AP BIOLOGY

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ANIMAL PHYSIOLOGY

OSMOREGULATION

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Considering the four choices below, which two represent active transport?From high to low concentration From low to high concentration Using cellular energy Without using cellular energy
A
High to low; using cell energy
B
High to low; without using cell energy
C
Low to high; using cell energy
D
Low to high:without using cell energy
Explanation: 

Detailed explanation-1: -Active transport is the movement of dissolved molecules into or out of a cell through the cell membrane, from a region of lower concentration to a region of higher concentration. The particles move against the concentration gradient, using energy released during respiration .

Detailed explanation-2: -During active transport, substances move against the concentration gradient, from an area of low concentration to an area of high concentration. This process is “active” because it requires the use of energy (usually in the form of ATP). It is the opposite of passive transport.

Detailed explanation-3: -(A) These are facilitative transport proteins (they transport glucose (or fructose) from areas of high concentration to areas of low concentration.

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