A new compound synthesized in the lab acts on adrenergic receptors, which are ta

Question

A new compound synthesized in the lab acts on adrenergic receptors, which are targets of epinephrine. In the presence of this compound, amylase production ceases. Which of the following would best describe the results/site of action of this compound? A) Increased levels of agonist B) Increases in cAMP C) Decreases in fluid secretion D) alpha - epinephrine antagonist receptor E) beta-epinephrine antagonist receptor When the output of a __________ is detected by a sensor and leads to more output, this is called _________. A) sensor, positive feedback B) controller: redundancy C) sensor, negative feedback D) controller: positive feedback E) sensor: homeostasis A new compound is created in the lab that acts as an antagonist to the acetylcholine nicotinic receptor and also degrades acetylcholine. This new compound has properties of A) serotonin and acetylcholinesterase B) atropine and acetylcholinesterase C) SSRI's and curare D) curare and acetylcholinesterase E) atropine and curare Using the cAMP pathway, which of the following would be the result of a depletion in intracellular ATP? A) Decreased G-protein activity B) Increased production of AMP C) Decreased phosphorylation of intracellular proteins D) Increased activity of adenylate cyclase E) Increased activity of phosphoprotein phosphatase

Explanation / Answer

1. The fourth option (D) is correct. Amylase production by epinephrine transmission involves the adrenergic receptors. The high cAMP concentration activates high amylase production through b-receptors by nor-epinephrine. Therefore, the D is correct option.

2. Yes, this is true. The correct option is D.

3. The fourth option D is correct. Curare is a nicotinic antagonist and blocks acetylcholine competitively while acetylcholinesterase degrades acetylcholine. SSRI is serotonine blockers.

4. The correct option is D. cAMP pathways activate by adenylate cyclase, in which AMP produces by ATP. Therefore, if a cell has depleted levels of ATP, it means higher concentration of adenylate cyclase.

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