Why do erythrocytes swell and burst when placed in water?
(a) since water concentration is higher outside the cell, water moves inward by passive diffusion.
(b) since hemoglobin concentration is higher inside the cell, hemoglobin moves outward by exocytosis.
(c) since potassium ions are more concentrated inside the cells, potassium ions move outward by osmosis.
(d) erythrocytes pump water inward by active transport to balance osmotic gradients.
(e) water is a universal solvent and simply dissolves the erythrocyte membranes.

A.
There is more sodium inside the cell than outside. There is a saying that "water follows salt". It is found in the case of osmosis and the semipermeable membrane around the cell. In this case there is more salt inside so water will move inside. The cell can break with too much water.

Nimbostratus is the correct answer.
explanation: nimbostratus clouds are the type of clouds that are mostly likely present on gray, rainy day. these clouds produce continuous rain, snow and there is no thundering or lightening either.

Answer:

it provides an alternative energy pathway for the reaction to proceed.

explanation:

a catalyst is a substance that speeds up the rate of a chemical reaction but is not consumed during the course of the reaction.

catalysts increase the rate of reaction without being used up. they do this by lowering the activation energy needed. with a catalyst, more collisions result in a reaction, so the rate of reaction increases. different reactions need different catalysts.

a catalyst works by providing an alternative reaction pathway to the reaction product. the rate of the reaction is increased as this alternative route has a lower activation energy than the reaction route not mediated by the catalyst.