Why is iron not stored or transported in its free form? In what form(s) is it stored or transported in blood?
What will be an ideal response
Because free iron is toxic to body cells, iron is stored within cells as protein-iron complexes such as ferritin and hemosiderin. It is transported loosely bound to a protein called transferrin.
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Intercostal nerves
a) are also known as cervical nerves. b) do not enter into a plexus and directly connect to the structures they supply. c) are found in the C6-T4 area of the vertebral column. d) extend through the sacrum. e) do not exist in humans.
Which vessel branches off from the aortic arch?
A) Right subclavian artery B) Right coronary artery C) Left coronary artery D) Left subclavian artery
The chemical bonding behavior of an atom is directly determined by
A) the size of the atom. B) the number and arrangement of electrons. C) the mass of the atom. D) the number of protons. E) the number of neutrons.
Label E represents the
A) common iliac vein.
B) inferior vena cava.
C) azygous vein.
D) descending aorta.
E) celiac trunk.