Question

question 28
1 pts
blood flow from the heart through blood vessels to all parts of the body and back to the heart is referred to as ______ circulation.
pulmonary
systemic
full
cardiac
question 29
1 pts
the molecule that makes up 95% of the dry weight of each red blood cell and is responsible for the red pigment is
spectrin.
erythropoietin.
hemoglobin.
erythroblast.
question 30
1 pts
the heart valves that are located where the trunk of the pulmonary artery joins the right ventricle and where the aorta joins the left ventricle are called
semilunar valves.
atrioventricular valves.
venous valves.
cuspid valves.

Explanation:

• Question 28: Systemic circulation refers to the blood flow from the heart through blood vessels to all parts of the body and back to the heart. Pulmonary circulation is specifically between the heart and lungs. "Full" and "cardiac" are not standard terms for this type of circulation.
• Question 29: Hemoglobin makes up about 95% of the dry weight of a red blood cell and gives it its red color. Spectrin is a structural protein in red blood cells, erythropoietin is a hormone that stimulates red blood cell production, and erythroblast is an immature red blood cell.
• Question 30: Semilunar valves are located where the pulmonary artery joins the right ventricle (pulmonary semilunar valve) and where the aorta joins the left ventricle (aortic semilunar valve). Atrioventricular valves (mitral and tricuspid) are between atria and ventricles. Venous valves are in veins, and cuspid valves is a less - specific term (atrioventricular valves can also be called cuspid valves in some contexts, but not in this specific anatomical location).

Answer:

• Question 28: systemic
• Question 29: hemoglobin
• Question 30: semilunar valves