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Ch. 16 The Endocrine System
Marieb - Human Anatomy & Physiology 11th Edition
Marieb, Hoehn11th EditionHuman Anatomy & PhysiologyISBN: 9780136874034Non è quello che usi tu?Cambia libro di testo
Tutti i libri di testoMarieb, Hoehn 11th EditionCh. 16 The Endocrine SystemProblema 1
Capitolo 16, Problema 1

The major stimulus for the release of parathyroid hormone is:
a. Hormonal
b. Humoral
c. Neural

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1
Understand the types of stimuli that can trigger hormone release: hormonal (stimulated by other hormones), humoral (stimulated by changes in blood levels of certain ions or nutrients), and neural (stimulated by nerve fibers).
Recall that parathyroid hormone (PTH) is primarily involved in regulating calcium levels in the blood.
Recognize that the release of PTH is directly influenced by the concentration of calcium ions in the blood, which is an example of a humoral stimulus.
Therefore, identify that the major stimulus for PTH release is a change in blood calcium levels, fitting the definition of a humoral stimulus.
Conclude that the correct answer corresponds to the humoral stimulus category.

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Parathyroid Hormone (PTH)

Parathyroid hormone is a peptide hormone secreted by the parathyroid glands that regulates calcium and phosphate levels in the blood. It increases blood calcium by stimulating bone resorption, enhancing calcium absorption in the intestines, and reducing calcium excretion by the kidneys.
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Review of Major Hormones

Humoral Stimulus

A humoral stimulus refers to the regulation of hormone release in response to changes in blood levels of certain ions or nutrients. For PTH, low blood calcium levels act as a humoral stimulus, triggering its secretion to restore calcium balance.
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Types of Hormonal Stimuli

Hormonal stimuli involve the release of hormones in response to other hormones, while neural stimuli involve nervous system signals. Understanding these helps differentiate how various hormones, including PTH, are regulated based on different physiological triggers.
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13:06
Review of Major Hormones
Pratica correlata
Domanda del libro di testo

A hormone not involved in glucose metabolism is:

a. Glucagon

b. Cortisone

c. Aldosterone

d. Insulin

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Domanda del libro di testo

Parathyroid hormone:

a. Increases bone formation and lowers blood calcium levels

b. Increases calcium excretion from the body

c. Decreases calcium absorption from the gut

d. Demineralizes bone and raises blood calcium levels

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Domanda del libro di testo

Choose from the following key to identify the hormones described.

Key:

a. Aldosterone

b. Antidiuretic hormone

c. Growth hormone

d. Luteinizing hormone

e. oxytocin f. prolactin

g. T₄ and T₃

h. TSH ______ 

(1) Important anabolic hormone; many of its effects mediated by IGFs ______ 

(2) Cause the kidneys to conserve water and/or salt (two choices) ______ 

(3) Stimulates milk production ______ 

(4) Tropic hormone that stimulates the gonads to secrete sex hormones ______ 

(5) Increases uterine contractions during birth ______ 

(6) Major metabolic hormone(s) of the body ______ 

(7) Causes reabsorption of sodium ions by the kidneys ______ 

(8) Tropic hormone that stimulates the thyroid gland to secrete thyroid hormone ______ 

(9) Secreted by the posterior pituitary (two choices) ______

(10) The only steroid hormone in the list

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