Respiration, Circulation and Excretion - One Line Questions
1.
The exchange of gases in the lungs occurs via: —
Diffusion
2.
Which part of the respiratory system filters, warms, and moistens inhaled air? —
Nasal cavity and Trachea
3.
In which blood vessels does gas exchange occur between the blood and the alveoli? —
Capillaries
4.
What are the blood vessels that carry blood towards the heart called? —
Veins
5.
The smallest blood vessels where exchange of substances occurs between blood and tissues are: —
Capillaries
6.
The circulatory system is responsible for: —
Transporting oxygen, nutrients, and waste products
7.
What gas is taken in by the lungs during inhalation? —
Oxygen
8.
What waste product, primarily composed of nitrogen, is excreted by the kidneys? —
Urea
9.
What is the role of the aorta? —
Carries oxygenated blood from the left ventricle to the rest of the body
10.
What is the role of the pulmonary artery? —
Carries deoxygenated blood from the heart to the lungs
11.
The process of breathing is controlled by a respiratory center located in the: —
Medulla oblongata and pons
12.
What is the process of eliminating urine from the body called? —
Micturition
13.
The movement of air into and out of the lungs is called: —
Ventilation
14.
What is the primary function of the respiratory system in humans? —
Exchange of gases (oxygen and carbon dioxide)
15.
The removal of undigested food material from the body is called: —
Egestion
16.
In the nephron, the process of returning useful substances from the filtrate back into the blood is called: —
Reabsorption
17.
What is the condition where blood pressure is consistently higher than normal? —
Hypertension
18.
Where is urine stored before being eliminated from the body? —
Bladder
19.
Which organ produces bile, which aids in digestion and waste removal? —
Liver
20.
Which chamber of the human heart receives deoxygenated blood from the body? —
21.
Which chamber of the human heart pumps deoxygenated blood to the lungs? —
Right ventricle
22.
Which chamber of the human heart receives oxygenated blood from the lungs? —
Left atrium
23.
Which chamber of the human heart pumps oxygenated blood to the rest of the body? —
Left ventricle
24.
Which organ is the main site of excretion in the human urinary system? —
Kidneys
25.
What is the main organ of the circulatory system? —
Heart
26.
What is the functional unit of the kidney responsible for filtering blood? —
Nephron
27.
What gas is released from the lungs during exhalation? —
Carbon dioxide
28.
What is the primary function of white blood cells in the circulatory system? —
Fighting infection
29.
What substance in red blood cells is responsible for transporting oxygen? —
Hemoglobin
30.
The exchange of gases between blood and body tissues occurs in: —
Systemic capillaries
31.
The process by which the kidneys filter blood and remove waste products is called: —
Filtration
32.
What is the fluid part of the blood that transports dissolved substances? —
Plasma
33.
Which of the following is a mechanism of excretion for excess salts and water in the body? —
Urination
34.
What muscular structure is located below the lungs and plays a key role in breathing? —
Diaphragm
35.
Which part of the heart contains oxygenated blood? —
Left atrium and left ventricle
36.
Which valves in the heart prevent the backflow of blood from the ventricles into the atria? —
Atrioventricular valves (Mitral and Tricuspid)
37.
Besides the kidneys, which organ also excretes waste products like carbon dioxide? —
Lungs
38.
The process of blood circulation from the heart to the lungs and back is known as: —
Pulmonary circulation
39.
The process of blood circulation from the heart to the rest of the body and back is known as: —
Systemic circulation
40.
The rhythmic contraction and relaxation of the heart muscle is known as: —
Cardiac cycle
41.
What is the primary role of hemoglobin in respiration? —
To carry oxygen
42.
What is the primary role of the vena cava? —
To carry deoxygenated blood from the body to the right atrium
43.
What is the main function of the ureters? —
To transport urine from the kidneys to the bladder
44.
What is the main function of the urethra? —
To eliminate urine from the body
45.
Which part of the human respiratory system is the main site of gas exchange? —
Alveoli
46.
What is the primary function of the excretory system? —
Removal of metabolic waste products from the body
47.
Which of the following is NOT a function of the circulatory system? —
Production of digestive enzymes
48.
Which of the following is a significant waste product removed by the lungs? —
Carbon dioxide
49.
The skin excretes waste products in the form of: —
Urea and excess salts
50.
The tubes that carry urine from the kidneys to the bladder are called: —
Ureters