BIO 161 PSU EXAM 4 QUESTIONS AND VERIFIED ANSWERS GRADE A.

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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