Question

question 4
1 pts
erythrocytes begin their maturation sequence in red bone marrow from nucleated cells known as:
hemoglobin.
osteons.
erythroblasts.
hematopoietic stem cells.
question 5
1 pts
from which vessels do myocardial cells receive blood?
coronary veins
pulmonary arteries
venae cavae
coronary arteries
question 6
1 pts
which types of arteries are also called conducting arteries and include the aorta?
muscular arteries
elastic arteries
metarterioles
resistance arteries

Explanation:

• Question 4: Erythroblasts are nucleated cells in red bone marrow that mature into erythrocytes (red blood cells). Hemoglobin is a protein in erythrocytes, osteons are structural units of bone, and hematopoietic stem cells are more primitive cells that can differentiate into various blood cell types, not specifically the immediate nucleated precursor of erythrocytes.
• Question 5: Coronary arteries supply blood to myocardial (heart muscle) cells. Coronary veins drain blood away, pulmonary arteries carry deoxygenated blood from the heart to the lungs, and venae cavae return deoxygenated blood to the heart.
• Question 6: Elastic arteries, like the aorta, are called conducting arteries because they conduct blood away from the heart and have a large amount of elastic tissue to accommodate the pulsatile flow of blood. Muscular arteries are more involved in distributing blood to organs, metarterioles are small vessels that connect arterioles and capillaries, and resistance arteries help regulate blood pressure by adjusting their diameter.

Answer:

• Question 4: erythroblasts
• Question 5: coronary arteries
• Question 6: elastic arteries