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WorksheetsDigestive System/ Enzymes/ Respiratory System
Total questions: 140
Worksheet time: 1hrs 10mins
Name
Class
Date
1.
What chemical helps break down food?
a)
nutrients
b)
saliva
c)
enzyme
2.
What does your body make when it uses all the nutrients in food?
a)
saliva
b)
waste
c)
enzyme
3.
Which organ mashes food into tiny pieces?
a)
anus
b)
stomach
c)
esophagus
4.
Which organ pushes solid waste out of your body?
a)
stomach
b)
small intestine
c)
anus
5.
Which intestine helps undigested food become solid waste?
a)
small intestine
b)
large intestine
6.
Which organ is a tube that helps you swallow food?
a)
anus
b)
small intestine
c)
esophagus
7.
Which intestines break down food into nutrients?
a)
small intestines
b)
large intestines
8.
Which glands produce enzymes in your mouth to help digest food?
a)
salivary glands
b)
stomach
c)
small intestines
9.
Which organ helps air go down into the lungs?
a)
esophagus
b)
windpipe
c)
nose
10.
Which organ is not part of the respiratory system?
a)
mouth
b)
lungs
c)
nose
d)
windpipe
e)
stomach
11.
Where in the respiratory system does gas exchange occur?
a)
in the heart
b)
in the alveoli
c)
in the pharynx
d)
in the trachea
12.
The difference between chemical digestion and mechanical digestion is that chemical digestion _____.
a)
breaks down food into smaller pieces and mechanical does not
b)
uses teeth while mechanical uses the villi
c)
builds food into more complex proteins while mechanical digestion breaks the food into smaller pieces
d)
breaks down food into nutrients and wasted using stomach acid while mechanical digestion uses teeth to break the food into smaller parts
13.
What is the name of the small flap of tissue that seals off the trachea during swallowing?
a)
pharynx
b)
larynx
c)
epiglottis
d)
alveoli
14.
Which parts of the respiratory system divide into smaller and smaller tubes in a pattern that resembles the branches of a tree?
a)
alveoli
b)
trachea
c)
bronchioles
d)
epiglottis
15.
Hair like structures that line the nasal cavities and trachea, and filter the air brought into the body, are called _____.
a)
cilia
b)
mucus
c)
bronchi
d)
capillaries
16.
The function of the respiratory system is to bring what substance into the body?
a)
water
b)
oxygen
c)
carbon dioxide
d)
red blood cells
17.
Where in the respiratory system does gas exchange occur?
a)
in the heart
b)
in the alveoli
c)
in the pharynx
d)
in the trachea
18.
What is this tube called?
a)
Trachea
b)
Bronchi
c)
Alveoli
d)
Esophogus
19.
The arrow is pointing to what tubes?
a)
Bronchi
b)
Trachea
c)
Alveoli
d)
Esophogus
20.
What organ is the arrow pointing to?
a)
Trachea
b)
Liver
c)
Lungs
d)
Heart
21.
What do the thin walled narrow capillaries allow for?
a)
Oxygen exchange at the cellular level
b)
Carbon Dioxide exchange at the cellular level
c)
Nutrient Exchange at the cellular level
d)
All of these things
22.
What is the name of the tube in red?
a)
Bronchi
b)
Trachea
c)
Esophogus
d)
Arteries
23.
What system is pictured here?
a)
Digestive System
b)
Cardiovascular System
c)
Eating System
d)
Intestinal System
24.
What is the function of the Mesentery?
a)
Nutrient Transport from the Intestines to the rest of the body
b)
Oxygen Transport to the Intestines
c)
Holding the Intestine in an organized pattern
d)
All of the above
25.
What organ is the arrow pointing to?
a)
Small Intestine
b)
Pancreas
c)
Stomach
d)
Liver
26.
What does the Pancreas do for the body?
a)
Produces Digestive Enzymes
b)
Produces Oxygen for the Body
c)
Removes Carbon Dioxide from the Body
d)
All of the above
27.
The arrow is pointing to what organ?
a)
Spleen
b)
Stomach
c)
Pancreas
d)
Liver
28.
What does the liver do for a human body?
a)
Stores glucose in the form of starch called glycogen
b)
Released glucose from stores of starch called glycogen
c)
Breaks down many toxic chemicals and drugs that enter the body
d)
All of the above
29.
What is an example of chemical breakdown?
a)
Chewing
b)
Saliva
c)
Peristalsis
30.
What is the function of the villi?
a)
Digests fat
b)
Digests protein
c)
Absorbs nutrients
d)
Absorbs water
31.
