But yeah, anywhere in your 20s is still young. Early 30s is where that ends. kingkong113 said: â. I ask this because this girl in my Precal class has been all on my dick and is clearly looking to hook up but she is like 28. but she did say and I quote My Pussy is tight though lol who says that to someone.
Active transport. Active transport is the movement of molecules across a cell membrane from a region of their lower concentration to a region of their higher concentrationâin the direction against some gradient or other obstructing factor (often a concentration gradient).
Active transport. Definition. noun. A kind of transport wherein ions or molecules move against a concentration gradient, which means movement in the direction opposite that of diffusion â or â movement from an area of lower concentration to an area of higher concentration.he movement of a substance across a membrane from a region of its lower concentration to a region of its higher concentration against a concentration gradient, using energy. This energy is supplied through respiration using ATP. Mitochondria (cell organelles in the cytoplasm) control energy release.