Download Science Grade 7 Unit 08: Structure and Function oI Living Systems

Science Grade 7 Unit 08: Structure and Function oILiving Systems 2013­2014
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12/05/13
1 Two body systems work together to help
remove waste products from blood. What
5 How do gills of fish help their survival?
A Gills allow fish to break down water into
are these two systems?
A circulatory and excretory
B
skeletal and digestive
C
circulatory and integumentary
oxygen and hydrogen.
B
Gills allow fish to process energy
quicker so they can move faster.
C
Gills allow fish to breathe in air and
water.
D muscular and excretory
D Gills allow fish to use the oxygen
dissolved in the water.
2 One of the functions of the endocrine
system in the body is to —
F
circulate blood to all parts of the body.
G
collect waste products and remove
them from the body.
H
birds fly?
F
They have more fat than most animals,
so they can fly for long distances.
provide a strong framework for the
G
body.
J
6 Which of the following adaptations helps
They have hollow bones, so they are
lighter.
produce enzymes to help digest food.
H
They have smaller blood vessels, so
their hearts have to work less in flight.
3 The main function of the excretory system
is to ― J
They have a larger stomach, so they
can absorb food faster.
A produce enzymes to help digest food.
B
collect and remove waste products
from the body.
C
prevent disease and fight infections.
D carry oxygen and nutrients to the
body’s cells.
4 The nervous system of the human organism
is MOST like which cell organelle?
F
mitochondrion
G
nucleus
H
chloroplast
J
cell membrane
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Use the following graphic for the next three questions.
The diagram below illustrates a vital process that occurs in the human body.
7 What two body systems are interacting in
9 What is the original source of O2 in the
this diagram?
alveoli?
A integumentary­excretory
A heart
B
digestive­circulatory
B
inhaled air
C
nervous­endocrine
C
nasal passages
D respiratory­circulatory
8 Study the diagram carefully. What process
D exhaled air
10
What is the major role of red blood cells in
is illustrated in the diagram?
the circulatory system?
F
photosynthesis
F
G
gas exchange
H
pumping blood
G
prevent disease and fight infections
J
gas deposition
H
carry digestive juices to the stomach
J
send chemical messages to the
carry nutrients and oxygen to body
cells
nervous system
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11
Ovaries produce and secrete hormones in
14
addition to eggs. To what human body
regulates temperature and serves as a
systems do ovaries belong?
barrier against harmful microorganisms,
A integumentary and reproductive
belongs to the —
B
excretory and muscular
F
circulatory system.
C
endocrine and reproductive
G
nervous system.
H
digestive system.
J
integumentary system.
D nervous and digestive
12
The largest human body organ, which
The main function of the muscular system
is ―
15
F
support of the body.
G
break down of food.
H
movement of the body.
J
removal of waste.
13
Which two body systems represented in
the diagram above help the body to break
down molecules and absorb nutrients, and
exchange oxygen and carbon dioxide?
Which statement best describes the function of
this human body system?
B
muscular and skeletal
and wastes
C
digestive and respiratory
supplies O2 to the blood, which in
D circulatory and endocrine
A breaks down food into nutrients
B
A respiratory and reproductive
turn, delivers O2 to all parts of the
body
C
provides support and movement
for the body
D produces and secretes hormones
which regulate metabolism,
growth, and development
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16
The human body has specialized organs
which collect and process substances
from the blood. The concentrated
substances are then secreted as
hormones to regulate body processes.
These specialized organs are called —
F
ducts.
G
glands.
H
organelles.
J
nodes.
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17
System A
System B
System C
System D
Transports
Absorbs
Provides
Produces
nutrients
nutrients
protection
chemicals
to body
for tissues
to regulate
cells
and
bone
organs
growth
Transports
Breaks
Provides
Maintains
oxygen
down
structure
proper
to body
food into
and frame
blood
cells
simple
for body
sugar
substances
level
Helps with removing
Converts
Produces
Helps to
wastes
food into
new red
shape
from cells
energy
blood
mood and
cells
feelings
­ Name the body system in column A:
________________________________________________________
________________________________________________________
­ Name the body system in column B:
________________________________________________________
________________________________________________________
­ Name the body system in column C:
________________________________________________________
________________________________________________________
­ Name the body system in column D:
________________________________________________________
________________________________________________________
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18
19
The cell wall is MOST like which organ system?
F
nervous
G
excretory
H
respiratory
J
integumentary
Which science tool would be appropriate for the close observation of the inside of a bird bone?
A thermometer
B
petri dish
C
hand lens
D balance
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20
A student is investigating the effect of length of exercise time on heart rate. She performed
three trials over a period of three days. Based on her data, she concluded that exercising for
longer times results in a continued increase in heart rate. Which of the following data tables
accurately represents the outcome of her investigation?
F
G
H
J
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21
What purpose does the xylem in a plant
serve?
A transportation of food and nutrients
B
transportation of water and minerals
C
anchors the plant in the ground
D transforms energy through
photosynthesis
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