CLEMSON BIOL 2220 EXAM 3
What do skeletal and smooth muscle have in common? - Answer- 1. has elongated cells
2. nucleated
What do skeletal and cardiac muscle have in common? - Answer- 1. nucleated
2. Striations
What do smooth and cardiac muscle have in common? - Answer- 1. both involunta...
CLEMSON BIOL 2220 EXAM 3
What do skeletal and smooth muscle have in common? - Answer- 1. has elongated
cells
2. nucleated
What do skeletal and cardiac muscle have in common? - Answer- 1. nucleated
2. Striations
What do smooth and cardiac muscle have in common? - Answer- 1. both involuntary
control
2. nucleated
Define excitability - Answer- The ability to change a membrane potential
Define contractility - Answer- The ability to shorten, when stimulated
Define extensibility - Answer- Ability to extend/stretch, even stretching beyond their
resting length, when relaxed.
Define elasticity - Answer- Ability of a muscle cell to recoil and resume resting length
after stretching.
What are the 4 characteristics of muscle tissues? - Answer- 1. Excitability
2. Contractility
3. Extensibility
4. Elasticity
What are the 4 basic muscle functions? - Answer- 1. Produce movement
2. Maintain posture
3. Stabilize joints
4. Generate heat
State the Muscle organization levels from smallest to largest (6) - Answer-
myofilament-->sarcomere --> myofibril-->Muscle cell-->fascicle-->muscle (organ)
A myofilament contains ____________ and _____________. It is the ___________
level of a muscle. - Answer- -Acin and myosin
-smallest
A sarcomere is a segment composed of __________________s. The unit goes from
__ disk to __ disk. - Answer- myofilaments, goes from z disk to z disk.
A myofibril is made up from ___________________s, aligned within. - Answer-
sarcomeres
A muscle (fiber) cell is wrapped in ______________________, which is then
enveloped in __________________. - Answer- sarcolemma, then endomysium.
, (sarcolemma holds the fiber together, while the endomysium wraps around it next)
A fascicle holes many ____________ ______________. - Answer- muscle fibers
A fascicle is surrounded by _________________. - Answer- perimysium
The whole muscle is covered in _____________________. - Answer- Epimysium
A muscle organ is made up of many __________________. - Answer- fascicles
Epimysium is made up of ____________ ____________ connective tissue. -
Answer- dense irregular
Perimysium is made up of _____________ ______________ connective tissue. -
Answer- dense irregular
Endomysium is made up of fine ___________________ connective tissue. - Answer-
areolar
Origin vs Insertion Attachment - Answer- Origin: less or nonmovable attachment
Insertion: moveable attachment of a muscle
what are glycosomes? - Answer- Granules of stored glycogen for fuel
What is the difference between myoglobin and hemoglobin? - Answer- The
myoglobin lets go of the oxygen much faster
What does the Sarcoplasmic reticulum do? (SR) - Answer- stores and regulates
calcium
What is the function of the T tubules? - Answer- -Increase surface area, diving deep
into the cell
-Trigger calcium release
What are two different bands found in a striation pattern? - Answer- A Band
I Band
A bands are __________, while I bands are ___________. - Answer- A-dark
I-light
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