BIO 161 PSU EXAM 4 QUESTIONS AND VERIFIED
ANSWERS GRADE A.
What are the three types of muscle tissue?
skeletal, cardiac, smooth
What are some characteristics of skeletal muscle?
-Voluntary
- Striated
- Multinucleate
- Attached to bone or fascia (connective tissue)
What are some characteristics of cardiac muscle?
- Involuntary
- Striated
- Mononucleate
- Autorhythmic (cells can self-regulate contraction)
What are some characteristics of smooth muscle?
- Involuntary
- Non-striated
- Mononucleate
What are the 5 properties of muscle tissue?
excitability, conductivity, contractility, extensibility, elasticity
What is excitability?
respond to chemicals released from motor neurons
What is conductivity?
ability to propagate electrical signals over membrane
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, What is contractility?
ability to shorten and generate force
What is extensibility?
ability to be stretched without damaging the tissue
What is elasticity?
ability to return to original shape after being stretched
What is formed by a group of fascicles?
Muscle
What is formed by a group of muscle fibers?
Fascicle
What is formed by a group of myofibrils?
Muscle fibers
What do myofibrils contain?
bundles of protein filaments, organized into sarcomeres
What are three functions of connective tissue?
-Protects muscle cells
-Reduces friction
-Creates space for extracellular fluid
What are the three layers of connective tissue?
Epimysium, Perimysium, Endomysium
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ANSWERS GRADE A.
What are the three types of muscle tissue?
skeletal, cardiac, smooth
What are some characteristics of skeletal muscle?
-Voluntary
- Striated
- Multinucleate
- Attached to bone or fascia (connective tissue)
What are some characteristics of cardiac muscle?
- Involuntary
- Striated
- Mononucleate
- Autorhythmic (cells can self-regulate contraction)
What are some characteristics of smooth muscle?
- Involuntary
- Non-striated
- Mononucleate
What are the 5 properties of muscle tissue?
excitability, conductivity, contractility, extensibility, elasticity
What is excitability?
respond to chemicals released from motor neurons
What is conductivity?
ability to propagate electrical signals over membrane
1|Page
, What is contractility?
ability to shorten and generate force
What is extensibility?
ability to be stretched without damaging the tissue
What is elasticity?
ability to return to original shape after being stretched
What is formed by a group of fascicles?
Muscle
What is formed by a group of muscle fibers?
Fascicle
What is formed by a group of myofibrils?
Muscle fibers
What do myofibrils contain?
bundles of protein filaments, organized into sarcomeres
What are three functions of connective tissue?
-Protects muscle cells
-Reduces friction
-Creates space for extracellular fluid
What are the three layers of connective tissue?
Epimysium, Perimysium, Endomysium
2|Page
