Tag: means of transport

Questions Related to means of transport

The given table shows properties of four cells systems A, B, C and D. The maximum rate of inward diffusion of water will be observed in which of these systems?

System Intracellular concentration of water  Extracellularconcentration of water
A 0.09 M 0.11 M
B 0.2 M 0.5 M
C 0.05 M 0.6 M
D 0.03 M 0.7 M
bio-chemistry absorption by roots - the processes involved diffusion transport across membrane means of transport

  1. System A

  2. System B

  3. System C

  4. System D

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Correct Option: C
Explanation:

A.In the system A, inward diffusion of water takes place with slow rate

B. In the system B, inward diffusion of water takes place with medium rate.

C.In the system C, inward diffusion of water takes place with maximum rate

D.In the system D, inward diffusion of water takes place with high rate

So, the correct option is ‘System C’.

The factor which does not affect the rate of alveolar diffusion is

bio-chemistry absorption by roots - the processes involved diffusion transport across membrane means of transport

  1. solubility of gases

  2. thickness of the membranes

  3. pressure gradient

  4. reactivity of the gases.

Show answer
Correct Option: D
Explanation:

$O _{2}$ and $CO _{2}$ are exchanged in the alveoli by simple diffusion. The factors that affect the diffusion are pressure gradient of the gases, solubility of the gases and the thickness of the membranes involved in diffusion.