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TLS Online TPP Program

#Question id: 1287

Biological roles of proteoglycans and hyaluronan include all of the following, except:

#Unit 4. Cell Communication and Cell Signaling

  1. maintenance of porosity for the diffusion of small molecules between cells and tissues.

  2. presentation of growth factors to cells.

  3. resistance to compression.

  4. storage sites for extracellular energy reserves.

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TLS Online TPP Program

#Question id: 2067

#Unit 2. Cellular Organization

Which of the following would likely diffuse through the lipid bilayer of a plasma membrane most rapidly?
TLS Online TPP Program

#Question id: 2068

#Unit 2. Cellular Organization

Which of the following molecules dramatically increases the rate of diffusion of water across cell membranes?
TLS Online TPP Program

#Question id: 2069

#Unit 2. Cellular Organization

Which of the following processes includes all of the others?
TLS Online TPP Program

#Question id: 2070

#Unit 2. Cellular Organization

The sodium-potassium pump is called an electrogenic pump because it:
TLS Online TPP Program

#Question id: 2071

#Unit 2. Cellular Organization

Diffusion of ions across membranes through specific ion channels is driven by:
TLS Online TPP Program

#Question id: 2072

#Unit 2. Cellular Organization

Which of the following structures would decrease the electrochemical gradient across a membrane?