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Fish Musculature
| Question | Answer |
|---|---|
| What are the three types of muscle? | Skeletal, smooth, and cardiac |
| What is smooth muscle like? | not striated, involuntary; gut muscles, important in circulatory system |
| What is skeletal muscle like? | striated, voluntary, most of fishes body mass; locomotion |
| What is cardiac muscle like? | striated, involuntary; only found in heart |
| What are myomeres? | Post-cranial skeletal muscle arranged in repeating segments |
| What are myosepta? | connective tissue that muscle fibers attach to; made of collagen |
| What are epaxials? | muscles in dorsal half (divided by vertical septum) |
| What are hypaxials? | muscles in ventral half |
| How is red muscle different than white muscle? | slow, aerobic oxidation typically along central outside edge of fish; along lateral line large mitochondria abundant myoglobin, higher fat content |
| How is white muscle different than red muscle? | fast, anaerobic glycolysis majority of muscle mass in most fishes lacks myoglobin relatively few, small mitochondria |
| What kind of swimming is red muscle good for? | Long distance swimmers, pelagic fish Tunas, Salmon |
| What kind of swimming is white muscle good for? | Sit and wait predators, sedentary fishes Flounders, pike |
Created by:
barthurs
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