Question

Asthma is a respiratory disease caused due to
A)Infection of trachea
B)Infection of lungs
C)Bleeding in pleural cavity
D)Spasm in bronchial muscles

Answer 1

Hint: Asthma is termed as a condition in which a person's airways are observed to be narrow and swell and generates extra mucus from its normal concentration. Because of these changes, breathing becomes difficult. This leads in a coughing and whistling sound during breathing. This is responsible for the shortening of breath.

Complete answer:
Asthma is observed to be an allergic reaction of the mast cells in the lungs. The common symptoms of asthma are known to be coughing, wheezing, and chest tightness. Asthma is also termed as bronchial asthma due to spasm of bronchioles or reactive airway disease. An allergic reaction is a type of reaction that is started in our body when any foreign cell gets inside.

The body cells observe these foreign substances or allergens as harmful material. The immune system reacts to these allergens and generates a chemical which is termed as histamine. This chemical leads to allergy symptoms such as inflammation, sneezing and coughing.

A mast cell is referred to as a migrant cell of connective tissues. It is composed of granules that are rich in histamine and heparin. These cells are also termed to be as mastocytes or a labrocyte. These cells are a constitution of the immune and neuroimmune systems.

Hence, the correct answer is option (D)

Note: Various types of irritants and allergens can result in asthma. The allergens can be named pollen, dust mites, mould spores, or particles of cockroach waste. These are controllers for triggering allergies. Anxiety and depression also lead to asthma sometimes.