NEET BIOLOGY

Detailed explanation-1: -The plasma membrane, or the cell membrane, provides protection for a cell. It also provides a fixed environment inside the cell, and that membrane has several different functions. One is to transport nutrients into the cell and also to transport toxic substances out of the cell.

Detailed explanation-2: -Cell Membrane: Your Body’s Gatekeeper It keeps all the cellular contents safe so that they can function properly without being damaged. The cell membrane is referred to as semi-permeable, which means it allows various nutrients to pass through the wall and sends the waste products out to be removed from the body.

Detailed explanation-3: -The cell membrane, therefore, has two functions: first, to be a barrier keeping the constituents of the cell in and unwanted substances out and, second, to be a gate allowing transport into the cell of essential nutrients and movement from the cell of waste products.

Detailed explanation-4: -Endocytosis is a pathway for internalizing solid particles ("cell eating” or phagocytosis), small molecules and ions ("cell drinking” or pinocytosis), and macromolecules. Endocytosis requires energy and is thus a form of active transport.

Detailed explanation-5: -Using a process called endocytosis, cells ingest nutrients, fluids, proteins and other molecules. An international team of researchers recently revealed new details about endocytosis, an activity that, when it malfunctions, can lead to diseases such as muscular dystrophy, Alzheimer’s and leukemia.