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TLS Online TPP Program

#Question id: 34168

Angiotensin II stimulates aldosterone production in the zona glomerulosa by binding to AT1 receptors. Which of the following best describes the intracellular signaling pathway and its role in aldosterone biosynthesis?

#Unit 7. System Physiology – Animal
  1. AT1 activates cAMP via Gs protein, enhancing 11β-hydroxylase activity for cortisol synthesis
  2. AT1 activates adenylyl cyclase, increasing cAMP and PKA, which upregulates LDL receptor expression
  3. AT1 signals through Gq, activating phospholipase C, which increases PKC activity and promotes aldosterone synthase function
  4. AT1 signals via Gi protein to inhibit cAMP and reduce cortisol feedback, indirectly promoting aldosterone release
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TLS Online TPP Program

#Question id: 8846

#Unit 9. Diversity of Life Forms

Why are hydrocarbons insoluble in water?
TLS Online TPP Program

#Question id: 8847

#Unit 9. Diversity of Life Forms

A compound contains hydroxyl groups as its predominant functional group. Which of the following statements is true concerning this compound?
TLS Online TPP Program

#Question id: 8848

#Unit 9. Diversity of Life Forms

A carbon skeleton is covalently bonded to both an amino group and a carboxyl group. When placed in water it
TLS Online TPP Program

#Question id: 8849

#Unit 9. Diversity of Life Forms

Humans can digest starch but not cellulose because
TLS Online TPP Program

#Question id: 8850

#Unit 9. Diversity of Life Forms

Whatever its ultimate cause(s), the Cambrian explosion is a prime example of
TLS Online TPP Program

#Question id: 8851

#Unit 9. Diversity of Life Forms

Why is territoriality an adaptive behavior for songbirds maintaining populations at or near their carrying capacity?