STD 11 - 19. Chemical coordination and integration — NEET STD 11 Science — Question

Knee joint is

The biological agents of disease include

In which of the following condition, progressive degeneration of skeletal muscles happens?

A specialised centre known as respiratory rhythm centre regulates respiration. It is located in

The body of frog is divisible into

Other than the kidneys, lungs, liver and skin also help in the elimination of excretory wastes. Which of the following statements are not true ?
(i) Our lungs remove large amounts of CO₃ 200 ml/min and also significant quantities of water every day.
(ii) Liver, the largest gland in our body, secretes bile-containing substances like bilirubin, biliverdin, cholesterol, degraded steroid hormones, vitamins and drugs.
(iii) The sweat and sebaceous glands in the skin can eliminate certain substances through their secretions.
(iv) Sweat produced by the sweat glands is a watery fluid containing NaCl, large amounts of urea, citric acid, etc.
(v) Primary function of sweat is the removal of some of the wastes mentioned above, it also facilitate a cooling effect on the body surface.
(vi) Sebaceous glands eliminate certain substances like sterols, hydrocarbons and waxes through sebum.

Ammonia is the chief excretory substance in

Select incorrect sentence for down's syndrome

Assertion: Open circulatory system is present in arthropods and molluses
Reason: Blood pumped by the heart passes through large vessels into open spaces or body cavities called sinuses.

Assertion : In vertebrates, the liver is also referred as an accessory excretory organ.
Reason : Liver helps kidneys in the secretion of urine.