PHYSIOLOGY
SYNAPTIC PHYSIOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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As an organism grows, its volume increases faster than its surface area
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The higher the surface area to volume ratio, the slower exchange is
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The rate of substances entering or leaving cells depends mainly on volume
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The rate at which substances are produced or used depends mainly on the surface area
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Detailed explanation-1: -Answer and Explanation: The correct answer is A) As cells get larger, the volume increases more than the surface area. In a cell, the unit of volume increases in cubes but the surface area increases in squares. This fact signifies that the volume of a cell increases at a much faster rate than the surface area.
Detailed explanation-2: -The surface area:volume ratio reduces as the size of an organism increases, and this means that for larger organisms simple diffusion may not provide an adequate supply of dissolved substances such as oxygen.
Detailed explanation-3: -As the radius of a cell increases, its surface area increases as the square of its radius, but its volume increases as the cube of its radius (much more rapidly). Therefore, as a cell increases in size, its surface area-to-volume ratio decreases.
Detailed explanation-4: -As the size of an organism increases, its volume increases faster than its surface area. This means that the surface area to volume ratio decreases as the organism gets larger.
Detailed explanation-5: -A larger surface area to volume ratio is more efficient than a smaller ratio. This is due to the amount of plasma membrane relative to the volume of the cell. The more plasma membrane available to transport materials in and out of the cell, the more efficient the cell will be in completing its specific functions.