Question

The human heart has four chambers (two atria and two ventricles). In rare cases, a child is born with a heart that has only one functional ventricle. Children with a single ventricle defect cannot survive without surgical intervention. Answer the following sub-questions separately. 1) What is the most likely symptom of single ventricle defects? (1 mark) 2) Briefly explain why this symptom occurs. (1 mark) 3) How many chambers does the reptile usually have? (0.5 mark) 4) How many chambers does the bird usually have? (0.5 mark) 5) The Chinese giant salamander, the largest amphibian in the world, can grow over 1.5m and over 25 kg; it has a three-chambered heart (two atria and one ventricle). The whale shark, the largest fish in the word has a two-chambered heart (one atrium and one ventricle). Generally, these animals are much larger than human infants. Generate your own hypothesis and explain why the human requires a four-chambered heart (two atria and two ventricles). (4 marks) 6) Fish uses gills for respiration. The gills, the heart and the other organs are connected in series (A). A possible surgical treatment for single ventricle defects is to connect the lung and the other organs together in series (B) like the fish circulatory system. However, this does not work. Briefly discuss the reason. (3 marks)

          The human heart has four chambers (two atria and two
ventricles). In rare cases, a child is born with a heart that has
only one functional ventricle. Children with a single ventricle
defect cannot survive without surgical intervention. Answer the
following sub-questions separately.
1) What is the most likely symptom of single ventricle defects?
(1 mark) 2) Briefly explain why this symptom occurs. (1 mark) 3)
How many chambers does the reptile usually have? (0.5 mark) 4) How
many chambers does the bird usually have? (0.5 mark) 5) The Chinese
giant salamander, the largest amphibian in the world, can grow over
1.5m and over 25 kg; it has a three-chambered heart (two atria and
one ventricle). The whale shark, the largest fish in the word has a
two-chambered heart (one atrium and one ventricle). Generally,
these animals are much larger than human infants. Generate your own
hypothesis and explain why the human requires a four-chambered
heart (two atria and two ventricles). (4 marks) 6) Fish uses gills
for respiration. The gills, the heart and the other organs are
connected in series (A). A possible surgical treatment for single
ventricle defects is to connect the lung and the other organs
together in series (B) like the fish circulatory system. However,
this does not work. Briefly discuss the reason. (3 marks)

Added by James M.

Question

Please give Ace some feedback