Human Body Quiz

How do proper brushing and flossing help protect the crown and root of a tooth?

1. By removing food particles and plaque that can cause cavities and gum disease.
2. By making the teeth grow stronger and larger over time.
3. By changing the shape of the teeth to prevent damage.
4. By whitening the teeth to keep them looking clean.

Answer: (a) By removing food particles and plaque that can cause cavities and gum disease.

What happens if the food pipe (oesophagus) is blocked or damaged?

1. The stomach will stop producing digestive juices.
2. The body will produce more saliva to help break down the food.
3. The body might not get the nutrients it needs from food.
4. Food will skip the stomach and go directly to the small intestine.

Answer: (c) The body might not get the nutrients it needs from food.

Riya avoids eating spicy junk food and sugary drinks and prefers home-cooked meals with vegetables. She also exercises for 20 minutes daily. Which of the following best explains how these habits support her digestion and excretion?

1. They reduce strain on her digestive system and improve nutrient absorption.
2. Skipping vegetables is fine if she exercises.
3. Avoiding exercise helps the body rest and improves digestion.
4. They help her eat more food by speeding up digestion.

Answer: (a) They reduce strain on her digestive system and improve nutrient absorption.

A graph shows the amount of food absorbed in different parts of the digestive system. The part with the highest food absorption is indicated on the graph. Which of the following is likely responsible for the highest absorption?

1. Z, which may be the large intestine
2. X, which may be the small intestine
3. Y, which may be the small intestine
4. P, which may be the large intestine

Answer: (b) X, which may be the small intestine

Mia's little brother has only 20 teeth, while Mia has 28 teeth. Mia’s dentist explains that she will get 4 more teeth when she grows older, and they will appear at the very back of her mouth. What are the additional teeth called, and why are they important for adults?

1. Premolars; they replace the baby teeth.
2. Wisdom teeth; they help in chewing tough food.
3. Molars; they grind food effectively for better digestion.
4. Canines; they make the jaw stronger.

Answer: (b) Wisdom teeth; they help in chewing tough food.

The table below shows the time required for digestion based on meal size and composition. If a student wants to have a meal before bedtime to avoid discomfort during sleep, which choice is the best and why? Meal Type Meal Size Digestion Time (hours) Balanced meal (protein, fiber, fats) Small 3.5 High-fat meal Large 7 Fiber-rich meal Medium 4

1. A large high-fat meal because it provides energy through the night.
2. A medium fibre-rich meal because it digests faster than a large meal.
3. A large balanced meal because it keeps the stomach full overnight.
4. A small balanced meal because it digests quickly and provides nutrients.

Answer: (d) A small balanced meal because it digests quickly and provides nutrients.

Why are the rings of cartilage in the windpipe (trachea) important for the function of the respiratory system?

1. They allow the windpipe to expand and contract with the movement of air.
2. They support the windpipe to keep it open, ensuring air can flow freely to the lungs.
3. They help trap particles in the air to protect the lungs from dust.
4. They produce mucus to keep the airways moist and prevent infection.

Answer: (b) They support the windpipe to keep it open, ensuring air can flow freely to the lungs.

You have three mystery foods labelled A, B, and C. Each food affects the digestive system in a different way. Based on the following observations, identify the food and its digestive function correctly: A. Food A provides a quick source of energy and is easily broken down in the stomach. B. Food B helps in the absorption of nutrients by providing fibre to aid digestion. C. Food C is rich in protein and helps in building and repairing tissues after digestion.

1. A: Rice, B: Bread, C: Egg
2. A: Bread, B: Lentil, C: Fish
3. A: Potato, B: Broccoli, C: Lentil
4. A: Rice, B: Cabbage, C: Chicken

Answer: (d) A: Rice, B: Cabbage, C: Chicken

Consider the following passage and answer the following question: The Incredible Journey of Food in the Human Body The digestive system is an amazing process that turns food into energy and nutrients to keep us healthy. It all starts in the mouth, where teeth crush the food and saliva mixes with it. The saliva has substances that begin breaking the food down. Next, the food travels down the oesophagus to the stomach. The stomach mixes the food with juices that help break it down further. Then, the food moves to the small intestine, where tiny structures called villi absorb nutrients into the bloodstream. These nutrients give the body energy and help it grow and repair. Finally, any leftover waste moves to the large intestine, where most of the water is absorbed. The remaining solid waste is stored in the rectum and then eliminated through the anus. This whole process helps the body get the nutrients it needs to stay healthy. What might happen if the large intestine stopped absorbing water?

1. The body would be unable to absorb nutrients.
2. Solid waste would not form properly.
3. Digestive juices would stop being produced.
4. Nutrients would be absorbed from the stomach.

Answer: (b) Solid waste would not form properly.

Consider the following passage and answer the following question: The Incredible Journey of Food in the Human Body The digestive system is an amazing process that turns food into energy and nutrients to keep us healthy. It all starts in the mouth, where teeth crush the food and saliva mixes with it. The saliva has substances that begin breaking the food down. Next, the food travels down the oesophagus to the stomach. The stomach mixes the food with juices that help break it down further. Then, the food moves to the small intestine, where tiny structures called villi absorb nutrients into the bloodstream. These nutrients give the body energy and help it grow and repair. Finally, any leftover waste moves to the large intestine, where most of the water is absorbed. The remaining solid waste is stored in the rectum and then eliminated through the anus. This whole process helps the body get the nutrients it needs to stay healthy. If the rectum could not store waste, how would the digestive system be affected?

1. Waste would be eliminated from the body too quickly, leading to dehydration
2. The body would not be able to absorb nutrients properly
3. Solid waste would not be stored and processed for elimination
4. More water would be absorbed from the food

Answer: (c) Solid waste would not be stored and processed for elimination