Membrane curvature is influenced by the differential lipid composition of the two membrane monolayers
Which factor do you think has the largest impact on the curvature of biological membranes?
(a) amount of cholesterol
(b) charge of the lipid head group
(c) length of the hydrocarbon tails
(d) size of the lipid head group
11-26
Glycolipids are found on the surface of healthy cells, and contribute to the cell's defense against chemical damage and infectious agents.
A. In which organelle are sugar groups added to membrane lipids?
B. By what mechanism are glycolipids transported to the plasma membrane and presented to the extracellular environment?
Draw a diagram to support your answer to part B.
Membrane Proteins
(d)
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Which organisms would most likely be present on the bottom or closest to the actual surface of a complex microbial biofilm?
A. Facultative chemoorganotrophs B. Anaerobic sulfate-reducing bacteria C. Eukaryotic protists D. Cyanobacteria
If a woman who is a carrier for hemophilia (sex-linked recessive disorder) marries a man with hemophilia, what percentage of offspring would be affected by this condition?
a. 0% b. 50% c. 75% d. 100%
What would happen if your SA node and AV node fired at same time?
A. The QRS wave on an ECG would disappear, as it would be masked by the P wave. B. Your blood pressure would increase. C. The production of nitric oxide by your endothelial cells would increase. D. Blood would be forced back into the atria from the ventricles. E. Your stroke volume would decrease. Clarify Question What is the key concept addressed by the question? What type of thinking is required? Gather Content What do you already know about the SA and AV nodes? What other information is related to the question? Choose Answer Given what you now know, what information is most likely to produce the correct answer? Reflect on Process Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
The biceps brachii is responsible for flexing the forearm while the triceps brachii extends the forearm. Muscles with such opposite actions are called
a. cooperative. b. antagonistic. c. involuntary. d. sensory.