WorksheetsRespiration and Circulation
Total questions: 15
Worksheet time: 45mins
Name
Class
Date
1.
Carbon dioxide waste is transported from working cells in the body to the lungs in the form of
a)
bicarbonate ions (HCO3)
b)
oxygen (O2)
c)
dissociated carbon and oxygen
d)
glucose and water
2.
Which of the following contribute to the gas exchange in the alveoli?
I. Low Partial pressure of O2 in the pulmonary capillaries when compared with inhaled air
II. Low partial pressure of CO2 in the pulmonary capillaries when compared with inhaled air
I. Low Partial pressure of O2 in the pulmonary capillaries when compared with inhaled air
II. Low partial pressure of CO2 in the pulmonary capillaries when compared with inhaled air
a)
Both I and II
b)
Only I
c)
Only II
d)
None of these
3.
Which of the following does NOT characterize the human respiratory system?
a)
the trachea branches into two bronchi
b)
gas exchange takes place across alveolar capillary membrane
c)
contraction of the diaphragm muscle expands the thoracic cavity and permits the lungs to fill
d)
none of these
4.
Which of the following is the correct sequence of the passages through which air travels during inhalation?
a)
pharynx --> trachea --> lungs --> bronchi --> alveoli
b)
larynx --> pharynx --> bronchi --> lungs --> alveoli
c)
larynx --> pharynx --> trachea --> bronchi --> alveoli
d)
pharynx --> larynx --> trachea --> bronchi --> alveoli
5.
Which of the following is a key characteristic of maximal gas exchange for all species?
a)
humidity is more important than surface area
b)
lungs are most efficient organ for gas exchange
c)
gas exchanged is based on pressure
d)
gas exchange is a passive process
6.
Which of the following is true?
a)
deoxygenated blood is found in all veins
b)
all arteries contain oxygenated blood
c)
pulmonary arteries carry deoxygenated blood
d)
the aorta contains deoxygenated blood
7.
There are approximately ___ hemoglobin molecules in one erythrocyte.
a)
10
b)
1,000
c)
100,000
d)
1,000,000
8.
Which of the following places the organs and vessels are in the correct order for circulation?
a)
left ventricle, pulmonary vein, aorta, right atrium
b)
right ventricle, pulmonary artery, lungs, left atrium
c)
aorta, vena cava, right ventricle, tricuspid valve
d)
pulmonary vein, lungs, left ventricle, aorta
9.
Which of the following is NOT a white blood cell?
a)
leukocytes
b)
erythrocytes
c)
neutrophils
d)
monocytes
10.
Breathing in humans is usually regulated by
a)
the number of red blood cells
b)
the amount of hemoglobin in the blood
c)
inherent genetic control
d)
CO2 levels
11.
In humans, the largest amount of CO2 produced by the body cells is carried to the lungs as
a)
CO2 attached to hemoglobin in the red blood cells
b)
the bicarbonate ion dissolved in the plasma
c)
the bicarbonate ion attached to hemoglobin
d)
the CO2 gas in solution in the plasma
12.
The pacemaker of the heart is the
a)
sinoatrial node
b)
atrioventricular node
c)
diastolic node
d)
semilunar node
13.
Which is TRUE of the human circulatory system?
a)
the right ventricle of the heart has the thickest wall
b)
veins have thick walls consisting of smooth muscle cells to assist in returning blood to the heart
c)
blood flow is the slowest in capillaries to maximize the diffusion of nutrients and wastes
d)
the left and right ventricles contract alternately, which is responsible for the lub-dup sound
14.
During ventricular systole, the ____ valve(s) _____.
a)
semilunar; close
b)
semilunar; open
c)
AV; open
d)
AV and semilunar; close
15.
All of the following are true about blood EXCEPT
a)
red blood cells live for about 120 days
b)
white blood cells are formed in the bone marrow
c)
platelets are not cells but are cell fragments
d)
platelets derived from specialized cells known as neutrophils
100 %
