AP BIOLOGY

THE CELL

STRUCTURE AND FUNCTION OF THE CELL

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
What type of environment are cells found in?
A
The cells are surrounded by a liquid layer of interstitual fluid.
B
The cells are surrounded by a jelly-layer of cytosol.
C
The cells are embedded in a solid matrix of blood and bone.
D
The cells are surrounded by air that we breath in
Explanation: 

Detailed explanation-1: -The extracellular fluid, in particular the interstitial fluid, constitutes the body’s internal environment that bathes all of the cells in the body.

Detailed explanation-2: -In the extracellular fluid are the ions and nutrients needed by the cells to maintain cell life. Thus, all cells live in essentially the same environment the extracellular fluid. For this reason, the extracellular fluid is also called the internal environment of the body.

Detailed explanation-3: -The fluid that surrounds living cells within tissues is called interstitial fluid, which has a unique composition relative to both intracellular fluid and blood plasma. Components of plasma move into the tissues, thus the interstitial fluid is partly derived from the plasma of blood.

Detailed explanation-4: -The intracellular fluid is the fluid contained within cells. The extracellular fluid-the fluid outside the cells-is divided into that found within the blood and that found outside the blood; the latter fluid is known as the interstitial fluid.

Detailed explanation-5: -Fluid found in the spaces around cells. It comes from substances that leak out of blood capillaries (the smallest type of blood vessel). It helps bring oxygen and nutrients to cells and to remove waste products from them.

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