What starts the process of chemical breakdown?
a)
Saliva
b)
Oxygen
c)
Hydrogen
32.
This is where food is reduced to a liquid form.
a)
large intestine
b)
small intestine
c)
stomach
d)
rectum
33.
Type of digestion in the stomach:
a)
Mechanical
b)
Chemical
c)
Both
34.
What is the purpose of an enzyme?
a)
give permission for the reaction
b)
raise activation energy
c)
speed up reactions
d)
control how many reactions occur
35.
Enzymes are an example of
a)
Lipids
b)
Carbohydrate
c)
Protein
d)
Nucleic Acid
36.
Enzymes are capable of increasing the rate of a chemical reaction within a living cell. Enzymes accomplish this through which of the following means?
a)
reducing the number of products
b)
reducing the activation energy
c)
increasing the temperature of the cell
d)
increasing the concentration of reactants
37.
Each enzyme only has 1 substrate that will fit its active site. What is this called?
a)
reusable
b)
catalyst
c)
specific
d)
fragile
38.
Any substance that is acted upon by an enzyme is called a(n)?
a)
Coenzyme
b)
Substrate
c)
Vitamin
d)
Polypeptide
39.
What 3 letters do enzymes typically end in?
a)
-ose
b)
-ase
c)
-ese
d)
-tic
40.
After the enzyme and substrate bind together and perform the reaction, what does the substrate become?
a)
a substrate
b)
an enzyme
c)
a product
d)
an active site
41.
Letter B...
a)
active site
b)
enzyme
c)
substrate
d)
products
42.
In the diagram, what is letter A?
a)
product
b)
substrate
c)
enzyme-substrate complex
d)
active site
43.
Letter D...
a)
active site
b)
enzyme
c)
substrate
d)
products
44.
Letter C...
a)
active site
b)
enzymes
c)
substrate
d)
products
45.
In a chemical reaction, ________ are what you have at the end
a)
Products
b)
Molecules
c)
Reactants
d)
Substances
46.
An enzyme speeds up a chemical reaction in the cell but can only be used once. True or False?
a)
true
b)
false
47.
What is a substance called if it speeds up a chemical reaction?
a)
reusable
b)
catalyst
c)
specific
d)
fragile
48.
Each enzyme only has 1 substrate that will fit its active site. What is this called?
a)
reusablility
b)
denaturation
c)
specificity
d)
fragility
49.
With what 3 letters do enzymes typically end?
a)
-ose
b)
-ase
c)
-ese
d)
-tic
50.
The graph shows how enzymes affect reactions in cells. Which statement best summarizes the information shown in the graph?
a)
Enzymes increase the energy of the reactants.
b)
Enzymes decrease the energy level of the products.
c)
Enzyme decrease the activation energy of the reaction.
d)
Enzymes reverse the direction of the reaction.
51.
Which of the following conclusions can be drawn from this graph?
a)
The optimum pH of the enzyme is 6.6.
b)
The optimum pH of the enzyme is 5.8
c)
The enzyme’s activity increases as pH increases 5.0 to 9.0
d)
The enzyme’s activity is greater around pH of 8.0 .
52.
In the diagram, what is letter A?
a)
product
b)
substrate
c)
enzyme-substrate complex
d)
active site
53.
Enzymes are...
a)
nucleic acids
b)
proteins
c)
lipids
d)
carbohydrates
54.
An enzyme speeds up a chemical reaction in the cell but can only be used once. True or False?
a)
true
b)
false
55.
What happens when enzymes are heated to a high temperature?
a)
The enzymes die.
b)
The shapes of the enzyme are altered denature
c)
The enzymes' amino acid sequence changes.
d)
The enzymes remain the same
56.
Enzymes speed up reaction rates by changing...
a)
Activation Energy
b)
pH
c)
Hydrogen Bonds
d)
Kinetic Energy
57.
Which enzyme is most efficient in a basic solution?
a)
A
b)
B
58.
Letter E...
a)
active site
b)
enzyme
c)
substrate
d)
products
59.
The area that the substrate fits into on the enzyme is called the:
a)
Active Site
b)
Allosteric Site
c)
DiSulphide Bridge
d)
β-Pleated Sheet
60.
Enzymes catalyze reactions by ___________ Activation Energy.
a)
Increasing
b)
Decreasing
61.
This reaction shows a(n) ____________ reaction
a)
Catabolic
b)
Anabolic
c)
Dehydration Synthesis
d)
Halogenation
62.
Enzymes speed up reaction rates by changing:
a)
Activation Energy
b)
pH
c)
Hydrogen Bonds
d)
Kinetic Energy
63.
