What type of movement is passive and down a concentration gradient? O None of these is correct O Facilitated diffusion O Active transport Phagocytosis Simple diffusion

Which of the following mechanisms is used to return mis-sorted proteins from the Golgi apparatus to the endoplasmic reticulum? O Receptor mediated endocytosis O COPII coated vesicles O COPI coated vesicles O Retrograde transport O Autophagy « Previous

Choose between osomosis, active transport, facilitated diffusion, simple diffusion, endo-exo cytosine . -Na+ high concentration outside, low inside. Cell wants it to go out. -Na+ high concentration outside, low inside. Cell wants it to come in. -O2 high concentration outside, low inside. Cell wants it to come in. -Put cell in salt water and it shrivels -Requires clathrin or similar molecule.

In figure 4-7 why does facilitated diffusion have a maximum rate of diffusion? 

Facilitated diffusion is a metabolically inexpensive process. O True O False

Name the membrane transport mechanism that Ca2* would most likely use to diffuse across the membrane. O simple diffusion O active transport O facilitated diffusion O vesicular transport O more than one of the above

A vesicle that is created by the cell "eating" a large molecule from outside the cell is called a O endosome peroxisome phagosome lysosome

3 ...|III5I I II 6. What factor will most likely increase the rate at which diffusion occurs across a cell's plasma membrane? small concentration gradient across the plasma membrane low temperature high concentration gradient across the plasma membrane large molecule size [ת א dé tv A Aa Pro

What is an example of receptor/ligand binding? O Simple diffusion O A hormone binding to a receptor O None of these is correct Facilitated diffusion O Active transport

Item17       Item 17 Which is a passive transport process? Multiple Choice   Phagocytosis   Pinocytosis   Receptor-mediated endocytosis   Osmosis   Ion pump Item18       Item 18 The type of vesicular transport by which large molecules or large amounts of substances are secreted from a cell is _________. Fill in the blank Fill in the blank   Item19       Item 19 Materials tend to move less rapidly when their concentrations are significantly different between two compartments. Group startsTrue or False   Item19       Item20       Item 20   As potassium diffuses down its concentration gradient, it moves out of the cell. However, this movement is resisted by the accumulating negative charge outside the cell.   Group startsTrue or False