Question

Coupled transport differs from primary active transport due to the fact that it uses __________ as a direct source of energy. coupled transport differs from primary active transport due to the fact that it uses __________ as a direct source of energy.

Answer 1

Answer is: coupled transport differs from primary active transport due to the fact that it uses electrochemical potential difference as a direct source of energy.
Primary active transport directly uses metabolic energy (adenosine triphosphate- ATP) to transport molecules across a membrane.
In secondary active transport (coupled transport) there is no direct coupling of ATP, energy derived from the pumping of protons across a cell membrane.

Answer 2

Coupled transport differs from active transport due to the fact that it uses electrochemical potential difference (electrochemical energy) as a direct source of energy.

Further Explanation

Physiological processes in living organisms

Plants and animals use various processes to transport materials from one point to another.

There are classified as either passive transport or active transport.

Active transport  

• It is a type of transport in living organisms that involves movement of substances against a concentration gradient through the plasma membrane.
• Active transport is the homeostatic process that requires chemical energy to move particles across the plasma membrane.
• The chemical energy used during active transport is in the form of ATP.
• Active transport may be classified as primary or secondary (coupled active transport)

Primary Active transport

• This is a type of active transport in which energy used is directly derived from the break down of ATP.
• Phosphorylation of ATP activates the primary active transport protein by giving it one Pi, forming ADP and thus energizing the protein.

Secondary active transport (coupled transport)

• In this type of active transport energy is derived from the energy that has been stored in the form of difference in ionic concentration between the sides of the membrane.
• Energy from electrochemical difference is used as a direct source of energy.

Passive transport

• It is a type of transport that does not involve the use of energy to aid movement of substances in living organisms.
• Passive transport involves free movement of substances and through special types of transporters or carriers.
• Types of passive transport includes; simple diffusion, facilitated diffusion, osmosis, and mass flow among others.

Keywords: Active transport, primary active transport, secondary active transport, chemical energy in the form of ATP, Passive transport,

Learn more about:  

• Active transport: brainly.com/question/11410881
• Chemical energy used in active transport; brainly.com/question/11410881
• Primary active transport; brainly.com/question/1511709
• Secondary active transport; brainly.com/question/1511709
• Passive transport: brainly.com/question/11410881

Level: High school  

Subject: Biology

Topic: Physiological processes in living organisms

Sub-topic: Active transport