Multiple Choice
What type of cellular transport requires a cell to use energy?
331
views
6. The Membrane
Active Transport
Struggling with General Biology?
Join thousands of students who trust us to help them ace their exams!Watch the first videoMultiple Choice
Why is active transport an important process in cells?
A
It allows cells to move substances against their concentration gradient.
B
It enables cells to passively diffuse substances across the membrane.
C
It is responsible for the production of ATP in mitochondria.
D
It helps cells to maintain equilibrium with their environment.
Verified step by step guidance1
Active transport is a cellular process that moves substances across the cell membrane against their concentration gradient, meaning from an area of lower concentration to an area of higher concentration.
This process requires energy because it is moving substances in a direction that is not naturally favored by diffusion, which typically moves substances from high to low concentration.
The energy for active transport is often provided by ATP (adenosine triphosphate), which is used to power transport proteins embedded in the cell membrane.
Active transport is crucial for maintaining cellular homeostasis, allowing cells to uptake necessary nutrients and expel waste products, even when these substances are in lower concentration outside the cell.
By enabling the movement of ions and molecules against their concentration gradients, active transport helps cells maintain specific internal conditions that are different from their external environment, which is essential for various cellular functions.
Related Videos
Related Practice
Active Transport practice set
Problem sets built by lead tutorsExpert video explanations