Chapter 11 Exam I Add All (C)

Produce lipids with hydrocarbon tails that are shorter and have more double bonds

A bacterium is suddenly expelled from a warm human intestine into the cold world outside. What might it do to maintain the same level of membrane fluidity?

Triton X-100

A mild nonionic detergent (that is, it has a nonionized but polar structure at its hydrophilic end)

Sodium Dodecyl Sulfate (SDS)

A strong ionic detergent (that is, it has an ionized group at its hydrophilic end)

one transmembrane domain

Glycoproteins & proteoglycans contribute to the carbohydrate layer on the surface of the cell. They can be secreted into the EC space & only have........

the plasma membrane is involved in import & Export of molecules

Nutrients must pass inward across the plasma membrane, & waste products must pass out. The selective channels & pumps allow specific substances to be imported & others to be exported. Thus.......

hydrophobic tails

Phospholipids are amphipathic, they have hydrophilic heads and.......

polar solvents like water

Phospholipids form bilayers only in.......

Basal

Bottom or base

smaller parts and form vesicles

Cell membranes undergo spontaneous rearrangement if torn. When they suffer non patchable large tears, the membrane will breakdown into.........

1: protein attachment to the ECM. 2: Protein attachment to the cortex within its own cell. 3: Protein restricted via diffusion barrier, with tight junction proteins.

Consider this, there are multiple different answers here

flip into the cytosol

Flippase flips phospholipids from the noncytosolic side of the phospholipid membrane into the cytosolic side. Think flippase:.........

flop out of the cytosol

Floppase flops phospholipids from the cytosolic side of the phospholipid membrane out to the noncytosolic side. Think floppase:.........

the phospholipid bilayer

Glycolipids and glycoproteins are found on the noncytosolic side of........

of the cell.

Glycolipids are located mainly in the plasma membrane and found only in the noncytosolic half of the bilayer with sugar groups facing the exterior........

recognized by lectins in endothelial cells

Glycoproteins & proteoglycans contribute to the carbohydrate layer on the surface of the cell. These sugar based molecules are..........

how quickly the bleached proteins defuse away and other fluorescent protein take their place in the bleached layer

In FRAP study, a bilayer is tagged w/ a fluorescent protein for contrast. A region of membrane proteins are photobleached (no fluorescence). Over time the bilayer is observed. The rate of diffusion is determined by........

the plasma membrane is involved in cell communication

Receptor proteins in the plasma membrane act as sensors that enable the cell to receive information about changes in its environment and respond to them. Thus.......

Cytosolic

Refers to the cytosol found inside the cell. In short cytosolic = inside the cell

the plasma membrane is involved in cell growth

The flexibility of the plasma membrane & its capacity for expansion allow cell growth and cell movement. Thus.....

composed of sugars

The head group of a glycolipid is...........

Truncation

The shortening something by removing part of it.

Apical

Tip or apex

increase fluidity of the cell membrane

Unsaturated hydrocarbon tails, short tails, and increased heat will........