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Membranes are based off of ______ and _______ bilayers. | phospholipid, sphingolipid |
T or F: Proteins also contain protein and cholesterol. | True |
T or F: A lower percentage of unsaturated fatty acids makes the membrane more stiff. | False |
T or F: Cholesterol present in the membrane gives more fluidity. | True |
______ and ______ make up lipid rafts. | Cholesterol, sphingolipids |
What are the three types of membrane proteins? | Integral, peripheral, lipid-anchored |
_____ membrane proteins completely span the bilayer. | Integral |
_____ membrane proteins are only on one face of the membrane. | Peripheral |
T or F: Peripheral membrane proteins are hydrophilic. | True |
T or F: Lipid-anchored proteins violate the hydrophobic in, hydrophilic out rule. | True |
Lipid anchored proteins are connected by ____ bonds. | amide or ester |
T or F: Charged molecules pass freely through the membrane. | False |
T or F: Pass transport does not require a protein carrier. | False |
Pores are ____ selective while channels are ____ selective. | weakly, highly |
What are two types of switches for gated channels? | Electrical potential or ligand |
T or F: Facilitated transport proteins can be inhbited. | True |
_____ active transport requires a form of energy. | Primary |
_____ active transport involved the active transport of one molecule coupled to the passive transport of another molecule. | Secondary |
Endocytosis | Bringing molecules from the outside in. |
Exocytosis | Sending molecules from the inside out. |
In endocytosis, the vescicle fuses with the ______ and ______. | endosome, lysozome |
Extracellular signals are considered to be _____. | first messengers |
Small molecules on the inside of cells are considered to be ______. | second messengers |
Transmembrane proteins activate ____ when a signal comes through. | G-proteins |
G-proteins are activated by ______. | GTP |
_____ is the only sensory stimuli without receptors which work via transmembrane proteins. | Hearing |
cAMP and cGMP are examples of _____. | second messengers |