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Absorption of diffusible ions by cells against the concentration gradient is called
- a)Donnan equilibrium
- b)Passive absorption
- c)Active absorption
- d)Osmosis
Correct answer is option 'C'. Can you explain this answer?
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Verified Answer
Absorption of diffusible ions by cells against the concentration gradi...
Active absorption , this is the only absorption method that can move species against their concentration gradient (from low to high concentration). Facilitated diffusion only moves species down their concentration gradient from high to low concentration.
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Absorption of diffusible ions by cells against the concentration gradi...
Active absorption is the process by which cells absorb diffusible ions against the concentration gradient. This process requires the expenditure of energy, usually in the form of ATP, to move ions from an area of lower concentration to an area of higher concentration.
Mechanism of Active Absorption:
There are two types of active absorption mechanisms:
1. Primary Active Absorption:
In primary active absorption, ATP provides energy to the transporters, which directly pump the ions against the concentration gradient. Sodium-potassium ATPase pump is an example of primary active absorption.
2. Secondary Active Absorption:
In secondary active absorption, the energy is derived from the electrochemical gradient established by primary active absorption. Transporters use this electrochemical gradient to move ions against the concentration gradient. The sodium-glucose transporter is an example of secondary active absorption.
Importance of Active Absorption:
Active absorption is an important process for maintaining the ionic balance within cells. It allows cells to regulate the concentration of ions inside and outside the cell, which is critical for many physiological processes such as nerve transmission, muscle contraction, and maintenance of osmotic pressure.
Conclusion:
Therefore, the correct answer is option 'C', which is active absorption.
Mechanism of Active Absorption:
There are two types of active absorption mechanisms:
1. Primary Active Absorption:
In primary active absorption, ATP provides energy to the transporters, which directly pump the ions against the concentration gradient. Sodium-potassium ATPase pump is an example of primary active absorption.
2. Secondary Active Absorption:
In secondary active absorption, the energy is derived from the electrochemical gradient established by primary active absorption. Transporters use this electrochemical gradient to move ions against the concentration gradient. The sodium-glucose transporter is an example of secondary active absorption.
Importance of Active Absorption:
Active absorption is an important process for maintaining the ionic balance within cells. It allows cells to regulate the concentration of ions inside and outside the cell, which is critical for many physiological processes such as nerve transmission, muscle contraction, and maintenance of osmotic pressure.
Conclusion:
Therefore, the correct answer is option 'C', which is active absorption.
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Community Answer
Absorption of diffusible ions by cells against the concentration gradi...
Active absorption , this is the only absorption method that can move species against their concentration gradient (from low to high concentration). Facilitated diffusion only moves species down their concentration gradient from high to low concentration.
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Absorption of diffusible ions by cells against the concentration gradient is calleda)Donnan equilibriumb)Passive absorptionc)Active absorptiond)OsmosisCorrect answer is option 'C'. Can you explain this answer?
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