Cell signaling Question 18 options: a. Upon activation by insulin, the insulin receptor directly phosphorylates substrate proteins. b. Epinephrine can cause either vasodilation or vasoconstriction, depending on the specific type of adrenergic receptor that it activates. c. Alpha-bungarotoxin is a snake toxin that specifically targets the nicotinic acetylcholine receptor. d. Both a) and b) are correct and c) is incorrect e. Statements a), b) and c) are all correct
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" - This statement is correct. Upon activation, the insulin receptor, which is a tyrosine kinase receptor, phosphorylates itself and then phosphorylates other substrate proteins, initiating a signaling cascade. Show more…
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Which of the following statements about the insulin receptor is FALSE? a. Insulin binds to the extracellular region of the receptor b. Once activated, the intracellular part of the insulin receptor transfers phosphate groups (obtained from ATP) to target molecules, such as enzymes involved in the cell's response to insulin c. The insulin receptor is classified as a protein kinase receptor d. The cell's final response to insulin is to release glucose into the bloodstream and raise blood sugar levels.
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1.7 Which of the following is true about signaling molecule receptors? a. They all work through kinases. b. They are never found in white blood cells, C. They are found embedded in the surface, or in organelles within the cell. d. They all work by opening ion channels. and. They are found inserted only in the plasma membrane. 1.8 Which of the following molecules is directly associated with determining compatibility between a donor and an individual organ transplant recipient? a. BCR b. Toll-like receptors C. MHC molecule d. Complement proteins 1.9 MHC class I genes code for antigen presenting cell (APC) membrane membrane proteins. A. True B. False
Choose the TRUE statement about insulin signaling. There is one correct answer. The sympathetic nervous system acts on the pancreas to raise insulin secretion High levels of insulin in the blood cause protein to be broken down to amino acids. Injection of an agonist of insulin receptors will tend to lower blood glucose Destruction of the pancreatic beta cells will tend to lower blood glucose
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