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Muscle Physiology Verified A+

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Muscle Physiology Verified A+ smooth muscle ️️involuntary, non-striated, no sarcomeres, short, spindle-shaped, single-central nucleus, good regeneration, found on walls of blood vessels, digestive, respiratory, urinary, reproductive organs cardiac muscle ️️involuntary, ...

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  • November 18, 2024
  • 14
  • 2024/2025
  • Exam (elaborations)
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  • Muscle Physiology Verified A+
  • Muscle Physiology Verified A+
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Muscle Physiology Verified A+

smooth muscle ✔️✔️involuntary,

non-striated, no sarcomeres,

short, spindle-shaped,

single-central nucleus,

good regeneration,

found on walls of blood vessels, digestive, respiratory, urinary, reproductive organs



cardiac muscle ✔️✔️involuntary,

striated, sarcomeres

short, branched, intercalated discs,

single nucleus,

no regeneration,

found on the heart



skeletal muscle ✔️✔️voluntary,

striated, sarcomeres

long, cylindrical,

multi-nucleate along top/bottom,

not good regeneration,

found on bones for movement



characteristics of muscle tissue ✔️✔️a. excitability

b. contractility

c. elasticity

, excitability ✔️✔️can carry an electrical signal, the electrical signal is called an action potential which is
actually a change of charge across the membrane of a cell



which other cell can carry action potentials? ✔️✔️neurons



contractility ✔️✔️through special protein filaments in muscle that contain actin and myosin



elasticity ✔️✔️muscles recoil back to shape and stretch (smooth muscles are better at stretching than
skeletal muscle)



functions of muscle tissue ✔️✔️a. motion

b. posture

c. body heat



where is skeletal muscle located relative to the skin? ✔️✔️underneath the skin, directly or indirectly
attached to the bones of the skeleton



to reach skeletal muscle you would have to cut through the following layers ✔️✔️1. skin

2. hypodermis

3. deep fascia



skin ✔️✔️epidermis & dermis (keratinized stratified squamous epithelial tissue)



hypodermis ✔️✔️superficial fascia=subcutaneous tissue

(adipose tissue, areolar tissue)



why is the hypodermic layer important? ✔️✔️insulation (body temp), fat storage, protects the organs
and bones

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