Question

In ________and ________ no energy is used. Which one needs a helper to get things across?__________

Someone please help me out on this!

Answer 1

Passive transport does not require energy and occurs when substances move naturally from an area of higher concentration to an area of lower concentration. On the other hand, active transport requires energy and moves molecules against their concentration gradient. ATP (adenosine triphosphate) is the form of energy used in active transport.

Step-by-step explanation:

Passive transport and active transport are the two basic ways that substances can cross a cell's plasma membrane. Passive transport does not require energy and occurs when substances move naturally from an area of higher concentration to an area of lower concentration. On the other hand, active transport requires energy and moves molecules against their concentration gradient, from an area of low concentration to an area of high concentration.

Transporting heavy objects also requires energy. In the case of moving something against a concentration gradient, the cell uses active transport, which requires the input of energy in the form of ATP (adenosine triphosphate) produced by cellular respiration. Active transport pumps molecules and ions across membranes against their concentration gradient, and typically involves the use of protein carriers.

Answer 2

In DIFFUSION AND FACILITATED DIFFUSION no energy is used. The one that needs a helper to get thing across is FACILITATED DIFFUSION. Facilitated diffusion involves the diffusion of materials across the cell plasma membrane with the aid of membrane proteins such as carriers and channels. The process of diffusion does not need a carrier, the molecules to be transported just move on their own from the area of high concentration to the region of low concentration until the concentration in the space become uniform.