Which of the following statements regarding blood and osmotic pressure at the capillaries is correct?

1- the arterial end of the capillaries has the highest blood pressure because blood is being forced from the heart to the capillary bed.

2- the veinous end of the capillary has the highest osmotic pressure because of the difference in carbon dioxide and oxygen concentrations between the capillaries and tissue.

3- the arterial end of the capillary has the highest osmotic pressure because of the difference in carbon dioxide and oxygen concentrations between the capillaries and tissue.

4- the veinous end of the capillaries has the highest blood pressure because blood is being forced from the heart to the capillary bed.

5- both a and b are correct.

5- Both A and B are correct.

Blood pressure or hydrostatic pressure is the primary force that transports blood between the capillaries and tissues. Capillary blood pressure or capillary hydrostatic pressure-CHP or arteries is the force that drives blood out of capillaries and into the tissues. Hydrostatic pressure of interstitial fluid is called the interstitial fluid hydrostatic pressure –IFHP. Since the CHP is higher than IFHP fluid moves from the capillary and into the interstitial fluid via process called filtration.

Osmotic pressure or oncotic pressure is the movement of fluid from the interstitial fluid back into the capillaries and it is determined by osmotic concentration gradients. Since osmotic pressure is higher in vein capillaries than in the interstitial fluid, the fluid moves back into the capillary via the process called reabsorption.

4.) metal

"-the movement of carbon from the nonliving environment into living things and back to the environment

-carbon is the essential component of proteins, fats, and carbohydrates (which make up all organisms)

-carbon exists in air, water, and living organisms

-producers convert carbon dioxide in the atmosphere into carbohydrates during photosynthesis

-bacteria in the atmosphere cycles through the system in filtration units

-in cellular respiration, carbon is released back into the atmosphere as carbon dioxide

-some carbon is stored in limestone (forming one of the largest "carbon sinks" on earth)

-largest carbon reservoir on earth= limestone

-carbon stored in the bodies of organisms as fat, oils, or other molecules may be released into the soil or air when the organism dies

-this may form deposits of coal, oil, or natural gas (fossil fuels, which increased the atmospheric carbon dioxide)

-fossil fuels store carbon left over from bodies of organisms that died millions of years ago

-they are located in the surface of earth, deep within the earth and beneath the ocean floor."    

brain development. a child's brain undergoes an amazing period of development from birth to three—producing more than a million neural connections each second. the development of the brain is influenced by many factors, including a child's relationships, experiences and environment.

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