Chapter 5 Osmosis

Solution A: 1.4% (m/v) starch

Solution D: 12.4% (m/v) NaCl

passive transport

water molecule transport protein solvent solute phospholipid

solute transport protein phospholipid solvent water molecule

Both sodium and potassium ions are transported against their concentration gradients.

into ... membranous vesicles

In this diagram of the plasma membranes of two adjoining cells, identify the protein indicated by the white arrow, including its function. an attachment protein that provides structural support a receptor protein that binds with a signaling molecule and relays the message into the cell by activating other molecules inside the cell a protein involved in enzymatic activity an active transport protein that moves molecules across a membrane against their concentration gradient a glycoprotein that is involved in cell-cell recognition

the similarity of the drug molecule to other molecules that are transported into the target cells

B, C, and D A only B only D only C only

glycoprotein phospholipid cholesterol protein extracellular matrix

Hyrdrophobic or hydrophillic

Able to cross lipidid bilayer

osmosis

hypertonic or isotonic hypotonic and isotonic isotonic hypotonic hypertonic

hypertonic ... lost water hypotonic ... shrunk hypotonic ... swelled hypertonic ... gained water isotonic ... neither lost nor gained water

In receptor-mediated endocytosis, receptor molecules are initially localized on the outer surface of the plasma membrane. Where do the receptors end up following endocytosis? on the inside surface of the Golgi apparatus on the outer surface of the nucleus on the inside surface of the plasma membrane on the outer surface of a vesicle on the inside surface of a vesicle