The current model of enzyme action is referred to as the:
a)
Induced Fit Model
b)
Lock & Key Model
c)
Singer-Nicolson Model
d)
Davson-Danielli Model
64.
Most enzymes have the ending:
a)
-ase
b)
-ose
c)
-ic acid
d)
-ate
65.
At low temperatures enzyme activity declines because of:
a)
Denaturation
b)
Decreased Kinetic Motion
c)
Increased H-Bonding
d)
Dissociation of Ionic Compounds
66.
The molecule an enzyme is working on is called the:
a)
Substrate
b)
Solvent
c)
Allosteric Inhibitor
d)
CoEnzyme
67.
When a molecule can occupy the same active site as the substrate, a situation called __________________ can result
a)
Competitive lnhibition
b)
Allosteric Regulation
c)
Non-Competitive Inhibition
d)
Feedback Inhibition
68.
A molecule binds to an enzyme and opens the active site so it can bind to the substrate. This is called:
a)
Allosteric Activation
b)
Allosteric Inhibition
c)
Competitive Activation
d)
Competitive Inhibition
69.
Enzymes are considered to be
a)
Lipids
b)
Carbohydrate
c)
Protein
d)
Nucleic Acid
70.
What is the purpose of an enzyme?
a)
give permission for the reaction
b)
raise activation energy
c)
speed up reactions
d)
control how many reactions occur
71.
Where do substrates bind on an enzyme?
a)
voltage-gated channels
b)
surface receptor
c)
calcium channels
d)
active site
72.
What is structure A?
a)
Substrate
b)
Active site
c)
Enzyme
d)
Products
73.
What 3 letters do enzymes typically end in?
a)
-ose
b)
-ase
c)
-ese
d)
-tic
74.
What is the name for the mechanism of enzyme activity?
a)
Lock and key
b)
jigsaw puzzle
c)
hammer and nail
d)
two hands pattern
75.
At 40 degrees Celsius, your biological enzymes will...
a)
Functional optimally
b)
Denature
c)
Wait until the temp. increases
d)
Wait until the temp. decreases
76.
Which of the following conclusions can be drawn from this graph?
a)
The optimum pH of the enzyme is 6.6.
b)
The optimum pH of the enzyme is 5.8
c)
The enzyme’s activity increases as pH increases 5.0 to 9.0
d)
The enzyme’s activity is greater around pH of 8.0 .
77.
What makes an enzyme substrate specific?
a)
Size
b)
Shape
c)
Name
d)
Location it is found in
78.
Enzymes are considered to be
a)
Lipids
b)
Carbohydrate
c)
Protein
d)
Nucleic Acid
79.
What is the purpose of an enzyme?
a)
give permission for the reaction
b)
raise activation energy
c)
speed up reactions
d)
control how many reactions occur
80.
Where do substrates bind on an enzyme?
a)
voltage-gated channels
b)
surface receptor
c)
calcium channels
d)
active site
81.
What is a substance called if it speeds up a chemical reaction?
a)
reusable
b)
catalyst
c)
specific
d)
fragile
82.
How do enzymes increase the speed of chemical reactions?
a)
reducing the number of products
b)
reducing the activation energy
c)
increasing the temperature of the cell
d)
increasing the concentration of reactants
85.
What is the name for the mechanism of enzyme activity?
a)
Lock and key
b)
jigsaw puzzle
c)
hammer and nail
d)
two hands pattern
86.
After the enzyme and substrate bind together and perform the reaction, what does the substrate become?
a)
a substrate
b)
an enzyme
c)
a product
d)
an active site
85.
What is the name for the mechanism of enzyme activity?
a)
Lock and key
b)
jigsaw puzzle
c)
hammer and nail
d)
two hands pattern
86.
After the enzyme and substrate bind together and perform the reaction, what does the substrate become?
a)
a substrate
b)
an enzyme
c)
a product
d)
an active site
87.
can a change in pH alter the active site of an enzyme
a)
yes
b)
no
88.
Which of these is NOT true?
a)
Enzymes can denature (change shape) when the temperature gets too high.
b)
Enzymes can only be used once in a chemical reaction.
c)
Extreme pH can denature enzymes.
d)
Enzymes speed up chemical reactions.
89.
What is function of the dome-shaped diaphragm?
a)
This is where gas exchange happens.
b)
Air passes through the diaphragm on the way to the lungs.
c)
It attaches to the lungs to help in breathing.
d)
It is under the lungs and keeps them from falling down to your stomach.
90.
