None
B) About half a cup
C) 1–2 cups
D) A full gallon
C) 1–2 cups ✅
💨 Every exhale releases tiny water droplets — especially in dry air or cold weather!
91. Which drink can trick you into feeling hydrated but actually causes water loss?
A) Iced coffee
B) Lemon water
C) Herbal tea
D) Smoothie
A) Iced coffee ✅
☕ Caffeine mildly increases urination — one cup is fine, but many can deplete fluids.
108. How does being dehydrated affect decision-making?
A) You become more impulsive
B) You think faster
C) You become more logical
D) You ignore emotions
A) You become more impulsive ✅
🧠 Dehydration lowers blood flow to the prefrontal cortex — the brain’s control center for judgment and reasoning.
73. What type of food helps your body hold onto water longer?
A) High-protein
B) High-fiber
C) High-sugar
D) High-fat
🌾 Fiber traps water in your intestines and helps regulate digestion — slowing dehydration.
B) High-fiber ✅
🌾 Fiber traps water in your intestines and helps regulate digestion — slowing dehydration.
40. Which of these is an early hidden sign of dehydration?
A) Cold hands
B) Sneezing
C) Cracked nails
D) Blurry dreams
A) Cold hands ✅
🖐️ When fluid levels drop, your body sends more blood to vital organs and less to your hands and feet.
49. What’s one organ that actually stores a lot of your body’s water?
A) Liver
B) Skin
C) Lungs
D) Kidneys
B) Skin ✅
🌊 Your skin holds about 20–30% of the body’s total water — it’s like your body’s built-in reservoir.
36. What does your body use to “measure” hydration levels?
A) Taste buds
B) Osmoreceptors in your brain
C) Kidney size
D) Skin dryness
B) Osmoreceptors in your brain ✅
🧠 Cells in your hypothalamus detect changes in blood concentration and signal thirst.
39. What can dehydration do to your blood sugar?
A) Make it dangerously low
B) Raise it
C) Keep it stable
D) Replace sugar with salt
B) Raise it ✅
💉 With less water, glucose becomes more concentrated in the blood — risky for diabetics!
79. Which of these foods helps your body rehydrate after exercise?
A) French fries
B) Bananas
C) Candy
D) Chips
B) Bananas ✅
🍌 Bananas are packed with potassium — they restore lost electrolytes and balance fluids.
82. Which food surprisingly contains a lot of hidden water?
A) Oatmeal
B) Candy
C) Pretzels
D) Peanut butter
A) Oatmeal ✅
🥣 Oats absorb water during cooking — one serving can hold over ½ cup of water!
71. Which food has the highest water content?
A) yogurt
B) Cucumber
C) Watermelon
D) apple
B) Cucumber ✅
🥒 Cucumbers are about 96% water — even higher than watermelon!
77. Which beverage contains natural electrolytes?
A) Coconut water
B) Energy drink
C) Tea
D) Juice
A) Coconut water ✅
🥥 Coconut water naturally contains potassium and magnesium, great for rehydration!
69. Why might you feel nauseous when dehydrated during sports?
A) Blood flow moves away from the stomach
B) Too much sugar in your blood
C) Muscles push on organs
D) Lungs overheat
A) Blood flow moves away from the stomach ✅
🤢 Your body prioritizes your heart and muscles, reducing blood to digestion — causing nausea.