Explanation

• The part of the eye that controls the amount of light entering is the Iris.
• It adjusts the size of the pupil according to light intensity.
• In bright light, it reduces light entry; in dim light, it allows more light in.
• This process protects the retina and helps clear vision.

Last verified on 17-05-2026

Explanation

• Neurons are the basic structural and functional units of the nervous system.
• They are specialized nerve cells.
• They transmit electrical and chemical signals.
• They control communication in the body.
• Brain, spinal cord, and nerves are made up of neurons.

Last verified on 08-06-2026

Explanation

• The Cerebellum controls body balance and coordination.
• It helps in smooth movement of muscles.
• It is also involved in simple learned (conditioned) responses.
• It works with other brain parts to maintain posture.
• Damage to it causes loss of balance and shaky movements.

Last verified on 07-06-2026

Explanation

• The average normal body temperature is generally accepted as 98.6°F (37°C).
• A temperature over 100.4°F (38°C) means you have a fever.

Additional Information:

• Hypothermia is the term used for temperature less than 36.50°C.
• Mild Pyrexia is the term used for temperature (99-100°F).
• Moderate Pyrexia is the term used for temperature (100-103°F).
• Severe Pyrexia is the term used for temperature (103-105°F).

Explanation

• The largest endocrine gland is the Thyroid gland.
• It is located in the neck, below the larynx.
• Produces hormones like thyroxine (T4) and triiodothyronine (T3).
• Controls metabolism, growth, and energy levels.

Last verified on 02-05-2026

Explanation

• Digestion begins in the mouth, starting immediately when food is ingested.
• Both mechanical digestion (chewing) and chemical digestion (salivary amylase breaking down carbohydrates) 

Additional information:

• Mouth: Food is chewed and mixed with saliva that contains enzymes to break down carbohydrates.
• Esophagus: Food is swallowed and passes through the esophagus into the stomach.
• Stomach: Food is mixed with stomach acid and enzymes to break down proteins and fats.
• Small Intestine: Nutrients are absorbed into the bloodstream.
• Large Intestine: Water and electrolytes are absorbed, and waste is eliminated.

****

Last updated by NS on 01 MAY 2026

Explanation

• Eccrine sweat glands help regulate body temperature.
• They are most densely found on palms and soles.
• These glands produce watery sweat for cooling.
• They are active throughout the body, especially in these areas.
• This helps maintain body temperature balance.

Last verified on 26-04-2026

Explanation

• A reflex action is a quick, automatic response to a stimulus.
• It is mainly controlled by the spinal cord, which is part of the central nervous system.
• This allows fast response without involving the brain immediately.
• Thus, reflexes are coordinated by the central nervous system.

Last verified on 23-04-2026

Explanation

• The kidney is an important organ responsible for filtering blood and forming urine.
• Its structural and functional unit is the nephron.
• Each kidney contains millions of nephrons.
• They perform filtration, reabsorption, and secretion.

Last verified on 23-04-2026

Explanation

• Oxytocin is the primary hormone responsible for causing the labor pain
• It is often referred to as the "love hormone" or "cuddle chemical,"

Last updated by NA on 22-April-2026