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Biology Active Transport (1.3.3)

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Questions and Answers

What is the primary difference between active transport and diffusion?

Active transport moves particles against the concentration gradient using energy. (correct)

Diffusion requires energy, while active transport does not.

Active transport moves particles from high to low concentration.

Diffusion uses protein channels, while active transport does not.

Active transport in root hairs is used to take up water from the soil.

False (B)

What type of energy is used in active transport?

energy from respiration

In the gut, active transport moves glucose and amino acids from the gut into the ______.

<p>bloodstream</p> Signup and view all the answers

Match the locations of active transport with their purpose:

<p>Root hairs = Uptake of mineral ions Gut = Absorption of glucose and amino acids Both root hairs and the gut = Transport against concentration gradient Neither root hairs nor the gut = Diffusion through cell membranes</p> Signup and view all the answers

Flashcards

Active Transport

Movement of molecules from an area of low concentration to an area of high concentration. This process requires energy from respiration.

Root Hairs

Tiny hair-like structures on plant roots that absorb water and mineral ions from the soil.

Concentration Gradient

The difference in concentration of a substance between two areas. Diffusion moves substances down the concentration gradient.

Respiration

Process that provides energy for active transport. Occurs in cells to break down sugar for energy.

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Active Transport in the Gut

Active transport in the gut moves substances like glucose and amino acids from the gut into the bloodstream, even when the concentration is lower in the gut.

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Study Notes

Active Transport (1.3.3)

Active transport moves particles from a low concentration area to a high concentration area, against the concentration gradient. This contrasts with passive diffusion. Active transport requires energy.
Active transport is fueled by respiration.

In Root Hairs

Plants use active transport to absorb water and mineral ions from the soil for growth.
Mineral ions are often present in higher concentrations inside the root hair cells than in the soil. Therefore, diffusion wouldn't work. Active transport is necessary against the concentration gradient.

Active Transport in the Gut

Active transport moves substances like glucose and amino acids from the digestive tract (gut) to the bloodstream.
Sometimes the concentration of dissolved substances (e.g., sugar) in the gut is lower than in the blood. In such instances, the concentration gradient would not drive diffusion into the blood; hence, active transport is needed.

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Description

Explore the concept of active transport in this quiz, focusing on its role in plant root hairs and the human gut. Understand how substances move against the concentration gradient and the energy requirements for such processes. Test your knowledge on the mechanisms and significance of active transport in biological systems.