What are the main organs of gas exchange in the respiratory system?
a)
diapragm
b)
lungs
c)
trachea
d)
bronchi
91.
When you breathe, your lungs take in ___ and remove ___.
a)
air/oxygen
b)
oxygen/carbon dioxide
c)
carbon dioxide/waste
d)
waste/air
92.
What is the function of the bronchi?
a)
Transport air from nose to lungs
b)
Transport air from trachea to lungs
c)
Transport air from lungs to alveoli
d)
Transport air from alveoli to blood
93.
The two main branches from the trachea (one to each lung)
a)
bronchi
b)
alveoli
c)
capillaries
d)
bronchioles
94.
A disorder of the lungs called ____ causes the bronchi to become restricted (get smaller) so air can't get to the lungs.
a)
asthma
b)
cold
c)
influenza
d)
bronchitis
95.
The air sacs that are covered with capillaries where gas exchange takes place
a)
bronchi
b)
lungs
c)
oxygen
d)
alveoli
96.
Name the organ label # 6.
a)
alveoli
b)
bronchi
c)
trachea
d)
lungs
97.
What is tube that is also known as your wind pipe?
a)
esophogus
b)
bronchi
c)
trachea
d)
alveoli
98.
Flap of skin that covers the opening to the windpipe during swallowing
a)
Stomach
b)
Trachea
c)
Pancreas
d)
Epiglottis
99.
The passageway that is shared by both the digestive and respiratory system is the....
a)
larynx
b)
pharynx
c)
trachea
d)
nose
100.
Name the structure labeled 8
a)
lungs
b)
trachea
c)
diaphragm
d)
alveoli
101.
The beginning point of the respiratory system where air is taken into the body.
a)
lung
b)
diaphragm
c)
nose
d)
trachea
102.
A wide muscle that separates the chest cavity from the abdominal cavity and aids in the inflation of the lungs.
a)
diaphragm
b)
heart
c)
nose
d)
trachea
103.
Tiny air sacs in the lungs that are the site of gas exchange between the lungs and blood.
a)
alveoli
b)
relax
c)
diaphragm
d)
nose
104.
A lengthening of the muscle when made less tense, to release.
a)
relax
b)
lung
c)
respiratory system
d)
respiration
105.
Having to do with the voice or speaking.
a)
heart
b)
lungs
c)
vocal
d)
singing
106.
The tube in the body through which air moves as it travels to and from the lungs;the windpipe.
a)
heart
b)
bone
c)
blood vessel
d)
trachea
107.
The process of taking in oxygen and releasing carbon dioxide from the body.
a)
transpiration
b)
respiration
c)
digestion
d)
relaxation
108.
Organs of the respiratory system that bring oxygen-rich air into the body and send oxygen-poor air out of the body.
a)
heart
b)
muscles
c)
lungs
d)
bones
109.
What is the respiratory system ?
a)
The respiratory system is the system that helps circulate our blood .
b)
The respiratory system is the system that takes in oxygen and takes the unneeded particles and creates carbon dioxide.
c)
The respiratory system is a system that is similar to the circulatory system.
d)
The respiratory system is a system that holds the heart as an internal organ.
110.
What does the Larynx hold ?
a)
The larynx holds the whole respitory system.
b)
The larynx holds the trachea.
c)
The larynx holds the vocal chords.
d)
The larynx hold the wind pipe.
111.
a flap of tissue that closes when we eat so food doesn't not go down the trachea
a)
larynx
b)
pharynx
c)
trachea
d)
epiglottis
112.
A chamber behind the nose and mouth that leads to the trachea
a)
pharynx
b)
trachea
c)
epiglottis
d)
larynx
113.
Letter B is pointing to which organ of the Respiratory System?
a)
Nose
b)
Trachea
c)
Lungs
d)
Diaphragm
114.
How is carbon dioxide released from the body?
a)
When we exhale
b)
When we urinate
c)
When we sweat
d)
When we inhale
115.
During exhalation the diaphragm moves up and the volume of air decreases in the lungs.
a)
True
b)
False
116.
After air moves through the pharynx it continues downward. The _____, or windpipe, directs the air into 2 separate branches or tubes.
a)
mucus
b)
trachea
c)
larynx
d)
epiglottis
117.
cleans, moistens, and warms the air
a)
trachea
b)
larynx
c)
nasal passage
d)
windpipe
118.
Given the following structures:
1. larynx
2. nasal cavity
3. pharynx
4. trachea
Which of the following is the correct order that air would flow during inhalation.
