North Carolina Science Grade 7

Chapter 8: Respiration and Excretion

Respiration and Excretion

1.
Besides the kidney, what other organ also filters blood to remove wastes?
A)lungs
B)heart
C)liver
D)bladder
2.
The exchange of oxygen and carbon dioxide in the lungs takes place between the __________.
A)alveoli and capillaries
B)pharynx and lungs
C)nostrils and lungs
D)bronchi and bronchiles
3.
The __________ system is made up of several different systems that function together to remove wastes from your body
A)respiratory
B)circulatory
C)urinary
D)excretory
4.
__________ is the movement of the chest that brings air into the lungs and removes waste gases.
A)Circulation
B)Breathing
C)Excretion
D)Respiration
5.
Which of the following is a method used to save the life of a choking victim?
A)bronchitis
B)abdominal thrusts
C)respiration
D)emphysema
6.
The main organs of the urinary system are two __________.
A)alveoli
B)nephrons
C)kidneys
D)lungs
7.
Some early experiments showed that a mouse could live in a container in which a plant had first been grown. What did the plant produce that the mouse needed?
A)oxygen
B)water vapor
C)carbon dioxide
D)food
8.
High levels of a protein called __________ in urine indicate kidney disease or heart failure.
A)bile
B)glucose
C)albumin
D)salt
9.
During dialysis an artificial kidney machine is used to __________.
A)increase lung pressure
B)remove wastes from blood
C)pump blood through the heart
D)produce bile
10.
What area of the brain constantly monitors the amount of water in the blood?
A)kidney
B)hypothalamus
C)bladder
D)nephron
11.
The liquid left behind in the nephron following filtration is called __________.
A)blood
B)urine
C)salt
D)sugar
12.
What muscle contracts and relaxes when you inhale and exhale?
A)diaphragm
B)trachea
C)lung
D)larynx
13.
The urinary system is important in regulating __________ in the body.
A)fluid levels
B)undigested material
C)waste gases
D)oxygen
14.
When you swallow, the epiglottis prevents __________.
A)food or liquid from entering your airway
B)air from entering your lungs
C)carbon dioxide from entering your lungs
D)dust and bacteria from entering your airway
15.
What happens to most of the water, sugar, and salts filtered from the blood in the kidneys?
A)They are exhaled from the lungs.
B)They leave through the digestive system.
C)They are converted into urine.
D)They are reabsorbed and returned to the blood.
16.
Which one of the following problems can occur if someone's kidneys don't work properly?
A)an imbalance of salts
B)less oxygen enters the capillaries
C)few if any problems would occur
D)an increase of carbon dioxide in the blood
17.
Which one of the following is a lung disorder that occurs when the bronchial tubes contract quickly?
A)emphysema
B)asthma
C)chronic bronchitis
D)common cold
18.
The __________ is a tubelike passageway used by food, liquid, and air.
A)pharynx
B)larynx
C)nostril
D)epiglottis
19.
What is the function of cilia that line the nasal cavity?
A)sweep away mucus and trapped materials
B)trap dust from the air
C)produce sticky mucus
D)moisten the air taken in
20.
Inhaling the tar in __________ is the greatest contributing factor to lung cancer.
A)asbestos
B)cigarette smoke
C)polluted air
D)coal dust
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