sink

Examples of sink in the following topics:

• Transportation of Photosynthates in the Phloem

  • The points of sugar delivery, such as roots, young shoots, and developing seeds, are called sinks.
  • Seeds, tubers, and bulbs can be either a source or a sink, depending on the plant's stage of development and the season.
  • The products from the source are usually translocated to the nearest sink through the phloem.
  • Once in the phloem, the photosynthates are translocated to the closest sink.
  • Sucrose concentration in the sink cells is lower than in the phloem STEs because the sink sucrose has been metabolized for growth or converted to starch (for storage) or other polymers (for structural integrity).

• Energy Sources

  • Many organisms sink to the bottom of the ocean when they die in the open water.
  • When the temperature of the surface water begins to reach 4 °C, the water becomes heavier and sinks to the bottom.
  • As air temperatures drop in the fall, the temperature of the lake water cools to 4 °C; this causes fall turnover as the heavy cold water sinks and displaces the water at the bottom.
  • Surface water temperature changes as the seasons progress, causing denser water to sink.

• Rhizaria

  • The shells of dead radiolarians sink to the ocean floor, where they may accumulate in 100 meter-thick depths.

• Strategies for Acquiring Energy

  • As no sunlight penetrates to this depth, the ecosystem is supported by chemoautotrophic bacteria and organic material that sinks from the ocean's surface.

• Skeletal Muscle Fibers

  • The sarcoplasmic reticulum acts as a sink of Ca+ ions, which are released upon signalling from the transverse tubules.

• Water’s Heat of Vaporization

  • As a result, water acts as a heat sink, or heat reservoir, and requires much more heat to boil than does a liquid such as ethanol (grain alcohol), whose hydrogen bonding with other ethanol molecules is weaker than water's hydrogen bonding.

• Water’s Cohesive and Adhesive Properties

  • The weight of the needle is pulling the surface downward; at the same time, the surface tension is pulling it up, suspending it on the surface of the water and keeping it from sinking.

• Freshwater Biomes

  • At the bottom of lakes and ponds, bacteria in the aphotic zone break down dead organisms that sink to the bottom.

• Extremophiles and Biofilms

  • They also colonize household surfaces, such as kitchen counters, cutting boards, sinks, and toilets, as well as places on the human body, such as the surfaces of our teeth.

• Chromalveolata: Stramenopiles

  • The excess diatoms die and sink to the sea floor where they are not easily reached by saprobes that feed on dead organisms.