1) Be able to explain the role of hemoglobin for oxygen and carbon dioxide trans

Question

1) Be able to explain the role of hemoglobin for oxygen and carbon dioxide transport in the blood stream

2) Be able to describe the major blood vessels that supply and removes blood from the heart itself

3) Be able to state that both ventricles pump about the same amount of blood

4) Be able to explain the control mechanism for the heart valve

5) Be able to outline and explain the steps involved for the contraction and recovery of a single skeletal muscle contraction (i.e. sliding filament model) as displayed on Blackboard

6) Be able to define intercalated disc

7) Be able to define the term diapedesis

21) Be able to describe the histological differences between neutrophils, basophils, eosinophils, lymphocytes, and monocytes

Explanation / Answer

1. Hemoglobin is compose of 4 subunits. Each unit contains a central heme group that contain iron and bind one oxygen molecule and thus 1 hemoglobin molecule binds with 4 oxygen molecule and carry these oxygen molecule from lung to the tissue. Carbodioxide molecule has the ability to attach the hemoglobin meolecule reversibly. Once bind with hemoglobin it reaches to the lungs and dissociate from hemoglobin and expelled out through expiration.

2. Coronary artery supplies pure blood to the heart and coronary vein removes impure blood from the heart.

3. Yes, both ventricle pumps about the same amount of blood. Left ventricle receive pure blood from left atrium and pumps blood to the body through aorta. Right ventricle recieves impure blood from right atrium and pumps this impure blood to lungs for purification.

4. The opening and closing functions of the valves are controlled by pressure differences generated within the heart, as well as some muscles (like papillary muscle) located within the heart.

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