Cell basics and human body systems digestive respiratory circulatory. - Question Bank

1. The process by which organisms maintain a stable internal environment is called:
A) Metabolism
B) Homeostasis
C) Photosynthesis
D) Osmosis
2. Which substance is absorbed in the large intestine?
A) Glucose
B) Amino acids
C) Water
D) Fats
3. What is the main function of white blood cells?
A) Transporting oxygen
B) Clotting blood
C) Fighting infection and disease
D) Carrying nutrients
4. Which part of the cell is responsible for modifying, sorting, and packaging proteins and lipids for secretion or delivery to other organelles?
A) Ribosome
B) Lysosome
C) Golgi apparatus
D) Vacuole
5. What is the primary role of the left ventricle?
A) To receive deoxygenated blood from the body
B) To pump deoxygenated blood to the lungs
C) To receive oxygenated blood from the lungs
D) To pump oxygenated blood to the rest of the body
6. The exchange of gases in the lungs occurs between the alveoli and the:
A) Arteries
B) Veins
C) Capillaries
D) Bronchioles
7. Which of the following is NOT a component of blood?
A) Red blood cells
B) Enzymes
C) Plasma
D) Platelets
8. Which of the following is NOT a part of the human respiratory system?
A) Lungs
B) Diaphragm
C) Aorta
D) Trachea
9. Which of the following is NOT a part of the human digestive system?
A) Esophagus
B) Trachea
C) Stomach
D) Small intestine
10. The process of expelling air from the lungs is called:
A) Inspiration
B) Inhalation
C) Expiration
D) Ventilation
11. What is the main waste product removed by the respiratory system?
A) Urea
B) Carbon dioxide
C) Ammonia
D) Lactic acid
12. Which organ stores bile produced by the liver?
A) Pancreas
B) Gallbladder
C) Stomach
D) Duodenum
13. The semi-liquid mixture of partially digested food and digestive juices in the stomach is called:
A) Chyme
B) Bile
C) Bolus
D) Feces
14. What substance is primarily responsible for carrying oxygen in the blood?
A) Hemoglobin
B) Plasma
C) White blood cells
D) Platelets
15. Which chamber of the heart pumps oxygenated blood to the rest of the body?
A) Right atrium
B) Right ventricle
C) Left atrium
D) Left ventricle
16. Which blood vessel carries deoxygenated blood from the right ventricle to the lungs?
A) Aorta
B) Pulmonary vein
C) Pulmonary artery
D) Vena cava
17. The process of taking air into the lungs is called:
A) Exhalation
B) Inspiration
C) Ventilation
D) Respiration
18. What is the main function of the alveoli in the lungs?
A) Warming and humidifying air
B) Producing mucus
C) Facilitating gas exchange
D) Filtering dust particles
19. Which organ filters waste products from the blood and produces urine?
A) Liver
B) Lungs
C) Kidneys
D) Spleen
20. What is the primary function of the epiglottis?
A) To produce sound
B) To prevent food from entering the airway
C) To filter air
D) To absorb oxygen
21. The rhythmic contractions that move food through the digestive tract are called:
A) Peristalsis
B) Segmentation
C) Churning
D) Absorption
22. Which vitamin is synthesized by bacteria in the large intestine and is important for blood clotting?
A) Vitamin C
B) Vitamin D
C) Vitamin K
D) Vitamin A
23. The process by which food is broken down into simpler substances that can be absorbed by the body is called:
A) Respiration
B) Circulation
C) Digestion
D) Excretion
24. Which component of blood is responsible for clotting?
A) Red blood cells
B) White blood cells
C) Plasma
D) Platelets (Thrombocytes)
25. What are the tiny blood vessels where the exchange of oxygen, carbon dioxide, nutrients, and waste products occurs between blood and tissues?
