Year 8 - Human Systems

What is the role of the digestive system in maintaining a human as a functioning multicellular organism?

• Regulating body temperature

• Breaking down food to release energy

• Fighting off infections

• Producing hormones

What are the uses and functions of water in the human body?

• To help with digestion

• To transport nutrients and waste products

• To maintain body temperature

• All of the above

Which nutrient is the body's main source of energy?

• Carbohydrates

• Lipids

• Proteins

• Vitamins

What is the role of major systems in humans?

• A) Break down food
• B) Maintain a functioning multicellular organism
• C) Control the environment
• D) Produce energy

Which of the following is a major component of human diet?

• A) Calcium
• B) Oxygen
• C) Chlorine
• D) Fiber

Why is energy from food important?

• A) To repair the body
• B) To build muscles
• C) To maintain a stable body temperature
• D) To perform physical activities

What is digestion?

• A) Building complex substances from simpler substances
• B) Breaking down food into smaller particles
• C) Absorbing nutrients into the body
• D) Circulating blood throughout the body

Which of the following are components of the digestive system?

• A) Liver
• B) Heart
• C) Lungs
• D) Stomach

What is the role of enzymes in chemical digestion?

• A) To transport nutrients to cells
• B) To break down complex molecules into simpler substances
• C) To regulate body temperature
• D) To generate energy

Which of the following are components of the circulatory system?

• A) Red blood cells
• B) Nerve cells
• C) White blood cells
• D) Platelets