Questions & Answers
Browse all 20 questions from the
Human Body and Health Knowledge Quiz study set below.
Each question shows the correct answer — select a study format above to practice interactively.
1
Which organ is responsible for filtering waste products and excess fluid from the blood to produce urine?
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A
Liver
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B
Lungs
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C
Kidneys
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D
Heart
2
What is the primary function of red blood cells in the human body?
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A
Fighting infections
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B
Transporting oxygen
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C
Clotting blood
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D
Digesting food
3
The process by which the body breaks down food into smaller molecules that can be absorbed into the bloodstream is called:
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A
Respiration
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B
Circulation
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C
Digestion
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D
Excretion
4
What is the largest organ of the human body?
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A
Brain
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B
Liver
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C
Skin
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D
Lungs
5
Which hormone is primarily responsible for regulating blood sugar levels?
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A
Thyroxine
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B
Adrenaline
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C
Insulin
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D
Melatonin
6
The skeletal system's main role is to provide structure, protect organs, and:
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A
Produce hormones
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B
Digest food
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C
Store calcium
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D
Generate heat
7
Which part of the brain is mainly responsible for coordinating voluntary movements and balance?
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A
Cerebrum
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B
Cerebellum
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C
Brainstem
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D
Hypothalamus
8
What is the average number of bones in an adult human skeleton?
9
The immune system's function is to protect the body from:
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A
Excess heat
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B
Nutrient deficiency
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C
Pathogens (like bacteria and viruses)
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D
Lack of oxygen
10
Which of the following is a vital mineral for strong bones and teeth?
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A
Iron
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B
Potassium
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C
Calcium
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D
Sodium
11
The main purpose of the lungs is to facilitate:
-
A
Blood circulation
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B
Nutrient absorption
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C
Gas exchange (oxygen and carbon dioxide)
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D
Waste filtration
12
What is the body's primary source of energy?
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A
Proteins
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B
Fats
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C
Vitamins
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D
Carbohydrates
13
Which system is responsible for transporting blood, nutrients, oxygen, and hormones throughout the body?
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A
Respiratory system
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B
Nervous system
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C
Circulatory system
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D
Digestive system
14
The pharynx, larynx, trachea, bronchi, and lungs are all parts of which system?
-
A
Endocrine system
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B
Respiratory system
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C
Muscular system
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D
Excretory system
15
What is the primary function of the liver?
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A
Pumping blood
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B
Producing bile and detoxifying blood
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C
Storing urine
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D
Sending nerve signals
16
Which vitamin is crucial for blood clotting?
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A
Vitamin A
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B
Vitamin C
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C
Vitamin D
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D
Vitamin K
17
The small intestine is the primary site for:
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A
Water absorption
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B
Nutrient absorption
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C
Waste elimination
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D
Oxygen intake
18
What type of tissue makes up muscles and is responsible for movement?
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A
Connective tissue
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B
Nervous tissue
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C
Epithelial tissue
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D
Muscle tissue
19
Which gland produces adrenaline, which is involved in the 'fight or flight' response?
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A
Thyroid gland
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B
Adrenal gland
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C
Pituitary gland
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D
Pancreas
20
The primary component of healthy hair and nails is:
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A
Collagen
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B
Elastin
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C
Keratin
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D
Hemoglobin
