active transport by endocytosis
active transport by endocytosis
Animal cells obtain molecules such as proteins through the process of protein synthesis. This process occurs in the cell's ribosomes, which use instructions from the cell's DNA to assemble proteins. The cell may also take in molecules from the surrounding environment through processes like endocytosis.
oxygen
Cells prefer to use passive transport because it does not require energy input from the cell. Active transport, on the other hand, requires energy in the form of ATP to move molecules against their concentration gradient. Passive transport is more efficient for moving molecules down their concentration gradient.
cells
Many cells in the body use exocytosis to release enzymes or other proteins that act on other parts of the body or to release molecules that helps cells to communicate with each other.
oxygen
oxygen
Yes, brain cells, like all cells in the body, are made up of molecules. These molecules include proteins, lipids, carbohydrates, and nucleic acids, which together form the structures and functions of the cells. Neurons, the primary type of brain cell, use these molecules to transmit signals and communicate with each other, playing a crucial role in brain function.
Exocytosis is the method that most cells use in order to dispose of large molecules of waste materials.
A cell is a living thing which is the basic unit for life. All living things are comprised of these cells. On the other hand, a molecule is composed of atoms covalently bonded to one another. Since cells are comprised of atoms (and molecules) without groups of atoms, there are no cells, thus no living organisms such as you and I.
Cellular respiration release chemical energy from sugars and other carbon-based molecules to make ATP when oxygen is present. Cellular respiration is an aerobic process, meaning that it needs oxygen to take place.