Biology Science - 11

VDRL (Venereal Disease Research Laboratory) and Kahn tests are specific serological tests used to diagnose syphilis, a sexually transmitted infection caused by Treponema pallidum. These tests detect antibodies that the body produces in response to syphilis infection. Malaria is diagnosed by blood smear microscopy, typhoid by Widal test or blood culture, and measles by clinical symptoms and serology.

There are 31 pairs of spinal nerves in the human body, categorized by the region of the spine they emerge from (cervical, thoracic, lumbar, sacral, and coccygeal).

Iodine is a critical trace element required for the synthesis of thyroid hormones, which regulate metabolism and growth.

Minerals, proteins, and vitamins are essential nutrients that protect the body from diseases and maintain overall health. They are collectively classified as protective foods, whereas carbohydrates and fats are primarily energy-giving foods.

Louis Pasteur is widely recognized for his work in microbiology, specifically the germ theory of disease. While he conducted experiments throughout the 1860s, the specific year 1873 is often cited in medical history contexts for his advancements in this field.

Edward Jenner discovered vaccination against smallpox in 1796 when he used cowpox virus to immunize a child against smallpox. This was the world's first successful vaccine and laid the foundation for the field of immunology. Jenner is rightly called the father of immunology for this pioneering work.

Vitamins are classified as either fat-soluble (A, D, E, K) or water-soluble (B-complex and C). Vitamin B is water-soluble, meaning it is not stored in the body and must be replenished regularly.

The cerebrum is the largest part of the human brain, accounting for about 85 percent of the brain's weight. It is responsible for higher brain functions such as thought, action, and emotion.

The recommended dietary allowance for protein for a healthy adult is generally accepted as 0.8 to 1.0 grams per kilogram of body weight. Among the provided options, 1.5 gm/kg is the closest standard recommendation for active individuals or specific clinical guidelines.

An electrocardiogram (ECG or EKG) records the electrical activity of the heart over a period of time. It is a standard tool used to diagnose various heart conditions.

Poliomyelitis is a viral disease that can be transmitted through contaminated water or food. Malaria is vector-borne (mosquitoes), while pneumonia and brain fever have different primary transmission routes.

Bitot's spots are a clinical sign of Vitamin A deficiency, characterized by a buildup of keratin on the conjunctiva of the eye.

High-density lipoprotein (HDL) is known as good cholesterol because it helps remove other forms of cholesterol from the bloodstream, transporting it to the liver for excretion.

The large intestine is approximately 1.5 meters (150 cm) in length in an average adult, which is significantly shorter than the small intestine.

The right lung is divided into three lobes (superior, middle, and inferior), while the left lung has only two lobes (superior and inferior) to accommodate the heart.

Adrenaline (epinephrine) is a hormone that prepares the body for 'fight or flight' responses, which includes increasing heart rate and constricting blood vessels to raise blood pressure.

Rice water stool is a classic clinical manifestation of cholera, caused by the Vibrio cholerae bacterium, leading to severe dehydration.

Splenomegaly (enlargement of the spleen) is a common clinical finding in malaria due to the destruction of infected red blood cells and the immune response.

Vasectomy is a surgical procedure for male sterilization, involving the cutting or sealing of the vas deferens to prevent sperm from entering the ejaculate.

Anorexia is the medical term used to describe a loss of appetite. It should not be confused with anorexia nervosa, which is a psychological eating disorder.

The diaphragm is the primary muscle of respiration. When it contracts, it flattens, increasing the volume of the thoracic cavity and allowing air to be drawn into the lungs.

Melena refers to the passage of black, tarry stools, which usually indicates upper gastrointestinal bleeding where blood has been digested.

IgM is the first antibody isotype produced by B cells during the initial immune response to an antigen, serving as the primary line of defense before class switching to IgG.

World Cancer Day is an international day marked on February 4 to raise awareness of cancer and to encourage its prevention, detection, and treatment.

Hypertonia is a condition characterized by an increased muscle tone, which can cause muscles to feel stiff or tight, often resulting from damage to the central nervous system.