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Worksheets8.2 THE VASCULAR SYSTEM AND BLOOD FLOW
Total questions: 25
Worksheet time: 13mins
Name
Class
Date
1.
What is the main function of the vascular system?
a)
To transport blood
b)
To digest food
c)
To filter waste products
d)
To produce hormones
2.
What is the name of the thin layer of cells that lines the inside of all vessels in the vascular system?
a)
Endothelium
b)
Myocardium
c)
Pericardium
d)
Epithelium
3.
What is the main difference between arteries and arterioles?
a)
Arteries have thinner walls than arterioles
b)
Arteries carry oxygenated blood, while arterioles carry deoxygenated blood
c)
Arteries are larger in diameter than arterioles
d)
Arteries have no smooth muscle, while arterioles do
4.
What is the main function of arterioles?
a)
To carry blood away from the heart
b)
To regulate blood distribution to the various tissues of the body
c)
To exchange gases and nutrients with the tissues
d)
To return blood to the heart
5.
What controls the rings of smooth muscle in arterioles?
a)
Only the nervous system
b)
Only local chemical factors released by the tissues
c)
Both the nervous system and local chemical factors released by the tissues
d)
Neither the nervous system nor local chemical factors released by the tissues
6.
During exercise, which of the following would happen to the arterioles that supply the muscles involved in the exercise?
a)
They would be constricted
b)
They would be relaxed
c)
They would not be affected
d)
They would be blocked completely
7.
What is autoregulation?
a)
The process of the heart pumping blood
b)
The process of the lungs oxygenating blood
c)
The effects of locally produced chemical compounds on blood flow
d)
The process of removing waste products from the blood
8.
What is the main function of capillaries?
a)
To carry blood away from the heart
b)
To regulate blood distribution to the various tissues of the body
c)
To exchange gases and nutrients with the tissues
d)
To return blood to the heart
9.
What is the name of the process that occurs in the capillaries and is responsible for the exchange of gases and nutrients with the tissues?
a)
Active transport
b)
Diffusion
c)
Osmosis
d)
Filtration
10.
How thick are the walls of capillaries?
a)
Very thick
b)
Moderately thick
c)
One cell thick
d)
Two cells thick
11.
What is the main function of venules and veins?
a)
To carry blood away from the heart
b)
To regulate blood distribution to the various tissues of the body
c)
To exchange gases and nutrients with the tissues
d)
To return blood to the heart
12.
What is the name of the vessel that drains the venous blood into the right atrium of the heart?
a)
Pulmonary artery
b)
Pulmonary vein
c)
Superior vena cava
d)
Inferior vena cava
13.
What is the name of the compound that is probably the most potent stimulator of blood flow produced in skeletal muscle?
a)
Carbon dioxide
b)
Nitrogen
c)
Oxygen
d)
Nitric oxide
14.
What is the common feature shared by all types of vessels in the vascular system?
a)
Rings of smooth muscle
b)
One cell thick walls
c)
A thin layer of cells lining the inside of the vessels
d)
Elastic walls
15.
What is the function of arteries?
a)
To carry oxygen-rich blood away from the heart
b)
To carry deoxygenated blood away from the heart
c)
To carry oxygen-rich blood to the lungs for oxygenation
d)
To carry deoxygenated blood to the lungs for oxygenation
16.
What causes systolic blood pressure in the arteries?
a)
The recoil of the arteries during diastole
b)
The contraction of the heart
c)
The relaxation of the heart
d)
The opening of the arterioles
17.
What is the function of the arterioles?
a)
To carry blood away from the heart to the different tissues
b)
To regulate blood distribution to the various tissues of the body
c)
To exchange gases and nutrients with the tissues
d)
To return blood to the heart for another trip throughout the vascular system
18.
How are the arterioles controlled?
a)
By the central nervous system only
b)
By local chemical factors only
c)
By both the central nervous system and local chemical factors
d)
By the blood pressure
19.
What is autoregulation?
a)
The process of nerves interacting directly with the arterioles
b)
The process of locally produced chemical compounds influencing blood flow
c)
The process of capillaries exchanging gases and nutrients with the tissues
d)
The process of veins returning blood to the heart for another trip throughout the vascular system
20.
What is the main function of the capillaries?
a)
To carry blood away from the heart to the different tissues
b)
To regulate blood distribution to the various tissues of the body
c)
To exchange gases and nutrients with the tissues
d)
To return blood to the heart for another trip throughout the vascular system
21.
How does the transfer of gases and nutrients from the blood to the tissues occur in the capillaries?
a)
Through osmosis
b)
Through active transport
c)
Through diffusion
d)
Through facilitated diffusion
22.
What happens to blood once it travels through the capillaries?
a)
It enters the venules
b)
It enters the arteries
c)
It returns to the heart for another trip throughout the vascular system
d)
It enters the arterioles
23.
What is the function of the venules?
a)
To carry blood away from the heart to the different tissues
b)
To regulate blood distribution to the various tissues of the body
c)
To exchange gases and nutrients with the tissues
d)
To lead blood into veins
24.
What do the walls of the veins contain?
a)
Rings of smooth muscle
b)
One cell thick walls
c)
A thin layer of cells lining the inside of the vessels
d)
Smooth muscle
25.
What allows the veins to dilate and contract?
a)
The contraction of the heart
b)
The opening of the arterioles
c)
The recoil of the arteries during diastole
d)
The smooth muscle in the walls of the veins
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