STD 12 - 7. human health and disease — NEET STD 11 Science — Question

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.

Sliding filament theory can be best explained as

The extraction of urine from blood takes place through

Striated appearance of the myofibrils is due to

Movement is one of the significant features of living beings. Which of the following statements are correct for movement ?
(i) Streaming of protoplasm in the unicellular organisms like Amoeba is a simple form of movement.
(ii) Movement of cilia, flagella and tentacles are shown by many organisms.
(iii) Human beings can move limbs, jaws, eyelids, tongue, etc., are not consider as movement.
(iv) Some of the movements result in a change of place or location.
(v) Change of place or location is a voluntary movements are called locomotory movements.
(vi) Walking, running, climbing, flying, swimming are all some forms of locomotory movements.

AIDS is caused by the Human Immuno-deficiency.
(i) By sexual contact with infected person.
(ii) By transfusion of contaminated blood and blood products.
(iii) By sharing infected needles as in the case of intravenous drug abusers.
(iv) From infected mother to her child through placenta.
(v) Through touch or physical contact.
(vi) By biting of infected mosquito.

‘Chicken pox' is caused by