Differentiate between smooth,striped and cardiac muscles.
Answers
smooth muscles
- they are not striated.
- it is in spindle shaped.
- it doesn't thave branched.
- they are nucleus central.
- they have no discs.
- they are involuntary.
- they are slow.
- they contraction not inherent.
Skeleton muscle.
- striated.
- cylindrical.
- not branched.
- nuclei peripheral.
- no discs.
- voluntary.
- they are fast.
- contraction not inherent.
cardiac muscle.
- striated.
- cylindrical.
- branched.
- nuclei central.
- intercalated discs.
- they are fast.
- they contraction inherent.
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Skeletal Muscles
• Are voluntarily activated.
• Appear striped under a microscope. Also called "striated" muscle.
• Fatigue more quickly than smooth or cardiac muscles.
• Are able to stretch and resume original shape.
• Striated appearance comes from formation of actin and myosin muscle fibres.
• Are capable of powerful contractions and, just as adequately, small contractions for delicate movement requiring precision.
• Stimulated by the nervous system's motor neurons.
• Well-supplied with nerves and blood vessels.
Smooth Muscles
• Get their name from their smooth appearance under a microscope.
• Arranged in bundles of muscle fibre sheets.
• Contract involuntarily. Regulated by autonomic part of nervous system.
• Found in walls of hollow structures, including veins, arteries, and intestines.
• Maintain flow of fluid and food along hollow structures.
• Found in hair erectors, pupils, gland ducts, esophagus, bronchi, intestines, stomach, and blood vessels.
• Contract slowly and rhythmically.
• Fatigue slowly.
Cardaic Muscles
• Found only in heart and at cardiac ends of main blood vessels.
• Contract involuntarily.
• Striated when viewed under a microscope.
• Do not fatigue.
• Contract rhythmically.
• Controlled by central nervous system, but can contract without signals due to "pacemaker" cells.
• Contain high count of mitochondria and myoglobin.
• Have good blood supply.
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