🟢 Objective signs are measurable or observable by healthcare providers.

🟢 Fever can be quantified using a thermometer, making it a true sign.

🟢 Subjective symptoms (like headache, nausea, fatigue) depend on patient self-report.

🟢 Fever reflects underlying inflammatory or infectious processes, which are observable.

🟢 Objective signs help guide diagnosis and monitoring of disease progression.

🟣 Air pollution introduces carcinogenic chemicals that damage lung tissue.

🟣 Exposure to second-hand smoke and environmental toxins increases lung cancer risk.

🟣 Long-term exposure to polluted air contributes to chronic inflammation, which predisposes to cancer.

🟣 Other listed options (BRCA1, sunburn, high altitude) are linked to different conditions, not lung cancer.

🟣 Reducing exposure to airborne carcinogens is a proven prevention method.

🟢 Hypoxia reduces ATP production, which is essential for the sodium-potassium pump.

🟢 Without ATP, sodium accumulates inside the cell, pulling water in by osmosis.

🟢 The resulting cellular swelling stretches and weakens the cell membrane.

🟢 Eventually, the swollen cell undergoes membrane rupture, releasing contents.

🟢 This process explains why hypoxia is a leading cause of irreversible cell injury.

🔵 Chronic diseases often start with slow onset and mild symptoms.

🔵 They can last months to years, unlike acute diseases which resolve quickly.

🔵 Examples include diabetes, hypertension, COPD.

🔵 They may worsen over time with periods of remission and exacerbation.

🔵 Management focuses on long-term care rather than cure.

Muscle weakness

🟠 Tumors can cause cachexia, leading to muscle breakdown.

🟠 Nutrients are diverted to cancer cell growth, leaving body tissues malnourished.

🟠 This results in progressive weakness in clients with malignancy.

Severe fatigue

🟠 Fatigue is the most common systemic symptom of cancer.

🟠 It is caused by anemia, cytokine release, and metabolic demands of the tumor.

🟠 Fatigue often persists even after rest, distinguishing it from normal tiredness.

🟠Infections

🟠 Tumors weaken the immune system either directly or by treatment effects.

🟠 Bone marrow suppression reduces WBC counts, increasing infection risk.

🟠 Opportunistic infections are common due to immunosuppression.

🟠Intestinal obstruction It is a local effect, not systemic.

🟠Ulcerations These are local tissue effects, not systemic.

🟣 ADH is secreted by the posterior pituitary during stress.

🟣 Its main role is to promote water reabsorption in the kidneys.

🟣 This leads to increased blood volume and blood pressure.

🟣 Water retention helps maintain perfusion in times of stress.

🟣 Other options (serum proteins, lymphocytes, wound healing) are not direct ADH effects.

Temperature

✅ Extreme heat can cause heat stroke, burns, dehydration.

✅ Extreme cold can cause frostbite, hypothermia.

✅ Both alter body homeostasis.

Noise

✅ Long-term exposure leads to hearing loss and stress.

✅ Occupational noise is a recognized hazard.

✅ Noise pollution affects sleep and mental health.

Mold

✅ Mold produces spores that cause allergic reactions and respiratory illness.

✅ Long-term exposure linked to asthma and chronic lung disease.

✅ Indoor air quality is a major determinant of health.

✅Parasites and viruses are biological agents, not physical environmental agents.