You Have Prepared Lipid Micelles That Possess a Leaky Na

question 49

Essay

You have prepared lipid micelles that possess a leaky Na+ ion channel,and,for purposes of experimentation,the cytosolic sides of the channels are facing outward. Predict what will happen with the Na⁺ ion movement and the probable impact on the development of an action potential across the micelle membrane if (a)there were an equivalent amounts of Na⁺ ions on both sides of the membrane,(b)a greater Na⁺ ion concentration inside the micelle,and (c)a greater concentration of Na⁺ ions outside the micelle.

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Definitions:

Pancreas

The pancreas is a glandular organ in the digestive system and endocrine system of vertebrates. It produces enzymes that aid in digestion and hormones such as insulin, which regulates blood sugar.

Ghrelin

A peptide hormone that stimulates appetite; secreted by the stomach

Vermiform Appendix

A small, tube-shaped appendage attached to the large intestine, historically considered vestigial but now recognized for its role in the immune system.

Ileum

The final and longest segment of the small intestine in most higher vertebrates, including humans, where further digestion and absorption of nutrients occur.