Cell Biology

2. A protein which binds a ligand such as a hormone or neurotransmitter
6. A channel protein through which water travels
7. A protein which serves as a catalyst
10. The property of proteins binding ligands which means only certain ligands can bind to it.
13. Cell-eating function of white blood cells.
16. An organelle resembling flattened membranous sacs covered with ribosomes (abbreviation).
18. A type of transport that requires energy to cross the cell membrane, and is facilitated by ATP.
19. Spanning the cell membrane from the extracellular space to the intracellular space
21. Organelles consisting of protein and RNA, which assembles amino acids into proteins.
22. Equal concentrations of solutes.
23. Movement of particles through a selectively permeable membrane by hydrostatic pressure.
24. Largest organelle in the cell which contains DNA.

1. A low concentration of nonpermeating solutes.
3. An oily film of phospholipids with embedded proteins (2 wd)
4. A type of transport that does not require energy, and may be facilitated by a channel protein.
5. Net movement of particles from high to low concentrations of itself.
7. Transport of substances into the cell.
8. A cell which has no nucleus
9. Hairlike processes 7-10 micrometres long found on nearly every cell
11. Secreting material from the cell.
12. An organelle which forms vesicles such as lysosomes, secretory vesicles and new plasma membrane.
14. The shape of a typical neuron
15. A high concentration of nonpermeating solutes.
17. Diffusion of water through a membrane.
20. Extensions of the membrane between 1-2 micrometres.
25. An organelle with cisternae which synthesizes steroids (abbreviation).