Chapter 4-Cell Structure

Why is it advantageous for cells to be small?

It is advantageous for cells to be so small because they need to be able to maintain homeostasis through diffusion.

What occurs in the nucleolus?

Synthesis of rRNA and ribosome assembly

gap junction

allows of small molecules from cel to cell in a tissue

what are the functions of lysomes?

digest-worn-out organelles and cell debris; digest material taken up by endocytes

anchoring junction

intermediate filaments of cytoskeleton linked to adjoining cells through cadherins

tight junctions

tightly bound, leakproof, fibrous protein seal that surrounds cell

adherents junction

transmembrane fibrous proteins

surface markers

variable, integral proteins or glycolipids in plasma membrane