North Carolina Science Grade 7

Chapter 6: Structure and Movement

Structure and Movement

1.
Exercised muscles are __________ than inactive muscles.
A)more voluntary
B)smaller
C)less striated
D)larger
2.
About how many muscles are in your body?
A)5,000
B)206
C)4
D)600
3.
What type of muscle is found in your intestines?
A)smooth muscle
B)skeletal muscle
C)striated muscle
D)voluntary muscle
4.
How is your shoulder joint classified?
A)hinge joint
B)gliding joint
C)ball-and-socket joint
D)immovable joint
5.
Which two elements help make bones hard?
A)sodium and chlorine
B)nitrogen and helium
C)calcium and phosphorus
D)hydrogen and oxygen
6.
What stops blood from flowing out of a cut?
A)osteoblasts
B)smooth muscles
C)a clot
D)hemoglobin
7.
About how many bones does the human body have at birth?
A)206
B)300
C)506
D)94
8.
What is the skin's most important function?
A)circulation
B)protection
C)color
D)excretion
9.
__________ makes movement easier by reducing friction that might happen if bones rubbed together.
A)Red marrow
B)Periosteum
C)Cartilage
D)Hinge joints
10.
Which of these is the strong, hard layer under the periosteum?
A)voluntary muscle
B)epidermis
C)compact bone
D)marrow
11.
In which of these parts of your body would you find skeletal muscle?
A)in your heart
B)in your leg
C)in your bladder
D)in your liver
12.
Joints in the bones of your skull are __________.
A)striated
B)spongy
C)immovable
D)gliding
13.
Which of these can be found in the dermis?
A)compact bone
B)cartilage
C)sweat glands
D)melanin
14.
__________ release waste products from the body.
A)Cartilages
B)Sweat glands
C)Spongy bones
D)Skeletal muscles
15.
Where are dead skin cells found?
A)in the red marrow
B)in the epidermis
C)in the periosteum
D)in immovable joints
16.
Bones protect your __________.
A)skin
B)internal organs
C)sense of smell
D)hair
17.
Where would you find a hinge joint in your body?
A)your wrists
B)your hips
C)your fingers
D)your shoulders
18.
Food moves through your digestive system. What type of muscle makes this action happen?
A)cardiac muscles
B)voluntary muscles
C)skeletal muscles
D)involuntary muscles
19.
What is the pigment that gives your skin color called?
A)levers
B)red marrow
C)melanin
D)periosteum
20.
Two or more bones come together at __________.
A)pores
B)flexors
C)joints
D)melanin
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