Question

part a - matching
match the definition/description on the right with the term on the left. /12
____ excitability a. ability to shorten under load
____ eccentric contraction b. ability to return to original shape
____ elasticity c. end of muscle attached to the movable bone of a joint
____ red muscle fibers d. slow twitch muscle fibers
____ extensibility e. ability to respond to stimuli
____ isometric contraction f. muscle shortens and thickens
____ contractibility g. no change in muscle length even though there is resistance
____ origin h. ability to stretch
____ white muscle fibers i. end of muscle attached to the stationary bone of a joint
____ concentric contraction j. fast - twitch muscle fibers
____ isokinetic contraction k. muscle lengthens under load
____ insertion l. maximal muscle tension at all joint angles

part b - fill in the blanks/short answer /27
complete the following statements by filling in the blanks.

1. the definition of myology is ______________________.
2. in your own words, provide a definition for the following terms:

a. agonist muscle:
______________________________________________
______________________________________________
b. antagonist muscle:
______________________________________________
______________________________________________
there are approximately ______ muscles in the human body.

Explanation:

Part A - Matching

To solve the matching, we analyze each term and its corresponding definition:

• Excitability: Ability to respond to stimuli (matches e).
• Eccentric contraction: Muscle lengthens under load (matches k).
• Elasticity: Ability to return to original shape (matches b).
• Red muscle fibers: Slow - twitch muscle fibers (matches d).
• Extensibility: Ability to stretch (matches h).
• Isometric contraction: No change in muscle length even though there is resistance (matches g).
• Contractibility: Ability to shorten under load (matches a).
• Origin: End of muscle attached to the stationary bone of a joint (matches i).
• White muscle fibers: Fast - twitch muscle fibers (matches j).
• Concentric contraction: Muscle shortens and thickens (matches f).
• Isokinetic contraction: Maximal muscle tension at all joint angles (matches l).
• Insertion: End of muscle attached to the movable bone of a joint (matches c).

Part B - Fill in the Blanks/Short Answer

1. Definition of myology: Myology is the scientific study of muscles, including their structure, function, physiology, and pathology.
2. Definitions:

• a. AGONIST muscle: An agonist muscle is a muscle that contracts to produce a specific movement at a joint. It is the primary muscle responsible for initiating and carrying out a particular action (e.g., the biceps brachii is the agonist when flexing the elbow).
• b. ANTAGONIST muscle: An antagonist muscle is a muscle that opposes the action of the agonist muscle. When the agonist contracts to perform a movement, the antagonist relaxes to allow the movement, and it can also contract to reverse the movement (e.g., the triceps brachii is the antagonist to the biceps brachii during elbow flexion).

1. Number of muscles in the human body: There are approximately 600 muscles in the human body.

Part A Answers (Matching)

• Excitability: e
• Eccentric contraction: k
• Elasticity: b
• Red muscle fibers: d
• Extensibility: h
• Isometric contraction: g
• Contractibility: a
• Origin: i
• White muscle fibers: j
• Concentric contraction: f
• Isokinetic contraction: l
• Insertion: c

Part B Answers (Fill in the Blanks/Short Answer)

1. The definition of myology is the scientific study of muscles (including their structure, function, etc.).
2. a. AGONIST muscle: A muscle that contracts to produce a movement (primary mover for an action).

b. ANTAGONIST muscle: A muscle that opposes the action of the agonist muscle.

1. There are approximately 600 muscles in the human body.

Answer:

Part A - Matching

To solve the matching, we analyze each term and its corresponding definition:

• Excitability: Ability to respond to stimuli (matches e).
• Eccentric contraction: Muscle lengthens under load (matches k).
• Elasticity: Ability to return to original shape (matches b).
• Red muscle fibers: Slow - twitch muscle fibers (matches d).
• Extensibility: Ability to stretch (matches h).
• Isometric contraction: No change in muscle length even though there is resistance (matches g).
• Contractibility: Ability to shorten under load (matches a).
• Origin: End of muscle attached to the stationary bone of a joint (matches i).
• White muscle fibers: Fast - twitch muscle fibers (matches j).
• Concentric contraction: Muscle shortens and thickens (matches f).
• Isokinetic contraction: Maximal muscle tension at all joint angles (matches l).
• Insertion: End of muscle attached to the movable bone of a joint (matches c).

Part B - Fill in the Blanks/Short Answer

1. Definition of myology: Myology is the scientific study of muscles, including their structure, function, physiology, and pathology.
2. Definitions:

• a. AGONIST muscle: An agonist muscle is a muscle that contracts to produce a specific movement at a joint. It is the primary muscle responsible for initiating and carrying out a particular action (e.g., the biceps brachii is the agonist when flexing the elbow).
• b. ANTAGONIST muscle: An antagonist muscle is a muscle that opposes the action of the agonist muscle. When the agonist contracts to perform a movement, the antagonist relaxes to allow the movement, and it can also contract to reverse the movement (e.g., the triceps brachii is the antagonist to the biceps brachii during elbow flexion).

1. Number of muscles in the human body: There are approximately 600 muscles in the human body.

Part A Answers (Matching)

• Excitability: e
• Eccentric contraction: k
• Elasticity: b
• Red muscle fibers: d
• Extensibility: h
• Isometric contraction: g
• Contractibility: a
• Origin: i
• White muscle fibers: j
• Concentric contraction: f
• Isokinetic contraction: l
• Insertion: c

Part B Answers (Fill in the Blanks/Short Answer)

1. The definition of myology is the scientific study of muscles (including their structure, function, etc.).
2. a. AGONIST muscle: A muscle that contracts to produce a movement (primary mover for an action).

b. ANTAGONIST muscle: A muscle that opposes the action of the agonist muscle.

1. There are approximately 600 muscles in the human body.