Circle all of the following that go through active transport.
a)osmosis b)endocytosis c)diffusion d)exocytosis
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Endocytosis and exocytosis are examples of active transport. They require energy for transport.
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Out of all the options provided, the process of active transport is involved in:
b) endocytosis
d) exocytosis
Osmosis and diffusion are passive processes that do not require energy input. Active transport, on the other hand, involves the movement of molecules or ions against their concentration gradient and requires energy expenditure by the cell.
Of the options given, the processes that go through active transport are b) endocytosis and d) exocytosis.
To understand this, let's first understand what active transport is. Active transport is a cellular process that moves molecules or ions against their concentration gradient, meaning it requires the input of energy. In other words, active transport moves substances from an area of lower concentration to an area of higher concentration.
a) Osmosis is a process that involves the movement of water molecules across a selectively permeable membrane from an area of lower solute concentration to an area of higher solute concentration. However, osmosis does not involve the direct movement of solute molecules or ions, so it does not go through active transport.
b) Endocytosis is a process by which cells engulf substances from their external environment by forming a vesicle around the substance. This process requires energy and can occur by various types, such as phagocytosis (solid particles) or pinocytosis (fluid droplets). Since endocytosis involves the transport of substances into the cell against its concentration gradient, it goes through active transport.
c) Diffusion is a passive process that involves the movement of substances from an area of higher concentration to an area of lower concentration. Diffusion does not require the input of energy and thus does not go through active transport.
d) Exocytosis is the opposite process of endocytosis. It involves the release of substances from cells by fusing a vesicle containing the substance with the cell membrane. Like endocytosis, exocytosis requires energy and transports substances against their concentration gradient, so it goes through active transport.
In summary, the processes that go through active transport are b) endocytosis and d) exocytosis.