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8 Cards in this Set
- Front
- Back
What are the functions of the muscular system?
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- Generation of heat
- Storage of nutrients - Guards entrances and exits of body - Stabilises joints - Support - Movement |
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What is hypertrophy, hyperplasia, and atrophy?
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hypertrophy is when muscle tissue & cells increase in size due to overuse
hyperplasia is when muscle tissue increases in size due to an increase in the number of muscle cells. atrophy is when muscle tissue decreases in size due to underusage. |
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What are the features of smooth muscle and its histology?
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- Involuntary contol
- influenced by hormones - located in walls of hollow internal structure - uni-nucleated, spindle shaped, nonstriated |
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Features of cardiac muscle & histology?
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- Involuntary control
- influenced by ANS and hormones - found only in the heart. - uni-nucleated, branched, striated |
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Features & histology of skeletal muscle?
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- Voluntary control
- Can be influenced by hormones - most abundant muscle type in body - works by pulling on bones - multinucleated, cylindrical, striated |
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Describe the organisation of skeletal muscle
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A muscle contains many muscle fascicles
A muscle fascicle contains many muscle fibres A muscle fibre contains many myofibrils A myofibril contains many myofilaments. |
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What are the three myofilaments?
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Thin filaments (actin)
Thick filaments (myosin) Elastic filaments (titin) |
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What is a sarcomere?
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A sarcomere is the basic unit of a muscle. It is made up of groups of filaments and repeats along the length of the myofibirl.
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