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What are all the differences between active and passive transport?
Passive transport occurs when the concentration of something on one side of membrane is different from the concentration on the other side. It occurs when that substance can pass through the membrane, and always in the direction of more -> less. No energy is required to make the substance move; in fact, this movement generates energy. This is like rolling a rock down a hill--it just does it on its own.Active transport occurs in the opposite direction, from less -> more. It requires energy for transport. This is like rolling a rock up a hill--you have to push it the entire way!Both involve the transport of a substance across a membrane, and the change in concentrations on different sides of a membrane. Both are also important to the proper functioning of a cell.Active transport requires energy, but passive transport requires none.Active transport requires a special protein to make the transport occur, but passive transport requires none.
The cell does not need to expand energy ATP in order to perform what?
The cell does not need to expand ATP to perform passive transport processes such as diffusion or osmosis, where molecules move from areas of high concentration to low concentration without the need for energy input.
Are osmosis and endocytosis passive transports?
It is an active transport,Transport mechanisms fall into two catagories passive and active. Passive transport mechanisms do not require the cell to do work for the substance to enter or leave the cell. Instead the energy involved comes from the kinetic energy of the molecules in solution. Active transport mechanisms involve the cell to use cellular energy usually in the form of ATP to power special protein pumps to bring material into the cell.Passive transport mechanisms Active Transport mechanismsSimple diffusionOsmosisFacilitated DiffusionSimple protein channelsGated channelsActive transport via protein pumpsBulk flow mechanismsendocytosisphagocytosispinocytosisexocytosisThe passive transport mechanisms and the protein pump mechanisms involve movement of substances as single molecules across the membrane. The "bulk" flow mechanisms endocytosis and exocytosis enable the cell to take in very large packages of molecules...say a food item from the environment. Many books treat these bulk flow mechanisms as separate from active transport for that reason.
What must a cell expand during active transport to accomplish movement of a substance?
During active transport, a cell must expand its energy in the form of ATP to pump molecules or ions across a membrane against their concentration gradient. This process requires energy to create a concentration gradient and move substances from low to high concentration.
Osmosis does not require what?
Osmosis does not require energy input, such as ATP, for the movement of molecules across a semi-permeable membrane. Instead, it relies on the concentration gradient of solute molecules to drive the movement of water molecules.
Both inhalation and exhalation always requires the expenditure of energy?
Inhalation typically requires energy because it involves the contraction of muscles, such as the diaphragm and intercostal muscles, to expand the thoracic cavity and draw air into the lungs. Exhalation can be passive during normal breathing, relying on the elastic recoil of lung tissues, but it can also require energy during forced exhalation, where muscles contract to push air out. Therefore, while inhalation always requires energy, exhalation may or may not, depending on the breathing context.
What happens to chlorophyll's electrons when the sun's energy is absorbed?
They move into what is called an electron transport chain. The answer is book size. This is a very simple answer and I don't know much more and forgot the rest, hopefully somebody will expand. Sorry.
When most substances absorb heat energy they?
expand
Are lungs passive or active players in pulmonary ventilation?
Lungs are passive players in pulmonary ventilation. The diaphragm and intercostal muscles contract to create a pressure gradient that allows air to move in and out of the lungs. The lungs simply expand and contract in response to these pressure changes.
What are the active and passive parts of breathing?
The active part of breathing involves the contraction of the diaphragm and intercostal muscles to expand the chest cavity, allowing air to enter the lungs. The passive part of breathing involves the relaxation of these muscles, causing the chest cavity to decrease in size and air to be expelled from the lungs.
Is sound a medium wave?
Sound is a type of energy that travels in waves through a medium, such as air, water, or solids. These waves compress and expand the particles in the medium, transferring energy and creating the sensation of hearing.
Why do gases expand in charles law?
the kinetic energy of constant pressure causes the gasses to expand. when they are heated, the molocules get bigger causing the gas to expand. if it gets hot enough, it will explode.
