Agniveer GK Questions 2026

The thyroid is a butterfly-shaped gland in the neck, in front of the windpipe, and is the largest of the ductless or endocrine glands; it secretes thyroxine, for which iodine is essential, and the hormone controls the rate of metabolism, growth and development.

Each kidney contains about a million nephrons, and each nephron consists of a Bowman's capsule enclosing a knot of capillaries called the glomerulus, followed by a tubule in which useful substances are reabsorbed; together they filter the blood and form urine.

The islets of Langerhans are patches of endocrine tissue in the pancreas, and their beta cells secrete insulin, which lowers the level of glucose in the blood by helping cells take it up and by storing the surplus as glycogen; a lack of insulin causes diabetes mellitus.

The cerebellum lies behind and below the cerebrum and coordinates voluntary muscular activity, so it keeps the body balanced and the posture steady; damage to it causes a staggering walk even though the muscles are strong.

The Austrian scientist Karl Landsteiner discovered the A, B and O blood groups in 1901 and received the Nobel Prize for Physiology or Medicine in 1930 for the work; he was also associated with the discovery of the Rh factor, named after the rhesus monkey.

Red blood cells are produced in the red bone marrow, lose their nucleus on maturing and survive roughly four months, after which they are broken down in the spleen, which is accordingly called the graveyard of red blood cells; the iron released from their haemoglobin is used again.

The sino-atrial node is a small patch of specialised muscle tissue in the wall of the right atrium near the opening of the superior vena cava, and it generates the impulse that sets the rate of each heartbeat without any outside stimulus, which is why it is called the pacemaker.

The liver weighs about one and a half kilograms and is both the largest gland and the largest internal organ of the body; it secretes bile, stores glycogen, iron and vitamin A, converts ammonia into urea and detoxifies drugs and poisons.

The adult human skeleton has 206 bones, of which 80 belong to the axial skeleton, that is the skull, vertebral column and chest, and 126 to the appendicular skeleton of the limbs and girdles.

The stapes, shaped like a stirrup, is the innermost of the three ossicles of the middle ear and is the smallest bone in the human body, measuring only a few millimetres; the smallest muscle of the body, the stapedius, is attached to it.

Nomadic Elephant is the bilateral army exercise held by India and Mongolia. The exercise began in 2004 and is held by turns in India and Mongolia, the venue alternating between the two countries.

Naseem-Al-Bahr, Arabic for "sea breeze", is the bilateral naval exercise between the Indian Navy and the Royal Navy of Oman.

A Wing Commander of the Indian Air Force holds the same rank as a Lieutenant Colonel in the Army and a Commander in the Navy.

Operation Sadbhavna is the Indian Army's goodwill and civic action programme for people in remote and disturbed areas. The Army began it in the late 1990s in Jammu and Kashmir and later took it to Ladakh and parts of the North-East.

The operations fall in 1965, 1971, 1984 and 1999, in that order: Riddle, Cactus Lily, Meghdoot, Safed Sagar. Operation Riddle was the Indian Army's thrust towards Lahore in September 1965, during the second India–Pakistan war.

In its campaign work the Department of Ex-Servicemen Welfare has made electronic waste a priority area, collecting it, segregating it scientifically and disposing of it responsibly in keeping with the E-Waste (Management) Rules, and it frames that effort through the Waste to Wealth idea of turning discarded material into something…

The Department of Ex-Servicemen Welfare, abbreviated DESW, is a department of that ministry and is responsible for the welfare of former service personnel and their families, which is why the faster disposal of grievances and Parliamentary assurances under the campaign matters to veterans and pensioners.

Special Campaign 6.0 is a nationwide drive of the Government of India run through that month, with the twin purposes of making Swachhata a permanent feature of government working and of cutting the backlog of pending matters in government processes.

More than four-fifths of the craft is of Indian origin, and it is propelled by three diesel engines that drive waterjets, which gives it the agility needed in shallow waters.

Mangrol is a coastal town and a well-known fishing harbour in the Junagadh district of that state, and the Navy has used the name before: the minesweeper INS Mangrol, with the pennant M85, served until April 2004.