The Muscular System Key Concept Builder LESSON 2 Key Concept

Name
Date
Class
Key Concept Builder
LESSON 2
The Muscular System
Key Concept What does the muscular system do?
Directions: On each line, write the term or phrase that correctly completes each sentence.
1. All muscle tissues are made of cells that have the ability to
2. Our muscles enable us to
.
.
3. They also help us keep our
.
4. Muscles are attached to bones by
.
5. Improper posture can cause
pain.
6. Another function of muscles is to protect our internal
.
Copyright © Glencoe/McGraw-Hill, a division of The McGraw-Hill Companies, Inc.
7. When we shiver, our muscles are converting
energy to
energy.
8. This mechanism helps raise your body’s
9. The shortest muscle in the body is in the
.
.
10. The longest muscle extends from the
to the
Structure and Movement
.
35
Name
Date
Key Concept Builder
Class
LESSON 2
The Muscular System
Key Concept How do the types of muscle differ?
There are two main types of muscles—voluntary and involuntary.
Directions: On the lines, write a V next to each function that is controlled by voluntary muscles. Write an I next
to each function that is controlled by involuntary muscles.
1. smiling
2. digestion
3. walking
4. heartbeat
5. jumping
Directions: Answer each question on the lines provided.
7. What are voluntary muscles connected to?
8. For that reason, what are these muscles usually called?
9. These muscles are made of long, thin cells that give the muscles a striped appearance.
What are these stripes called?
36
Structure and Movement
Copyright © Glencoe/McGraw-Hill, a division of The McGraw-Hill Companies, Inc.
6. talking
Name
Date
Class
Key Concept Builder
LESSON 2
The Muscular System
Key Concept How do the types of muscle differ?
Directions: Circle the term or phrase that correctly completes each sentence.
skeletal and cardiac.
smooth and skeletal.
1. The two kinds of involuntary muscles are
smooth and cardiac.
only push on bones.
2. Skeletal muscles can
only pull on bones.
push and pull on bones.
alone.
3. Skeletal muscles operate
in pairs.
Copyright © Glencoe/McGraw-Hill, a division of The McGraw-Hill Companies, Inc.
in triplets.
heart.
4. Cardiac muscles are located only in the
blood vessels.
abdomen.
knobs.
5. Cardiac muscle cells have branches ending in
points.
discs.
shorter and smoother.
6. Compared with skeletal muscle cells, smooth muscle
cells are
Structure and Movement
longer and smoother.
wider and smoother.
37
Name
Date
Class
Key Concept Builder
LESSON 2
The Muscular System
Key Concept How does the muscular system interact with other body systems?
Directions: On each line, write the term from the word bank that correctly completes each sentence. Each term is
used only once.
diet
energy
exercise
homeostasis
motion
oxygen
stability
temperature
1. The muscles help keep the body’s
steady.
2. This contributes to the body’s
.
3. Skeletal muscles can produce a wide range of
.
4. When the heart pumps harder, it sends more
5. Without
to the cells.
, skeletal muscles get smaller and weaker.
of joints.
7. Like bones, muscles benefit from a healthful
8. All muscles need
38
.
to contract.
Structure and Movement
Copyright © Glencoe/McGraw-Hill, a division of The McGraw-Hill Companies, Inc.
6. Decreased muscle strength can lessen the