transverse (T) tubule
A tube formed by the inward extension of the cell membrane is called a pseudopod. This structure is used by cells for processes such as engulfing particles or migrating.
ENDOCYTOSIS
ENDOCYTOSIS
ENDOCYTOSIS
ENDOCYTOSIS
ENDOCYTOSIS
ENDOCYTOSIS
ENDOCYTOSIS
The cell membrane is composed of a type of lipid molecule called a phospholipid, which has two fatty acids and a phosphate group extending from a glycerol molecule. This unique structure allows phospholipids to form a bilayer, with hydrophobic (water-repelling) tails facing inward and hydrophilic (water-attracting) heads facing outward, creating a semi-permeable barrier that regulates the movement of substances in and out of the cell.
This process is called endocytosis.
Endocytosis is the cellular process that involves the inward sinking of a small patch of membrane to form a cytoplasmic vesicle. This process allows cells to take in substances from the external environment.
Endocytosis is the process where a molecule causes the cell membrane to bulge inward, forming a vesicle to bring the molecule inside the cell. This is distinct from exocytosis, which is the process of releasing molecules from a cell by fusing vesicles with the cell membrane and expelling their contents.