« previous next »

Author Question: The proportion of hemosiderin to ferritin increases when: a. Iron stores increase. b. Anemia is ... (Read 71 times)

mrsjacobs44

  • Hero Member
  • *****
  • Posts: 500
on: Jun 25, 2018
The proportion of hemosiderin to ferritin increases when:
 
  a. Iron stores increase.
  b. Anemia is present.
  c. Transferrin increases.
  d. Erythropoietin increases.

Question 2

Which of the following is true for transferrin?
 
  a. It can bind two molecules of ferrous iron.
  b. It binds to a transferrin receptor found on the cell membrane.
  c. It is synthesized in the kidney.
  d. It is normally about 50 saturated with iron.


recede

  • Sr. Member
  • ****
  • Posts: 315
Reply #1 on: Jun 25, 2018
Answer to Question 1

ANS: A
Normally most of the stored iron is in the ferritin or soluble form. However, when iron stores increase, so does the proportion of hemosiderin to ferritin.

Answer to Question 2

ANS: B
Transferrin binds to receptors on the cell membrane, which are called transferrin receptors. Transferrin has two binding sites for ferric (trivalent) iron; it does not bind ferrous iron. It is synthesized in the liver and is normally about one third saturated.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

On average, the stomach produces 2 L of hydrochloric acid per day.

Did you know?

Pope Sylvester II tried to introduce Arabic numbers into Europe between the years 999 and 1003, but their use did not catch on for a few more centuries, and Roman numerals continued to be the primary number system.

Did you know?

In Eastern Europe and Russia, interferon is administered intranasally in varied doses for the common cold and influenza. It is claimed that this treatment can lower the risk of infection by as much as 60–70%.

Did you know?

In 2006, a generic antinausea drug named ondansetron was approved. It is used to stop nausea and vomiting associated with surgery, chemotherapy, and radiation therapy.

Did you know?

Certain topical medications such as clotrimazole and betamethasone are not approved for use in children younger than 12 years of age. They must be used very cautiously, as directed by a doctor, to treat any child. Children have a much greater response to topical steroid medications.

Sickle-cell anemia. Sickle-cell anemia.
In Charles Russell’s Trail of the Iron Horse (1910) steel rails stretch nearly to the sun while wisp In Charles Russell’s Trail of the Iron Horse (1910) steel rails stretch nearly to the sun while wisp
When using forearm pressure on the top of the shoulder, push with your back foot to increase your ... When using forearm pressure on the top of the shoulder, push with your back foot to increase your ...
The averaging of an auditory evoked potential. Averaging increases the signal-to-noise ratio. The averaging of an auditory evoked potential. Averaging increases the signal-to-noise ratio.
Effect of an Increase in Technological Progress Effect of an Increase in Technological Progress
Factors that Increase Cardiac Output Factors that Increase Cardiac Output
Video: Type of Cell Junctions - Desmosome, Hemidesmosomes and Gap Junctions

For a complete list of videos, visit our video library