A 2-week-old boy is brought to the physician because of persistent cyanosis. Hemoglobin concentration and erythrocyte morphology are normal. An x-ray of the chest and an echocardiogram disclose no abnormalities. Which of the following is the most likely cause of the cyanosis? A) Hemolytic anemia B) Megaloblastic anemia C Methemoglobinemia D) a-Thalassemia E) B-Thalassemia
Added by The Real E.
Step 1
In this case, the cyanosis is not due to a problem with the heart (as evidenced by the normal echocardiogram) or the lungs (as evidenced by the normal chest x-ray). The hemoglobin concentration and erythrocyte morphology are also normal, ruling out anemia as a Show more…
Show all steps
Your feedback will help us improve your experience
Tracy Lin and 78 other Biology educators are ready to help you.
Ask a new question
Labs
Want to see this concept in action?
Explore this concept interactively to see how it behaves as you change inputs.
Key Concepts
Recommended Videos
The normal values for forms of hemoglobin found in an infant under the age of one year are 90-95% hemoglobin F; up to 5% hemoglobin A1. Over the age of one year, the values are 90-95% hemoglobin A1; up to 2% Hgb F; up to 3% Hgb A2. Are they the same, why? If they are different, why? List four causes of a hyperplastic marrow. What would you expect to see on microscopic examination of a stained blood smear if the patient has had a splenectomy and why?
Supreeta N.
A 12-year-old boy is suffering from an autosomal recessive inherited disease: His hemoglobin lacks a beta-globin chain. Which of the following treatments should be considered for this patient? I. Supplements II. Hydroxyurea III. Normal saline infusion IV. Blood transfusions
Madhur L.
A 6-week-old girl is brought to the physician by her mother because of a 6-day history of vomiting a small amount of milk 2 to 3 times daily. She appears well. She is at the 50th percentile for length and weight. Physical examination shows no abnormalities. Which of the following is the most likely cause of this patient's findings? A) Esophageal spasm B) Gut malrotation C) Immature lower esophageal sphincter D) Neuromuscular abnormality of the esophagus E) Pyloric stenosis F) Tracheoesophageal fistula
Lauren L.
Recommended Textbooks
Biology for AP Courses
Objective Biology for NEET
Introduction to General, Organic and Biochemistry
Transcript
18,000,000+
Students on Numerade
Trusted by students at 8,000+ universities
Watch the video solution with this free unlock.
EMAIL
PASSWORD