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

If the diameter of the afferent renal arteriole is decreased and that of efferent renal arteriole is increased, the ultrafiltration will

Which one do not filter out from blood to Bowman’s capsule in glomerular ultrafiltration

Choose correct option for given statements :
(i) The universe is very old almost 20 billion years old.
(ii) In the solar system of the milky way galaxy, earth was supposed to have been formed about 4.5 billion years back.
(iii) Life appeared 500 million years after the formation of earth.
(iv) The first non-cellular forms of life could have originated 3 billion years back. They would have been giant molecules (RNA, Protein, Polysaccharides, etc.).
(v) The first cellular form of life did not possibly originate till about 2000 million (2 billion) years ago. These were probably single-cells.
(vi) All life forms were in water environment only.

Choose correct pair

Assertion: Each kidney has nearly one million complex tubular structures called nephrons, which are the functional units.
Reason: Nephrons begins with a double walled cup- like structure called Bowman's capsule, which encloses the glomerulus.

Select wrong statement and mark right option for wrong statement.
(i) Platelets also called thrombocytes are cell fragments produced from megakaryocytes.
(ii) Blood normally contains 1.500,00-3,500,00 platelets mm^-3
(iii) Platelets can release a variety of substances most of which are involved in the coagulation or clotting of blood.
(iv) A reduction in number of platelets can lead to clotting disorders which will lead to excessive loss of blood from the body.
(v) Megakaryocytes are special cells of the bone marrow.
(vi) Thrombokinase, present in the platelets in an inactive state.

Dengue is transmitted by