OBJECTIVE LIFE SCIENCE
CELL BIOLOGY
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
Rate of exchange of materials
|
|
|
Rate of heat production
|
|
|
Rate of waste production
|
|
|
Rate of oxygen consumption
|
Detailed explanation-1: -Explain the concepts that the Rate of exchange is proportional to a cells surface area and the amount of exchange material is proportional to a cell’s volume.
Detailed explanation-2: -The surface area of a cell is directly proportional to the rate of diffusion. So, if the surface area or the thickness of the cellular membrane is increased, the rate of diffusion across this cellular membrane also increases. And if the surface area is decreased, the rate of diffusion decreases.
Detailed explanation-3: -As the volume of a cell increases, it becomes harder to efficiently transport materials in and out of the cell. A cell with a greater surface area to volume ratio has more plasma membrane to transport these substances relative to the volume of the cell.