Some molecules are too large to pass through the cell membrane without transport proteins.
Red blood cells do not need oxygen because their primary function is to transport oxygen to all tissues in the body. They contain a protein called hemoglobin that binds to oxygen in the lungs and releases it to cells throughout the body.
What part of the membrane helps chemical reac
Some molecules are too large to pass through the cell membrane without transport proteins.
Muscle cells, skin cells, and hair cells require lots of protein to maintain their structure and function. Proteins are essential for cell growth, repair, and maintenance in these types of cells.
Some molecules are too large to pass through the cell membrane without transport proteins.
Some molecules are too large to pass through the cell membrane without transport proteins.
Some molecules are too large to pass through the cell membrane without transport proteins.
The main function of the Rough ER is to assist in protein production, so cells where large amounts of protein are produced, such as pancreatic cells (which produce digestive enzymes), will have more RER.In contrast, cells with main functions such as transport will not need as much (or any).
In most mammals, mature erythrocytes (red blood cells) have no nucleus. Matured from stem cells in the bone marrow, they circulate in the blood for about 100 days before being recycled by macrophages. Since their function is the transport of oxygen and CO2 through hemoglobin, they need no protein synthesis after they are completely matured, so there's no need for keeping the nucleus.
Muscle cells.
Cells need organelles such as ATP-powered pumps, transport proteins, and vesicles for active transport to occur. These organelles help in moving molecules and ions across the cell membrane against their concentration gradient, requiring energy input. Active transport is essential for maintaining proper cellular function and homeostasis.
The function of a transport system in a living organism is to move essential substances, such as nutrients, oxygen, and waste products, around the body. This system ensures that all cells receive what they need to function properly and that waste is removed efficiently. Common examples of transport systems include the circulatory system in animals and the vascular system in plants.