SCI9 - RC - CIRCULATORY SYSTEM

What component of the blood is primarily responsible for transporting most of the dissolved substances?

• plasma

• platelets

• RBC

• WBC

Which of the following element serves as the core of the hemoglobin pigment of the red blood cells?

• iron

• zinc

• nickel

• copper

Which of the following substances should not be transported by the blood towards the different systems of the body?

• toxins

• proteins

• sugar

• lipids

During the development of red blood cells, the cell nucleus is removed. What could be the reason for the removal of the nucleus of the red blood cells during development?

• to allow for more space for nutrients in the RBC

• to become circle in shape

• to easily flow in the blood vessels

• to allow RBC to become red in color

The shape of the red blood cells is in discoidal form. It also has an indention in the center. What could be the best explanation for this structure of the red blood cells?

• for faster transport in blood vessels

• for removing nucleus

• for high amount of hemoglobin

• for differentiation with WBC

Which of the following best explains the function of pulmonary circulation?

• It leads blood to the lungs to be filled with oxygen.

• It leads blood to the lungs to remove oxygen.

• It leads blood to the rest of the body to distribute oxygen.

• It leads blood to the rest of the body to get rid of carbon dioxide.

Which of the following best explains the function of systemic circulation?

• It leads blood to the rest of the body to distribute oxygen.

• It leads blood to the lungs to be filled with oxygen.

• It leads blood to the lungs to remove oxygen.

• It leads blood to the rest of the body to get rid of carbon dioxide.

What part of the heart could be malfunctioning if the lowest parts of the body failed to receive proper blood supply?

• left ventricle

• right ventricle

• left atrium

• right atrium

Blood is flowing on the right ventricle, where will it proceed next?

• pulmonary artery

• pulmonary vein

• right atrium

• left ventricle

Blood is flowing from the lower parts of the body, where will it proceed next to enter the heart?

• inferior vena cava

• superior vena cava

• aorta

• pulmonary vein