Human Lungs – Important Points

-
 Human Lungs  Lungs are the primary organ of the respiratory system, located in the thoracic cavity. Humans have two lungs: Right lung (3 lobes) and Left lung (2 lobes) — left is smaller to accommodate the heart. Covered by a double-layered membrane called Pleura (visceral & parietal), with pleural fluid reducing friction. Main function: Gas exchange – oxygen intake and carbon dioxide removal. Air pathway: Nose → Pharynx → Larynx → Trachea → Bronchi → Bronchioles → Alveoli. Alveoli are tiny air sacs (~300 million) where actual gas exchange occurs via diffusion. Alveolar walls are lined with a single layer of squamous epithelium for fast diffusion. Surfactant (produced by Type II alveolar cells) reduces surface tension, preventing alveolar collapse. Lungs are not muscular; breathing is driven by diaphragm and intercostal muscles. Diaphragm contraction → lung volume increases → inhalation (negative pressure). Diaphragm relaxation → lung volume decreases → exhalation. Right l...

Nursing MCQs: 50 Most Important Questions

-
NURSING – 50 MOST IMPORTANT MCQs

1. The normal body temperature is:
A) 35°C
B) 36°C
C) 37°C
D) 38°C

2. Normal pulse rate in adults is:
A) 40–60/min
B) 60–100/min
C) 100–120/min
D) 120–140/min

3. Normal respiratory rate in adults is:
A) 8–10/min
B) 12–20/min
C) 25–30/min
D) 30–40/min

4. Normal blood pressure is:
A) 90/60 mmHg
B) 100/70 mmHg
C) 120/80 mmHg
D) 140/100 mmHg

5. The universal donor blood group is:
A) A
B) B
C) AB
D) O

6. Universal recipient blood group is:
A) O
B) A
C) B
D) AB

7. The largest gland in the human body is:
A) Pancreas
B) Liver
C) Thyroid
D) Spleen

8. The study of nursing is called:
A) Neurology
B) Cardiology
C) Nursing Science
D) Oncology

9. The founder of modern nursing is:
A) Clara Barton
B) Florence Nightingale
C) Virginia Henderson
D) Dorothea Orem

10. The normal pH of blood is:
A) 6.8–7.0
B) 7.35–7.45
C) 7.5–8.0
D) 8.1–8.5

11. The largest bone in the body is:
A) Tibia
B) Humerus
C) Femur
D) Fibula

12. The smallest bone is:
A) Stapes
B) Malleus
C) Incus
D) Radius

13. The functional unit of kidney is:
A) Neuron
B) Nephron
C) Alveolus
D) Villus

14. The functional unit of nervous system is:
A) Osteon
B) Nephron
C) Neuron
D) Alveoli

15. Vitamin D deficiency causes:
A) Scurvy
B) Beriberi
C) Rickets
D) Pellagra

16. Vitamin C deficiency causes:
A) Rickets
B) Scurvy
C) Beriberi
D) Anemia

17. The normal oxygen saturation is:
A) 70–80%
B) 80–90%
C) 95–100%
D) 50–60%

18. The instrument used to measure BP is:
A) Stethoscope
B) Sphygmomanometer
C) Thermometer
D) ECG

19. The instrument used to measure temperature is:
A) Thermometer
B) Spirometer
C) ECG
D) X-ray

20. The pulse is commonly checked at:
A) Femoral artery
B) Radial artery
C) Carotid vein
D) Jugular vein

21. BCG vaccine protects against:
A) Polio
B) Tuberculosis
C) Measles
D) Hepatitis

22. OPV is used against:
A) Tetanus
B) Polio
C) Rabies
D) Diphtheria

23. DPT vaccine protects against:
A) 2 diseases
B) 3 diseases
C) 4 diseases
D) 5 diseases

24. The largest organ of the body is:
A) Liver
B) Brain
C) Skin
D) Lung

25. The liquid part of blood is:
A) Serum
B) Plasma
C) Lymph
D) Platelets

26. RBCs are produced in:
A) Liver
B) Spleen
C) Bone marrow
D) Kidney

27. Hemoglobin contains:
A) Calcium
B) Iron
C) Sodium
D) Potassium

28. The normal hemoglobin in adult male is approximately:
A) 8–10 g/dL
B) 10–12 g/dL
C) 13–18 g/dL
D) 20–22 g/dL

29. The clotting cells are:
A) RBCs
B) WBCs
C) Platelets
D) Plasma

30. WBCs help in:
A) Digestion
B) Immunity
C) Hearing
D) Vision

31. The normal gestation period is:
A) 28 weeks
B) 32 weeks
C) 40 weeks
D) 52 weeks

32. A newborn baby normally has:
A) 20 teeth
B) 10 teeth
C) No teeth
D) 32 teeth

33. The first milk is called:
A) Plasma
B) Colostrum
C) Serum
D) Lactose

34. Colostrum is rich in:
