HPNU 3060: Chapter 12 Review Questions and Answers (100% Correct Answers) Already Graded A+

1 Exampromax - Stuvia US 2025/2026


HPNU 3060: Chapter 12 Review Questions
and Answers (100% Correct Answers) Already
Graded A+


Question: What are the 3 Types of Muscles? ⼀Answer: Skeletal Muscle
Smooth Muscle
Cardiac Muscle
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What are Muscle Fibers? ⼀Answer: Muscle Cells
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Question:



Question: What are Bundled Muscle Fibers Called? ⼀Answer: Muscle
Fascicle


Question: What Connective Tissue Surrounds the Entire Muscle? ⼀
Answer: Fascia


Question: What is the Cell Membrane of Muscle Fiber called? ⼀
Answer: Sarcolemma


Question: What is the Cytoplasm of a Muscle Fiber called? ⼀Answer:
Sarcoplasm


Question: What are Myofibrils? ⼀Answer: Highly Organized Bundles of
Contractile and Elastic Proteins that Carry Out the Work of Contraction

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Question: What is the Sarcoplasmic Reticulum? ⼀Answer: A Modified
Endoplasmic Reticulum that Wraps Around Each Myofibril


Question: What Structures can be Found in the Sarcoplasm? ⼀Answer:
Glycogen Granules
Mitochondria


Question: What are Transverse Tubules (T-Tubules)? ⼀Answer:
Branching Network that is Continuous with the Sarcoplasmic Reticulum
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Question: What does the Sarcoplasmic Reticulum Consist of? ⼀
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Answer: Consists of Longitudinal Tubes with Enlarged Ends called
Terminal Cisternae


Question: What Structures Form a Triad? ⼀Answer: One T-Tubule and
Two adjacent Terminal Cisternae


Question: What does the Sarcoplasmic Reticulum do? ⼀Answer: Stores
and Releases Calcium


Question: What is a Sarcomere? ⼀Answer: Contractile Unit of a
Myofibril


Question: What are Actin Filaments? ⼀Answer: Proteins that make up
the Thin Filaments of a Muscle Fiber


Question: What are Myosin Filaments? ⼀Answer: Motor Proteins that
make up the Thick Filaments of a Muscle Fiber

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Question: What are the Two Protein Chains of a Myosin Molecule? ⼀
Answer: Heavy Chains
Light Chains


Question: True or False:

Myosin Light Chains have a Regulatory Function ⼀Answer: True



Question: What is the Purpose of Myosin Heavy Chains? ⼀Answer:
Serves as a Motor Domain that uses ATP to Create Movement
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Question: What is the Motor Domain of a Myosin also known as? ⼀
Answer: Myosin ATPase


Question: What are the Two Regulatory Proteins of Myofibrils? ⼀
Answer: Tropomyosin
Troponin


Question: What are the Two Giant Accessory Proteins of Myofibrils? ⼀
Answer: Titin
Nebulin


Question: List all the Elements/Features that Each Sarcomere has ⼀
Answer: Z Disks
I Bands
A Band
H Zone
M Line