When blood osmolality increases, is released by the posterior pituitary and acts on the kidney to increase water retention. rev: 12_09_2013_qc_41897 antidiuretic hormone renin insulin angiotensin ii?

Answer- Antidiuretic Hormone (ADH)

When there is an increase in blood osmolality, the increased blood osmolality stimulates the hypothalamus, which in turn stimulates the posterior pituitary gland to secrete Antidiuretic Hormone (ADH). The secreted ADH then acts on the kidney to increase water retention. 

typically, most spiders possess eight eyes. however, others have as many as 12, and some don't have any. these eyes are for detecting light from dark, deciphering shapes and for gathering their prey.

one is through turgidity. this occurs before ground tissue ( collenchyma

and sclerenchyma cells) become well

developed to give structural support to the plant as it grows bigger. the xylem

tissue (composed of rigid tissue) of the young

plant render this support and also maintaining osmotic turgidity of the surrounding

plant cells.