Explanation

• Roentgen rays are also called X-rays.
• They are used to detect fractures and bone diseases.
• They pass through soft tissues but not bones clearly.
• Doctors use them in medical imaging (radiology).
• They were discovered by Wilhelm Roentgen.

Last verified on 26-04-2026

Explanation

• Allergy is an abnormal immune response to harmless substances like dust or pollen.
• It occurs when the body reacts excessively to an allergen.
• This reaction involves the immune system producing antibodies.
• Thus, allergy is mainly due to an antigen–antibody reaction.

Last verified on 23-04-2026

Explanation

Explanation

• Claustrophobia is the fear of enclosed or confined spaces.
• It is classified as an anxiety disorder.
• People with claustrophobia may panic in elevators, small rooms, or windowless spaces.
• Symptoms include shortness of breath, sweating, rapid heartbeat, and anxiety.

Last verified on 02-04-2026

Explanation

• Asthma is a chronic respiratory disease affecting the airways of the lungs.
• It causes narrowing and inflammation of the air passages, leading to difficulty in breathing.
• Common symptoms include wheezing, coughing, chest tightness, and shortness of breath.

Last verified on 02-04-2026