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3 years ago

Heinz bodies, which may result in hemolytic anemia, can be formed by the following changes to hemoglobin EXCEPT?

Medicine

1 answer:

s2008m [1.1K]3 years ago

6 0

Answer:

C) substitutions that reduce the affinity of hemoglobin for oxygen

Explanation:

Heinz bodies are inclusions in the eritrocite, filled by denaturalized globin (protein part of the hemoglobin). Hemoglobin is formed by 4 globin subunits (2 alpha chains and 2 beta chains) plus a heme group. The latter, is responsible for oxygen binding.

The denaturalization of the globin is caused by substitutions that do not allow the protein to fold properly and bind the heme group accordingly. This is the cause of the Heinz bodies in the eritrocite. Therefore, this is a structural problem that impedes the protein to fold into a functional protein and has nothing to do with hemoglobin having less affinity for oxygen. In the last mentioned case, the protein is still functional but poorly binds oxygen, hence, does not for Heinz bodies.

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3 years ago

a nurse is caring for an infant who has been prescribed a one-time dose of ceftriaxone (rocephin) 50 mg/kg im. the infant weighs

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The nurse should administer 0.8 mL ceftriaxone IM.

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Cross multiply and x = 8 kg

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Amount prescribed x kg weight (mg x kg)

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Dose needed = Desired; Desired = 400 mg

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1 year ago

A nurse assesses a patient with a tentative diagnosis of generalized anxiety disorder. which question would be most appropriate

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