Standby Agreement. An agreement between the issuer of a security and its underwriters stating that the underwriters are responsible for any unsold portion of the issue. That is, the underwriters agree to buy the remainder of a new issue if they are unable to place its entirety with investors.
A sponge has water flow in through the pores. The water contains the food and oxygen the sponge needs. Respiration. A sponge takes in water through its pores and in more advanced forms, with canals that move the water to all throughout the sponge.
As blood passes down the descending vessel of the vasa recta salt diffuses in and water moves out by osmosis, As blood passes the ascending vessel of the vasa recta salt diffuses out and water moves in by osmosis.he descending limb of the loop of Henle is passively permeable to water, the ascending limb is impermeable to water and actively transports Na and Cl ions out of the tubular lumen into the interstitial fluid.