1.
Oxygen moves easily out of blood capillaries into cells because ___________. (1 point)
the walls are very thin
because it is very small
because other gases push it out
cells need the oxygen
2.
Which of the following statements is false? (1 point)
Arteries carry blood away from the heart.
Veins carry blood back to the heart.
Capillaries and arteries are similar in size.
Blood travels from arteries to capillaries.
3.
The blood is transported to the left side of the heart from the ________ through the ___________ . (1 point)
lungs; aorta
body; pulmonary artery
body; vena cava
lungs; pulmonary vein
4.
______________ takes blood from the heart to the lungs and back again, while ____________ takes blood to and from tissues of the heart. (1 point)
Systemic circulation; coronary circulation
Pulmonary circulation; coronary circulation
Coronary circulation; systemic circulation
Systemic circulation; pulmonary circulation
5.
Blood is transported to the lungs through the __________ to collect __________ and remove _____________ . (1 point)
vena cava; carbon dioxide; oxygen
pulmonary artery; oxygen; carbon dioxide
pulmonary vein; nitrogen; oxygen
aorta; gas; water
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1. The correct answer is "the walls are very thin." Oxygen moves easily out of blood capillaries into cells because the walls of the capillaries are very thin. This allows for efficient diffusion of oxygen from the bloodstream into the surrounding cells.
2. The false statement is "Capillaries and arteries are similar in size." Capillaries and arteries are not similar in size. Capillaries are the smallest blood vessels, while arteries are larger and carry blood away from the heart.
3. The blood is transported to the left side of the heart from the lungs through the pulmonary vein. The pulmonary vein carries oxygenated blood from the lungs to the left atrium of the heart.
4. Pulmonary circulation takes blood from the heart to the lungs and back again, while systemic circulation takes blood to and from tissues of the body. Pulmonary circulation is responsible for supplying oxygen to the blood and removing carbon dioxide, while systemic circulation delivers oxygenated blood to the tissues and removes waste products.
5. Blood is transported to the lungs through the pulmonary artery to collect oxygen and remove carbon dioxide. The pulmonary artery carries deoxygenated blood from the right ventricle of the heart to the lungs, where it picks up oxygen and releases carbon dioxide. The oxygenated blood is then returned to the heart through the pulmonary vein.