A) Arterioles
B) Capillaries
C) Venules
D) Lymphatics
26. Which type of blood vessel carries blood away from the heart?
A) Vein
B) Capillary
C) Artery
D) Venule
27. What is the largest artery in the human body, carrying oxygenated blood from the left ventricle?
A) Pulmonary artery
B) Aorta
C) Coronary artery
D) Carotid artery
28. Which chamber of the heart receives deoxygenated blood from the body?
A) Left atrium
B) Left ventricle
C) Right atrium
D) Right ventricle
29. What is the main function of the circulatory system?
A) Digestion of food
B) Transport of oxygen, nutrients, hormones, and waste products
C) Protection against pathogens
D) Regulation of body temperature through sweating
30. Which blood component is primarily responsible for transporting oxygen?
A) White blood cells
B) Platelets
C) Plasma
D) Red blood cells (Erythrocytes)
31. What gas is carried from the lungs to the body's tissues by red blood cells?
A) Carbon dioxide
B) Nitrogen
C) Oxygen
D) Hydrogen
32. The windpipe, which carries air to the lungs, is also known as the:
A) Esophagus
B) Bronchus
C) Trachea
D) Lungs
33. What is the flap of cartilage that prevents food from entering the trachea during swallowing?
A) Uvula
B) Tonsil
C) Epiglottis
D) Vocal cord
34. Which part of the respiratory system is also known as the 'voice box'?
A) Pharynx
B) Larynx
C) Trachea
D) Epiglottis
35. What is the main function of the diaphragm?
A) To pump blood
B) To filter waste products
C) To aid in breathing by contracting and relaxing
D) To secrete digestive enzymes
36. Where does the primary gas exchange (oxygen in, carbon dioxide out) occur in the human respiratory system?
A) Trachea
B) Bronchioles
C) Alveoli
D) Larynx
37. The muscular tube connecting the pharynx (throat) to the stomach is called the:
A) Trachea
B) Esophagus
C) Bronchus
D) Diaphragm
38. What is the primary function of the large intestine?
A) Digestion of proteins
B) Absorption of vitamins
C) Absorption of water and electrolytes
D) Production of hormones
39. The pancreas secretes digestive enzymes into which part of the digestive tract?
A) Stomach
B) Duodenum (first part of the small intestine)
C) Esophagus
D) Large intestine
40. Which organ produces bile, which helps in the digestion of fats?
A) Pancreas
B) Gallbladder
C) Liver
D) Stomach
41. What is the main role of the small intestine in digestion?
A) Absorption of water
B) Storage of bile
C) Most chemical digestion and absorption of nutrients
D) Production of digestive enzymes
42. The stomach secretes which strong acid to aid in digestion and kill bacteria?
A) Sulfuric acid
B) Hydrochloric acid
C) Nitric acid
D) Acetic acid
43. Which enzyme, found in saliva, begins the breakdown of starch?
A) Pepsin
B) Trypsin
C) Amylase
D) Lipase
44. In the human digestive system, where does the digestion of carbohydrates primarily begin?
A) Stomach
B) Small intestine
C) Mouth
D) Large intestine
45. What is the jelly-like substance that fills the cell and surrounds the organelles?
A) Nucleoplasm
B) Cytosol
C) Vacuole
D) Mitochondrial matrix
46. Which part of the cell contains the genetic material (DNA) and controls the cell's activities?
A) Cytoplasm
B) Cell wall
C) Nucleus
D) Golgi apparatus
47. What is the primary function of the cell membrane?
A) Protein synthesis
B) Controlling what enters and leaves the cell
C) Storing genetic material
D) Generating energy
48. Which organelle is known as the 'powerhouse' of the cell, responsible for generating most of the cell's supply of adenosine triphosphate (ATP)?
A) Nucleus
B) Ribosome
C) Endoplasmic Reticulum
D) Mitochondrion
49. What is the basic structural and functional unit of all known living organisms?
A) Tissue
B) Organ
C) Cell
D) Molecule
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