Multiple Choice QuestionSmall cells maintain more efficient transport systems becauseMultiple choice question.small cell size minimizes the ability of diffusion and motor proteins to transport nutrients and waste products.diffusion over large distances is slow and inefficient.diffusion over large distances is quick and efficient.

cell size maximizes the ability of diffusion and motor proteins to transport nutrients and waste products.

Which type of epithelial cell is best adapted to aid diffusion?Question 5Select one:a.Squamousb.Columnarc.Cuboidald.Psuedocolumnare.none of the above

Diagrams A, B and C show cells from different parts of the human body, all drawn to the same scale.7. (a) Which cell, A, B or C, appears to have adaptations to increase diffusion into or outof the cell? Give one reason for your choice. ___________________________________________________________________ ___________________________________________________________________ (1) Page 15 of 18bone marrowEmbryonic stem cells have the ability to differentiate into any type of cell in the body whereas stem cells from bone marrow can only differentiate into certain cells(b) (i) Cell C is found in the pancreas. Name one useful substance produced by the pancreas. ______________________________________________________________ (1) (ii) Use information from the diagram to explain how cell C is adapted for producing this substance. ______________________________________________________________ ______________________________________________________________ ______________________________________________________________ ______________________________________________________________

1 Assertion (A): Diffusion does not meet high energy requirements of multi-cellular organismsReason (R) : Diffusion is a fast process but occurs at the surface of the body.

Which process could result in the net movement of a substance into a cell, if the substance is more concentrated in the cell than in the surroundings?facilitated diffusiondiffusionosmosisactive transport