Blood pressure is highest in the
Correct answer: C. aorta
- A. capillaries
- B. venules
- C. aorta
- D. venae cavae
Explanation
Pressure is greatest as blood leaves the left ventricle into the aorta and falls steadily along the circuit, with the sharpest drop across the arterioles and capillaries because of their resistance and their vast combined cross sectional area. By the time blood reaches the venae cavae the pressure is close to zero. This falling gradient is what keeps blood flowing in one direction.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? support@testustad.com
About Blood Vessels
Blood vessels include arteries, arterioles, capillaries, venules and veins, whose wall thickness, elasticity, lumen size and valves suit their roles in circulation. Questions compare pressure and blood flow in each vessel and distinguish pulmonary vessels, which carry blood to and from the lungs, from systemic vessels.
Practise Circulation
695 free Circulation MCQs from Biology, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Biology questions like this
Biology is on 8 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Blood Vessels questions
Exchange of materials between blood and tissues occurs only in capillaries because their walls are
Valves are present in veins but not in arteries because
Which vessel carries oxygenated blood despite being called a vein?
A normal resting blood pressure for a young adult is recorded as
The hepatic portal vein is unusual because it
The left ventricle pumps blood to the