Answers24 - 25 CR - Biology B 0411KBFactors Affecting Biological Diversity-Standard Bio 4.4

Muscle Structure and Function Answers

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What functions does the muscular system perform?

A
It provides stability, movement, and posture.
B
It generates and conducts electrical signals.
C
It produces melanin, which protects from the sun.
D
It produces oil, which protects from foreign invasion.
2
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Which of the following correctly differentiates the types of muscles based on the type of movement that they produce?

A
smooth is voluntary; skeletal and cardiac are involuntary
B
skeletal is voluntary; smooth and cardiac are involuntary
C
cardiac is voluntary; skeletal and smooth are involuntary
D
smooth, skeletal, and cardiac are all involuntary
3

Look at the image of a muscle fiber.Which is represented by the image?

Question illustration
A
smooth muscle
B
cardiac muscle
C
actin and myosin activated
D
sacromere and tendon
4

Which describes step three of a muscle contraction?

A
The sarcomere lengthens.
B
The space between sarcomeres increases.
C
Actin and myosin are partially overlapped.
D
Actin and myosin are completely overlapped.
5

How does the muscular system help humans maintain posture?

A
Muscles continually align themselves vertically to help maintain posture.
B
Muscles continually push bones to be straight.
C
Muscles constantly contract to help fight gravity.
D
Muscles constantly contract to help work with gravity.
6

A patient with muscular dystrophy starts to receive stem cells that generate muscle tissue. Which is the best prediction of what will happen to the patient's muscle function?

A
Muscle function should decrease because the cells would produce muscle tissue.
B
Muscle function should increase because the cells would produce muscle tissue.
C
Muscle function should decrease because the cells would not produce muscle tissue.
D
Muscle function should increase because the cells would not produce muscle tissue.
7

Which function of the muscular system is best illustrated by the heart pumping blood throughout the body?

A
hormone regulation
B
support and strength
C
involuntary movement
D
voluntary movement
8

Which two structures make up the muscular system?

A
muscles and bones
B
muscles and ligaments
C
muscles and tendons
D
muscles and joints
9

How do the muscles help in thermoregulation?

A
Muscles produce oil that burns in the presence of oxygen.
B
Muscles undergo a chemical reaction that absorbs heat.
C
Muscles break down carbon dioxide, producing heat.
D
Muscles contract rapidly, producing heat.
10

What is the function of the type of muscle that is pictured below?

Question illustration
A
support and movement of the skeleton
B
movement of food through the digestive system
C
contraction and relaxation of the heart
D
generation and conduction of electrical signals

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