Explanation

Explanation

For a cut hand, both histamine and interleukin-1 (IL-1) cause inflammation.

Interleukin-2 (IL-2), while important for immune regulation, is not a primary or direct cause of the initial inflammatory response to an injury. 

Histamine

• Released immediately by mast cells, which are a type of white blood cell located under the skin and near blood vessels.
• Acts quickly to increase blood flow to the injured area, causing the redness and swelling associated with inflammation.

Interleukin-1 (IL-1)

• A "master cytokine" for inflammation that is released by white blood cells like macrophages and monocytes.
• The IL-1α precursor is stored in skin cells (keratinocytes) and released rapidly upon injury.

Interleukin-2 (IL-2)

• A cytokine that promotes the growth and proliferation of T-cells and other lymphocytes
• It is part of the later adaptive immune response.
• IL-2 deficiency is linked to autoimmune diseases because it helps to maintain immune tolerance by promoting regulatory T-cells.

Explanation

Explanation

The medical condition characterized by the complete absence of sperm in the semen is called azoospermia. 

Explanation

Explanation

Hypertension (high blood pressure) is a non-viral disease.

Whereas HIV/Aids, Measles, and Influenza are all viral diseases.

Explanation

Communicable diseases are those that can be spread from person to person.

Tuberculosis (TB) is a bacterial infection that can be transmitted through the air when an infected person coughs or sneezes

This makes it a communicable disease. 

Diabetes:

Diabetes is a metabolic disorder that is not spreadable from person to person. 

Hypertension:

High blood pressure (hypertension) is a cardiovascular condition that is also not communicable. 

Asthma:

Asthma is a chronic respiratory condition characterized by inflammation and narrowing of the airways. 

Explanation

Azoospermia is the medical term for the complete absence of sperm in a man's ejaculate. 

Common causes include hormonal imbalances, genetic conditions, chemotherapy, anatomical abnormalities, and certain recreational drug use.

Explanation

AIDS is caused by HIV.

It spreads through infected needles, sexual contact, and unsafe practices.

It is not transmitted by casual contact like touching or sharing food.

Explanation

Lack of insulin causes diabetes.

Diabetes is a condition that happens when your blood sugar (glucose) is too high.

It develops when your pancreas doesn't make enough insulin.