« previous next »

Author Question: What is the main site for iron storage in the bone marrow? a. Stem cells b. Transferrin ... (Read 90 times)

Charlie

  • Hero Member
  • *****
  • Posts: 640
on: Jun 25, 2018
What is the main site for iron storage in the bone marrow?
 
  a. Stem cells
  b. Transferrin molecules
  c. Endothelial cells
  d. Macrophages

Question 2

What stimulates production of erythropoietin?
 
  a. Decreased red cell number in the bone marrow
  b. Increased peripheral red cell number
  c. Decreased iron stores
  d. Decreased oxygen level in tissue


Mollythedog

  • Sr. Member
  • ****
  • Posts: 340
Reply #1 on: Jun 25, 2018
Answer to Question 1

ANS: D
Macrophages are the primary site for storage of iron in the bone marrow. Stem cells of various kinds are precursors to blood cells. Transferrin is the protein that binds and transports iron to either storage or developing red blood cells (RBCs). Endothelial cells are the lining cells of the bone marrow and blood vessels.

Answer to Question 2

ANS: D
Peritubular cells in the kidney detect too little oxygen in tissue (also called hypoxia). They then synthesize erythropoietin. This increases red cell production in the bone marrow, unless the marrow is unable to respond to respond to the erythropoietin stimulus.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

When intravenous medications are involved in adverse drug events, their harmful effects may occur more rapidly, and be more severe than errors with oral medications. This is due to the direct administration into the bloodstream.

Did you know?

ACTH levels are normally highest in the early morning (between 6 and 8 A.M.) and lowest in the evening (between 6 and 11 P.M.). Therefore, a doctor who suspects abnormal levels looks for low ACTH in the morning and high ACTH in the evening.

Did you know?

Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.

Did you know?

Giardia is one of the most common intestinal parasites worldwide, and infects up to 20% of the world population, mostly in poorer countries with inadequate sanitation. Infections are most common in children, though chronic Giardia is more common in adults.

Did you know?

HIV testing reach is still limited. An estimated 40% of people with HIV (more than 14 million) remain undiagnosed and do not know their infection status.

The carbon cycle. Numbers are storage as 1015 g or fluxes as 1015 g per year (data from Schlesinger The carbon cycle. Numbers are storage as 1015 g or fluxes as 1015 g per year (data from Schlesinger
Atherosclerosis. (a) A sectioned coronary artery that exhibits an accumulation of fatty plaque, whic Atherosclerosis. (a) A sectioned coronary artery that exhibits an accumulation of fatty plaque, whic
BLOOD CELLS BLOOD CELLS
Endochondral ossification of long bone. Endochondral ossification of long bone.
Fracture and Repair of Bone - Comminuted Fracture and Repair of Bone - Comminuted
Superior view of sphenoid bone in floor of cranium Superior view of sphenoid bone in floor of cranium
Video: Pericarditis

For a complete list of videos, visit our video library