A) Fat
B) Antibodies
C) Sugar
D) Water

35. The largest artery is:
A) Pulmonary artery
B) Aorta
C) Coronary artery
D) Femoral artery

36. The chamber pumping oxygenated blood is:
A) Right atrium
B) Right ventricle
C) Left ventricle
D) Left atrium

37. Normal urine color is:
A) Red
B) Black
C) Pale yellow
D) Blue

38. Insulin is secreted by:
A) Liver
B) Pancreas
C) Kidney
D) Thyroid

39. Diabetes mellitus is related to:
A) Thyroxine
B) Insulin
C) Adrenaline
D) Estrogen

40. The normal fasting blood sugar is approximately:
A) 70–100 mg/dL
B) 150–200 mg/dL
C) 250–300 mg/dL
D) 350–400 mg/dL

41. The study of tissues is called:
A) Histology
B) Cytology
C) Physiology
D) Pathology

42. The study of cells is called:
A) Cytology
B) Ecology
C) Genetics
D) Anatomy

43. The largest lobe of brain is:
A) Temporal
B) Parietal
C) Frontal
D) Occipital

44. Cerebrospinal fluid surrounds:
A) Heart
B) Liver
C) Brain and spinal cord
D) Kidney

45. The kneecap is called:
A) Femur
B) Tibia
C) Patella
D) Fibula

46. The strongest tendon is:
A) Patellar tendon
B) Achilles tendon
C) Biceps tendon
D) Triceps tendon

47. The normal adult teeth are:
A) 28
B) 30
C) 32
D) 34

48. The largest muscle is:
A) Deltoid
B) Sartorius
C) Gluteus Maximus
D) Biceps

49. The voice box is:
A) Pharynx
B) Larynx
C) Trachea
D) Bronchus

50. The windpipe is:
A) Larynx
B) Esophagus
C) Trachea
D) Pharynx

ANSWER KEY (1–50)

1-C
2-B
3-B
4-C
5-D
6-D
7-B
8-C
9-B
10-B
11-C
12-A
13-B
14-C
15-C
16-B
17-C
18-B
19-A
20-B
21-B
22-B
23-B
24-C
25-B
26-C
27-B
28-C
29-C
30-B
31-C
32-C
33-B
34-B
35-B
36-C
37-C
38-B
39-B
40-A
41-A
42-A
43-C
44-C
45-C
46-B
47-C
48-C
49-B
50-C

© JK StudyPulse

Popular posts from this blog

FATTY LIVER – INTERESTING FACTS

-
 FATTY LIVER  • Fatty liver occurs when excess fat accumulates in liver cells. • It is also known as hepatic steatosis. • The liver is the largest gland in the human body. • A healthy liver contains very little fat. • Fatty liver can occur in both adults and children. • Obesity is a major risk factor for fatty liver. • Type 2 diabetes increases the risk of fatty liver. • High cholesterol levels may contribute to fatty liver. • Excessive alcohol consumption can cause fatty liver. • Non-alcoholic fatty liver disease (NAFLD) occurs without heavy alcohol use. • Fatty liver is often called a "silent disease." • Many people have no symptoms in the early stages. • Fatigue may occur in some patients. • Mild pain or discomfort in the upper right abdomen may occur. • Ultrasound is commonly used to detect fatty liver. • Blood tests can help assess liver function. • Weight loss can reduce liver fat. • Regular exercise helps improve liver health. • A balanced diet is important for managin...
Read more

50 Nursing Exam MCQs — Complete Practice Set for All Competitive Nursing Exams

-
50 Nursing MCQs with Answers ━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 1. The basic structural and functional unit of the human body is: A) Tissue B) Organ C) Cell ✅ D) System 2. Which part of the cell controls all cellular activities? A) Mitochondria B) Nucleus ✅ C) Ribosome D) Lysosome 3. The process by which cells divide to produce two identical daughter cells is called: A) Meiosis B) Mitosis ✅ C) Osmosis D) Diffusion 4. Normal body temperature in adults is: A) 36.0°C B) 37.0°C ✅ C) 38.0°C D) 39.0°C 5. Which blood type is known as the "universal donor"? A) A B) B C) AB D) O ✅ 6. The normal adult heart rate (pulse) at rest is: A) 40–60 bpm B) 60–100 bpm ✅ C) 100–120 bpm D) 120–140 bpm 7. Which organ produces insulin? A) Liver B) Kidney C) Pancreas ✅ D) Spleen 8. The largest organ of the human body is: A) Liver B) Lungs C) Skin ✅ D) Brain 9. Normal respiratory rate in adults is: A) 8–10 breaths/min B) 12–20 breaths/min ✅ C) 20–30 breaths/min D) 30–40 breaths/min 10. Which chamber of the ...
Read more