Question

1. The major functions of the plasma membrane do NOT include...
Ribosome production
Separation of the fluid environments inside and outside the cell
Regulation of molecules and ions that pass into and out of the cell
Recognition and communication between different cells
Maintaining connections between adjacent cells

2. Cholesterol is removed from your bloodstream because protein receptors on your cells detect the presence of LDL molecules and trigger endocytosis. What kind of active transport is this?
Receptor-mediated endocytosis
Facilitated diffusion
Passive transport
Simple diffusion
Exocytosis

3. Potassium has an atomic mass of 39 and contains 20 neutrons. How many protons does it contain?
9
19
20
39
59

4. Homeostais is exhibited in all but one of the following statements. Select the exception
Cancer cells spreading into other tissues
Blood pressure is regulated
Hormones maintain blood sugar levels within a certain range
Sweating causes evaporative cooling to prevent overheating

Answer 1