Name:
Body Systems worksheet 2:
Digestive, circulatory, and
respiratory system practice wsh.
Grade 10
HSD
Date:
Blood flow through the heart — Science Learning Hub
Use the attached link to study the fow of blood through the body, and then answer
questions 1-4.
____1. Deoxygenated blood from the legs and
abdomen is returned to the heart through
structure:
A. 11
B. 1
C. 12
D. 9
E. 5
____2. The structure that carries highly oxygenated blood from one lung to the heart is:
A. 5
B. 1
C. 10
D. 12
E. 2
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___3. Contractions of which structure carries blood through the pulmonary arteries to the
lung?
A. 2
B. 7
C. 4
D. 9
E. 10
___4. The vessel with thick walls and many branches that distribute oxygenated blood to the
body organs is:
A. 5
B. 3
C. 10
D. 1
E. 12
___5. Measurements that are normal for an average adult at rest are:
I) Body temperature of 37°C.
II) Systolic pressure of 180 mm of mercury.
III) Heart rate of 60-80 beats per minute.
A. I only.
B. II only.
C. I and II only
D. I and III only
E. I, II, and III.
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___6. In which of the following the concentration of carbon dioxide is the lowest?
A. 3
B. 2
C. 10
D. 7
E. 9
___7. Blood vessel has thick muscular has thick muscular walls, this blood vessel is:
I) an artery
II) Carries oxygenated blood
III) Carries blood away from the heart.
A) I only
B) III only
C) I and II only
D) I, II and III
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Look at the digestive system diagram, and then answer the following questions.
____1. Structure 7 pushes food to the stomach through
successive wave of smooth muscle contractions called:
a) Peristaltic contractions
b) Hiccup contractions
c) Diastolic contractions
d) Hepatic contractions
____2. The majority of digestion and absorption occurs in
structure:
A. 2
B. 8
C. 9
D. 10
E. 4
_____3. Bile plays an important role in the digestion process because it:
A. chemically digests starches that would otherwise be eliminated as waste.
B. controls E.coli activity in the large intestine.
C. emulsifies fat globules to increase surface area of eventual chemical digestion.
D. protects gallbladder from infection
E. enhances the absorption power of the villi.
___4. Excessive acid in the stomach can result in a hole in the wall of the organ. What is this
hole called?
A. Tumor
B. Cancer
C. Boil
D. ulcer
E. Hemorrhoid
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____5. Structure 6 secretes:
A. proteases to break down proteins.
B. salivary amylase to breakdown carbohydrates
C. emulsifies to breakdown fats
D. proteases to breakdown carbohydrates
___6. Which structure has the lowest PH?
A. 7
B. 8
C. 10
D. 11
___7. In human digestive system, the principal role of the colon is :
A. Digests fa
B. secretes bile, which emulsifies fat
C. supply enzymes that complete cellulose digestion
D. absorbs most of water from undigested material
E. Inhibit the bacterial digestion of solid waste
___8. In humans, proteins are digested by enzymes secreted into the:
A. Mouth and stomach
B. stomach and small intestine
C. mouth and small intestine
D. stomach and large intestine
E. small intestine only
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___9.The presence of hydrochloric acid in the stomach is responsible for the:
A. conversion of starch to sugar.
B. conversion of pepsinogen to pepsin
C. secretion of bile
D. secretion of insulin
E. secretion of glucose
___10. Starch-digesting enzymes are secreted into the:
A. esophagus only
B. small intestine only
C. small intestine and large intestine
D. mouth and esophagus
E. mouth and small intestine
___11. The PH of the human blood is closest to:
A. 3.5
B. 5.5
C.7.5
D.9.5
E. 10.5
___12. The primary function of valves in veins of the circulatory system is to:
A. prevent the flow of blood
B. slow down the flow of blood
C. prevent the backflow of blood
D. prevent clotting
E. pulsate
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___13. Transporting oxygen in the blood is the main function of the :
a. plasma
b. lymph
c. white blood cells
d. red blood cells
e. platelets
___14. E. coli bacteria in large intestine are responsible for digesting cellulose. Human can not
digest cellulose because :
A. E.coli digest cellulose more than human
B. lack of E. coli in small intestine
C. The PH in the large intestine is not shitable
D. lack of enzymes that digest cellulose
E. cellulose is not indigestion.
Answer the following questions about the respiratory System:
___1. The primary location of the O²/CO² exchange in the human respiratory system is:
A. nose
B. trachea
C. bronchiole
D. bronchioles
E. alveoli
___2. The exchange of O2 and CO2 between blood and air in the lungs occurs through the process
of:
A. diffusion
B. osmosis
C. secretion
D. active transport
E. pinocytosis
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___3. An important role of bicarbonate ions in blood is to:
A. carry oxygen
B. act like a buffer
C. Bind with hemoglobin
D. supply cells with carbon
E. Increase the rate of cellular respiration
___4. In humans, the rate of breathing primarily controlled by:
A. cerebral cortex
B. medulla oblongata
C. cerebellum
D. pituitary gland
____5. Hemoglobin is a protein in red blood cells that carries and transport oxygen and some
carbon dioxide. Its affinity to oxygen changes as blood travels from the lungs to the body tissues
and back to the lungs again.
One could expect hemoglobin to have:
A. a high carbon dioxide affinity in the lungs and a low oxygen affinity in the tissues.
B. a low carbon dioxide affinity in the lungs and a high oxygen affinity in the tissues.
C. a high oxygen affinity in the lungs and a low oxygen affinity in the tissues.
D. a low oxygen affinity in the lungs and a high oxygen affinity in the tissues.
E. a high oxygen affinity in the lungs and a high carbon dioxide affinity in the lungs.
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____6. The largest amount of carbon dioxide is carried to the lungs by:
A. Leukocytes
B. Thrombocytes
C. Erythrocytes
D. hemoglobin in red blood cells
E. the plasma as the bicarbonate ion
_____7. All the following are correct about gas exchange except:
A. hemoglobin carries oxygen and carbon dioxide in fairly equal amouts.
B. breathing rate is regulated by the medulla of the brain
C. The purpose of the nose is to filter, warm and moistin air.
D. gas exchange occurs in the alveoli
E. when carbon dioxide builds up in the blood the PH lowers
___8. Humans lungs contain protease enzyme that helps destroy bacteria that are inhaled and
a blocking agent that prevent the protease from digesting the protein of lung tissues. If the
blocking agent is destroyed by tobacco smoke<
Which of the following diseases would be a direct result?
A. pneumonia
B. emphysema
C. tuberculosis
D. influenza
E. Black lung
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