1. larynx
2. nasal cavity
3. pharynx
4. trachea
Which of the following is the correct order that air would flow during inhalation.
a)
1,2,3,4
b)
2,3,1,4
c)
2,1,3,4
d)
4,2,3,1
119.
The diaphragm is found:
a)
At the back of the throat.
b)
Below the larynx.
c)
Under the epiglottis.
d)
Under the rib cage.
120.
What are the smaller airways connected to the bronchi called?
a)
Larynx
b)
Trachea
c)
Bronchioles
d)
Pharynx
121.
Which is NOT a function of the Respiratory System?
a)
it warms the air
b)
it exchanges O2 and CO2
c)
It pumps blood to the organs
d)
it creates sound through the larynx
122.
When you exercise, your heart beats faster to...
a)
spread oxygen throughout your body more quickly.
b)
make you feel excited.
c)
let you know you're working hard.
d)
inflate your lungs
123.
Bony ridges on the lateral walls of the nasal cavity that increase surface area are known as...
a)
paranasal sinuses
b)
nasal septa
c)
conchae
d)
nostrils
124.
Given the following structures:
1. larynx
2. nasal cavity
3. pharynx
4. trachea
Which of the following is the correct order that air would flow during inhalation.
1. larynx
2. nasal cavity
3. pharynx
4. trachea
Which of the following is the correct order that air would flow during inhalation.
a)
1,2,3,4
b)
2,3,1,4
c)
2,1,3,4
d)
4,2,3,1
125.
The trachea...
a)
extends from the nasal cavity to the bronchi
b)
is lined with cilia
c)
lies posterior to the esophagus
d)
is the passageway for food into the stomach
126.
The trachea...
a)
extends from the nasal cavity to the bronchi
b)
is lined with cilia
c)
lies posterior to the esophagus
d)
is the passageway for food into the stomach
127.
Given the following structures:
1. alveoli
2. bronchi
3. bronchioles
Which of the following is the correct order in which air would flow after inhalation?
1. alveoli
2. bronchi
3. bronchioles
Which of the following is the correct order in which air would flow after inhalation?
a)
1,2,3
b)
2,1,3
c)
2,3,1
d)
3,2,1
128.
The enzymes become denatured if the temperature is _______ compared to its optimum temperature.
a)
too high or too low
b)
too low
c)
too high
129.
What do we know about the enzyme's structure if the enzyme is in its optimum pH
a)
the enzyme structure is not denatured, meaning that the active site is still in tact
b)
the enzyme structure is not denatured, meaning that the active site is changed
c)
the enzyme structure is denatured
130.
Substrates can be broken down into many products during catabolic reactions or many substrates can be built up into a bigger product during anabolic reactions.
a)
true
b)
false
131.
What temperature do you think our enzymes will work the best at?
a)
room temperature, 25 degrees
b)
0 degree
c)
50 degrees
d)
37 degrees
132.
Which of the factors does NOT affect enzymatic activity?
a)
Temperature
b)
pH
c)
Concentration
d)
Color
133.
What happens when an enzyme changes shape?
a)
The reaction speeds up
b)
The reaction slows down
c)
The enzyme dies
d)
The enzyme has to change back its shape to work
135.
Enzymes need certain environmental conditions in order to function properly. What happens when enzymes are heated to a high temperature?
a)
they die
b)
they denature
c)
they change their amino acid sequence
d)
they work better
135.
Enzymes need certain environmental conditions in order to function properly. What happens when enzymes are heated to a high temperature?
a)
they die
b)
they denature
c)
they change their amino acid sequence
d)
they work better
136.
Enzyme A digests proteins in the stomach (environment with a pH of 2). Enzyme B digests proteins in the small intestine (environment with a pH of 8). Which of the following is NOT true:
a)
Enzyme A would be denatured in the small intestine.
b)
Enzyme A works best in acidic conditions.
c)
Enzyme A can also work in the small intestine.
d)
Enzyme A helps in the hydrolysis of proteins.
137.
What would happen to the rate of reaction if more enzyme added to the solution at point C
a)
increase reaction rate
b)
decrease reaction rate
c)
no change in reaction rate
138.
What would happen to the rate of reaction if more substrate added to the solution at point C
a)
increase reaction rate
b)
decrease reaction rate
c)
no change in reaction rate
139.
Based on the graph, what would happen to the rate of enzyme activity if the temperature increased from 50C to 60C?
a)
increase activity
b)
decrease activity
c)
no change
140.
What happens between the digestive system and the circulatory system?
a)
exchanging food
b)
exchanging gas
c)
exchanging food and gas
d)
exchanging nutrients and wastes
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