Focus On Life Science: California Grade 7

Chapter 9: The Musculoskeletal System and Levers

Standards Review

1
What is made in the marrow? 4.g
A)white blood cells
B)red blood cells
C)ligaments
D)muscle tissue
2
Which is NOT a function of the skeletal system? 4.g
A)support
B)blood circulation
C)protection
D)movement
3
Which describes ligaments? 4.g
A)Ligaments connect bones to muscles.
B)Ligaments connect bones to other bones.
C)Ligaments make up the tips of your ears and nose and covers the ends of some bones.
D)Ligaments produce white blood cells.
4
Which is NOT a type of joint found in the human body? 4.b
A)hinge joint
B)flexion joint
C)saddle joint
D)pivot joint
5
What is the difference between a ball-and-socket joint and an ellipsoid joint? 4.b
A)The ellipsoid joint is found in other primates, but not humans. The ball-and-socket joint is found only in humans.
B)The ball-and-socket joint has a rounded bone that fits into a cuplike depression in another bone, but the ellipsoid joint is an arrangement of tendons that function as a joint.
C)An ellipsoid joint cannot move in as many directions as a ball-and-socket joint.
D)There is no difference. They are different names for the same joint.
6
Which is considered a pivot joint? 4.g
A)your lower jaw
B)knuckles of your hand
C)knuckles of your hand
D)first 2 vertebrae in your neck
7
How do muscle cells differ from other cells? 4.g
A)Muscle cells are cell walls.
B)Muscle cells contain fewer mitochondria than other cells.
C)Muscle cells contain more mitochondria than other cells.
D)Muscle cells are made in the marrow of bones.
8
Which is an example of an involuntary muscle? 4.g
A)heart
B)bicep
C)hamstring
D)tricep
9
Which is NOT a type of muscle tissue? 4.g
A)skeletal
B)cardiac
C)smooth
D)marrow
10
Which muscle is the opposing muscle to the bicep? 4.d
A)deltoid
B)tricep
C)quadricep
D)rhomboid
11
When you lift your heels off the ground, the fulcrum is at your _______. 4.g
A)hip
B)ankle
C)toes
D)knee
12
What class of levers are the most common in the body? 4.g
A)fourth
B)first
C)second
D)third
13
Which describes the relationship between joints, bones, and muscles? 4.g
A)Muscles are the fulcrum where joints apply force to bones.
B)Bones are joined together by muscles.
C)The muscles between bones form joints.
D)Bones act as levers, joints act as pivot points, and muscles provide the force.
14
If effort force is 20 N and resistance force is 60 N, what is the mechanical advantage? 4.g
A)3
B)20/60
C)1/3
D)20
15
______ is the bending of a limb that decreases the angle between the bones of the limb. 4.e, 4.g
A)Reversal
B)Extension
C)Flexion
D)Lateral
Grade 7
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