Campbell Biology
12th Edition
ISBN: 9780135188743
Author: Urry
Publisher: PEARSON
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Chapter 44.5, Problem 3CC
Summary Introduction
To identify: The major symptom of the disorder in Conn’s syndrome, leading to an increase in the production of the aldosterone from the adrenal gland.
Concept introduction: The constriction of the blood capillaries is caused by the angiotensin hormone. It causes the increase in the blood pressure inside the vessels. The adrenal gland releases the aldosterone by the action of the hormone angiotenin II. The release of the hormone aldosterone causes the reabsorption of the sodium ions and water in the collecting duct.
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. Lipid-soluble signaling molecules, such as aldosterone,cross the membranes of all cells but affect only target cellsbecause(A) only target cells retain the appropriate DNA segments.(B) intracellular receptors are present only in target cells.(C) only target cells have enzymes that break downaldosterone.(D) only in target cells is aldosterone able to initiate thephosphorylation cascade that turns genes on
6. Increasing the aldosterone secretion during prolonged muscle activity in hot
weather allows you to compensate for the sodium loss in sweat and remove
the accumulated excess of potassium. Explain these biological effects of the
hormone during exercise. For answer:
a) draw the structure of the hormone, name the precursor for its synthesis, site
of synthesis, signals for secretion, target cells;
b) draw a diagram of the hormonal signal transduction starting with hormone
interaction with the cell receptor;
WHAT IF? Lab tests of two patients, each diagnosedwith excessive thyroid hormone production, revealedelevated levels of TSH in one but not the other. Was thediagnosis of one patient necessarily incorrect? Explain.
Chapter 44 Solutions
Campbell Biology
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- 7. Mapping exercise: Create a reflex map with feedback loops for each of the following situations: a. hypercortisolism from adrenal tumor b. hypercortisolism from pituitary tumor c. hypothyroidism from hormone-secreting thyroid tumor d. hypothyroidism from the pituitary problem that decreases TSH synthesisarrow_forwardPlease answer yes or no, with a short explanation:) Are hormones of the cyclopeptide structure known? Adenylate cyclase and protein kinase systems provide multiple amplification of the hormonal signal. Aldosterone refers to glucocorticoids.arrow_forwardplease asap. thnku Which channels would open with a rise in H+ concentration outside of cells.arrow_forward
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