AnswersBiology - SC3209 ICMuscle Structure and Function

Muscle Structure and Function Answers

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1
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Which best describes the top and bottom images of muscle contraction?

Question illustration
A
The top image is more relaxed than the bottom image.
B
The top image has greater actin-myosin interactions than the bottom image.
C
The bottom image is more relaxed than the top image.
D
The bottom image has fewer overlaps than the top image.
2
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Which two structures make up the muscular system?

A
muscles and bones
B
muscles and ligaments
C
muscles and tendons
D
muscles and joints
3

The bicep muscle has an attachment point at the shoulder and one in the upper forearm. Look at these images of the bones of the arm. Imagine that the point of the arrow is where the force of the biceps muscle is applied to the bone.Which image would result in the biceps muscle contracting and the forearm being lifted?

Question illustration
A
A
B
B
C
C
D
D
4

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
5

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.
6

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
7

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.
8

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
9

What is a protein that is the main component of the thick filaments in muscle fibers and is responsible for muscle contraction?

A
actin
B
myosin
C
ATP
D
DNA
10

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
11

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.
12

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
13

How does the structure of skeletal muscle help it perform its function?

A
Its spindle-shaped cells allow it to do smooth movements.
B
Its striations allow for big movements.
C
Its nucleated cells allow it to trigger involuntary actions.
D
Its discs allow it to coordinate movement with other cells.
14

What is a tendon?

A
A tendon is a connective tissue that links a bone to a muscle.
B
A tendon is a connective tissue that links bone to bone.
C
A tendon is a connective tissue that links muscle to muscle.
D
A tendon is a connective tissue that links tendon to tendon.

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