- Which process involves the intake of oxygen and the release of carbon dioxide in cells?
- A) Photosynthesis
- B) Respiration
- C) Digestion
- D) Excretion
- What is the primary function of the digestive system?
- A) To absorb nutrients
- B) To circulate blood
- C) To produce hormones
- D) To exchange gases
- In which organ does the majority of nutrient absorption occur?
- A) Stomach
- B) Large intestine
- C) Small intestine
- D) Liver
- What is the role of the mitochondria in cellular respiration?
- A) To produce glucose
- B) To generate ATP
- C) To store genetic information
- D) To transport substances
- Which part of the plant is primarily responsible for photosynthesis?
- A) Roots
- B) Stems
- C) Flowers
- D) Leaves
- What is the main function of the circulatory system?
- A) To digest food
- B) To transport nutrients and oxygen
- C) To regulate body temperature
- D) To remove waste
- Which organ filters blood and produces urine?
- A) Heart
- B) Liver
- C) Lungs
- D) Kidneys
- Which type of respiration occurs without oxygen?
- A) Aerobic respiration
- B) Anaerobic respiration
- C) Cellular respiration
- D) Photosynthesis
- What is the purpose of the process of excretion?
- A) To remove waste products from the body
- B) To produce energy
- C) To absorb nutrients
- D) To transport hormones
- Where does the exchange of gases take place in the human body?
- A) Stomach
- B) Lungs
- C) Liver
- D) Heart
- Which organ is responsible for producing bile?
- A) Stomach
- B) Pancreas
- C) Liver
- D) Kidney
- What is the function of the alveoli in the lungs?
- A) To absorb nutrients
- B) To exchange gases
- C) To pump blood
- D) To filter waste
- Which process involves the breakdown of food into smaller molecules?
- A) Respiration
- B) Digestion
- C) Circulation
- D) Excretion
- In which part of the plant does water uptake primarily occur?
- A) Leaves
- B) Flowers
- C) Roots
- D) Stems
- Which system regulates body functions through hormones?
- A) Digestive system
- B) Circulatory system
- C) Nervous system
- D) Endocrine system
- What is the primary role of red blood cells?
- A) To fight infections
- B) To transport oxygen
- C) To produce hormones
- D) To digest food
- Which process converts glucose and oxygen into carbon dioxide and water while releasing energy?
- A) Photosynthesis
- B) Cellular respiration
- C) Fermentation
- D) Digestion
- Where does the majority of digestion occur in the human digestive system?
- A) Mouth
- B) Small intestine
- C) Large intestine
- D) Esophagus
- Which part of the brain is responsible for controlling involuntary actions like heartbeat?
- A) Cerebrum
- B) Cerebellum
- C) Medulla oblongata
- D) Thalamus
- What is the main function of the xylem in plants?
- A) To transport water and minerals
- B) To transport food
- C) To absorb sunlight
- D) To produce seeds
- Which structure in the plant cell is involved in the process of photosynthesis?
- A) Mitochondria
- B) Chloroplast
- C) Nucleus
- D) Ribosome
- What is the role of the pancreas in digestion?
- A) To produce bile
- B) To secrete digestive enzymes
- C) To absorb nutrients
- D) To filter blood
- Which organ system includes the heart and blood vessels?
- A) Digestive system
- B) Respiratory system
- C) Circulatory system
- D) Nervous system
- What is the primary purpose of the phloem in plants?
- A) To transport water
- B) To transport nutrients
- C) To transport food (sugars)
- D) To absorb water
- What is the main function of the large intestine?
- A) To absorb water and electrolytes
- B) To digest proteins
- C) To absorb nutrients
- D) To filter blood
- Which organ helps regulate blood sugar levels?
- A) Liver
- B) Pancreas
- C) Kidney
- D) Stomach
- Where does the majority of gas exchange occur in the lungs?
- A) Trachea
- B) Bronchi
- C) Alveoli
- D) Diaphragm
- What is the primary role of the respiratory system?
- A) To circulate blood
- B) To exchange gases
- C) To digest food
- D) To regulate body temperature
- Which organ is responsible for filtering and reabsorbing water from urine?
- A) Bladder
- B) Kidney
- C) Liver
- D) Intestine
- What type of respiration takes place in yeast and some bacteria?
- A) Aerobic respiration
- B) Anaerobic respiration
- C) Cellular respiration
- D) Photosynthesis
- What is the main function of the digestive enzyme amylase?
- A) To break down proteins
- B) To break down carbohydrates
- C) To break down fats
- D) To neutralize acids
- Which process involves the elimination of metabolic waste products from the body?
- A) Digestion
- B) Respiration
- C) Excretion
- D) Circulation
- Which organ is primarily responsible for the synthesis of proteins?
- A) Liver
- B) Stomach
- C) Small intestine
- D) Ribosome
- What is the role of the stomata in plants?
- A) To transport water
- B) To exchange gases
- C) To absorb nutrients
- D) To conduct photosynthesis
- What substance is primarily absorbed by the small intestine?
- A) Water
- B) Nutrients
- C) Oxygen
- D) Carbon dioxide
- Which organ produces insulin?
- A) Liver
- B) Pancreas
- C) Kidney
- D) Heart
- What does the term “homeostasis” refer to?
- A) The breakdown of food
- B) The maintenance of stable internal conditions
- C) The process of respiration
- D) The production of energy
- Which part of the plant is responsible for absorbing minerals from the soil?
- A) Leaves
- B) Stems
- C) Roots
- D) Flowers
- What is the main function of the diaphragm in the respiratory system?
- A) To filter air
- B) To help in the expansion and contraction of the lungs
- C) To exchange gases
- D) To transport oxygen
- What is the primary role of the small intestine in digestion?
- A) To absorb nutrients
- B) To produce bile
- C) To store waste
- D) To digest proteins
Answer Key
- B) Respiration
- A) To absorb nutrients
- C) Small intestine
- B) To generate ATP
- D) Leaves
- B) To transport nutrients and oxygen
- D) Kidneys
- B) Anaerobic respiration
- A) To remove waste products from the body
- B) Lungs
- C) Liver
- B) To exchange gases
- B) Digestion
- C) Roots
- D) Endocrine system
- B) To transport oxygen
- B) Cellular respiration
- B) Small intestine
- C) Medulla oblongata
- A) To transport water and minerals
- B) Chloroplast
- B) To secrete digestive enzymes
- C) Circulatory system
- C) To transport food (sugars)
- A) To absorb water and electrolytes
- B) Pancreas
- C) Alveoli
- B) To exchange gases
- B) Kidney
- B) Anaerobic respiration
- B) To break down carbohydrates
- C) Excretion
- D) Ribosome
- B) To exchange gases
- B) Nutrients
- B) Pancreas
- B) The maintenance of stable internal conditions
- C) Roots
- B) To help in the expansion and contraction of the lungs
- A) To absorb nutrients