Test on Blood Vessels: Structure and Function
Blood Vessels: Structure and Function for Students
Test: Blood Vessels and Circulation
20 questions
Question 1: Capillary walls are typically two cells thick to facilitate the exchange of materials.
A. Ano
B. Ne
Explanation: Capillary walls are usually only one cell thick, which increases the rate of diffusion by decreasing the distance over which exchange occurs.
Question 2: The rate of blood flow is calculated by dividing the volume of blood by the number of minutes.
A. Ano
B. Ne
Explanation: The example calculation for the rate of blood flow uses the formula: 1464 ml ÷ 4.5 minutes = 325 ml/min, which demonstrates division of the volume of blood by the number of minutes to find the rate.
Question 3: Veins do not have valves to help keep the blood flowing in the right direction.
A. Ano
B. Ne
Explanation: Veins have valves to help keep the blood flowing in the right direction.
Question 4: Capillaries are really tiny and carry blood really close to every cell in the body.
A. Ano
B. Ne
Explanation: The study materials state that capillaries are 'really tiny — too small to see' and that 'They carry the blood really close to every cell in the body to exchange substances with them.'
Question 5: Capillary walls are typically two cells thick, which helps decrease the distance over which diffusion occurs.
A. Ano
B. Ne
Explanation: The study materials state that capillary walls are usually only one cell thick. This thickness increases the rate of diffusion by decreasing the distance over which it occurs.