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How is iron stored in the liver as consequence of the recycling of the hemoglobin components?

A.

Ferritin

B.

Transferrin

C.

Hemosiderosis

D.

Ferrin

Answer and Explanation

The Correct Answer is A

a) Ferritin: Ferritin is a protein complex that stores iron in the liver, releasing it when needed.

b) Transferrin: Transferrin is the transport protein that carries iron in the blood, not a storage form.

c) Hemosiderosis: This is a pathological condition caused by excess iron deposition in tissues, not a normal storage mechanism.

d) Ferrin: “Ferrin” is not a physiologically recognized iron storage molecule.


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Related Questions

Correct Answer is B

Explanation

a) Is the vascular connection between the anterior pituitary and the hypothalamus: This describes the hypophyseal portal system, not the tract.

b) Is the neural connection between the hypothalamus and the neurohypophysis (posterior pituitary): The hypothalamic-hypophyseal tract consists of axons that transport oxytocin and ADH from the hypothalamus to the posterior pituitary for storage and release.

c) Conducts aldosterone to the hypophysis: Aldosterone is produced by the adrenal cortex and is not transported by this tract.

d) Is the site of prolactin synthesis: Prolactin is synthesized in the anterior pituitary, not in the hypothalamic-hypophyseal tract.

Correct Answer is C

Explanation

a) Hypercalcemia: High calcium levels inhibit PTH secretion via negative feedback.

b) Cold temperatures: PTH release is not influenced by ambient temperature.

c) Hypocalcemia: Low calcium levels stimulate the parathyroid glands to release PTH to increase calcium concentration.

d) Low basal metabolic rate: This relates more to thyroid hormone activity than to calcium regulation.

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