You observe that a neuron treated with a metabolic inhibitor which prevents ATP generation still can generate action potentials even when the cell has little ATP, but the neuron eventually loses the ability to generate action potentials
What does this tell you about the direct mechanism for regenerating the resting potential after an action potential?
What will be an ideal response?
Answer: Although the Na+/K+ ATPase pump is important for maintaining the resting potential over a long period, passive movement of ions rapidly restore the resting potential following an action potential.
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Biological membranes contain bilayers containing mostly ______
A. oils B. prostaglandins C. triglycerides D. cholesterol E. phospholipids
Ligation reactions occur most efficiently between DNA fragments:
A. that have sticky ends. B. that have blunt ends. C. that have complementary sticky ends. D. that are cleaved with different restriction enzymes. E. where one fragment has a sticky end and the other has a blunt end.
Current methodologies and understanding allow us to make precise predictions regarding the impacts of climate change on the current abundance and distribution of species
Indicate whether the statement is true or false
Regulation of the cell cycle is dependent on cyclins and cyclin-dependent kinases. The key(s) that allows a cell to progress beyond the restriction point is (are)
a. Cdk1 and cyclin B. b. cyclin D and p21. c. cyclin A and Cdk2. d. phosphorylation of RB by Cdk4 and Cdk2. e. external signals from growth factors.