Questions & Answers
Browse all 25 questions from the
Existentialism and Biological Reality study set below.
Each question shows the correct answer — select a study format above to practice interactively.
1
Which vital organ in the human body is primarily responsible for pumping oxygenated blood, a biological necessity for human existence?
-
A
Lungs
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B
Heart
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C
Liver
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D
Kidneys
2
What is the primary structural framework of the human body that provides support for physical existence?
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A
Muscular system
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B
Skeletal system
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C
Nervous system
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D
Endocrine system
3
Which organ is the central control system for human consciousness and cognitive function?
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A
Stomach
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B
Brain
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C
Pancreas
-
D
Spleen
4
Human existence requires the intake of oxygen. Which organ system is primarily responsible for gas exchange?
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A
Respiratory system
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B
Digestive system
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C
Urinary system
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D
Reproductive system
5
What substance makes up approximately 60% of an average adult human's total body weight, essential for life?
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A
Fat
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B
Protein
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C
Water
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D
Bone
6
Which cells in the human body are responsible for carrying oxygen from the lungs to the tissues?
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A
White blood cells
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B
Red blood cells
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C
Platelets
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D
Neurons
7
What is the largest organ of the human body, providing a physical barrier between the individual and the world?
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A
Liver
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B
Skin
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C
Lungs
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D
Intestines
8
Which part of the human eye is responsible for focusing light onto the retina, allowing perception of the environment?
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A
Iris
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B
Lens
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C
Cornea
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D
Pupil
9
What is the name of the process by which human cells convert nutrients into energy to sustain life?
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A
Photosynthesis
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B
Respiration
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C
Metabolism
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D
Digestion
10
Which chemical element is the primary component of all known organic matter, including the human body?
-
A
Oxygen
-
B
Carbon
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C
Nitrogen
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D
Hydrogen
11
What system of the body is responsible for producing hormones that regulate human growth and development?
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A
Endocrine system
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B
Digestive system
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C
Skeletal system
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D
Integumentary system
12
Which organ is responsible for filtering waste products from the blood to maintain homeostatic balance?
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A
Kidneys
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B
Heart
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C
Lungs
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D
Brain
13
What is the primary fuel source for the human brain's cognitive activities?
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A
Glucose
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B
Protein
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C
Fiber
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D
Vitamin C
14
How many chambers are contained within the standard healthy human heart?
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A
Two
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B
Three
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C
Four
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D
Five
15
Which type of muscle is responsible for the involuntary movement of the human heart?
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A
Skeletal muscle
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B
Smooth muscle
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C
Cardiac muscle
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D
Striated muscle
16
What is the average resting heart rate for a healthy adult in beats per minute?
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A
20-40
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B
60-100
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C
120-150
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D
180-200
17
Which nutrient is essential for the structure and repair of human muscle tissue?
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A
Fat
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B
Protein
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C
Starch
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D
Sugar
18
What is the primary function of the human large intestine?
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A
Absorption of nutrients
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B
Absorption of water
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C
Production of bile
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D
Filtration of blood
19
Which gland in the human body is often referred to as the 'master gland' because it regulates other endocrine functions?
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A
Thyroid
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B
Pituitary
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C
Adrenal
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D
Pineal
20
What is the biological term for the maintenance of a stable internal environment in the human body?
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A
Homeostasis
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B
Evolution
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C
Metabolism
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D
Respiration
21
Which substance is produced by the liver and stored in the gallbladder to assist in fat digestion?
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A
Insulin
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B
Bile
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C
Gastrin
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D
Pepsin
22
Approximately how many bones are in a typical adult human skeleton?
23
What is the primary purpose of the human sense of touch, mediated by receptors in the skin?
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A
Detecting movement
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B
Sensing temperature and pressure
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C
Processing light
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D
Hearing vibrations
24
Which nerve carries visual information from the retina to the brain?
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A
Auditory nerve
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B
Optic nerve
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C
Olfactory nerve
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D
Vagus nerve
25
What is the normal human body temperature in degrees Celsius?
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A
30.5°C
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B
37.0°C
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C
40.2°C
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D
42.5°C
