Name the kind of muscle (skeletal, visceral or cardiac) in each case…
Contributed by StemPy LabTry it on paper first. A hint, the key idea and the worked solution are here when you need them.
Name the kind of muscle (skeletal, visceral or cardiac) in each case. Say whether it is striated, and whether it is voluntary.
- The muscle in the wall of the stomach.
- The muscle that bends the elbow.
- The muscle of the heart.
- The muscle that moves the tongue.
- The muscle in the wall of the oviduct.
Need a reminder? The key ideaShow
Skeletal muscle is striated and voluntary, visceral muscle is smooth and involuntary, and cardiac muscle is striated and involuntary. A muscle is made of bundles (fascicles), a bundle of fibres, and a fibre of myofibrils. A fibre is lined by the sarcolemma, holds many nuclei in the sarcoplasm, and is a syncytium.
The worked solution
Have you tried it?
Work it out on paper first. It is fine to get stuck or make a mistake: that is how we learn. When you are ready, go through the solution one step at a time, and check each step against your own.
Given. Five muscles.
Plan. Use the place of the muscle to find its kind. Then use the kind to find the other two facts.
Step 1. (a) and (e). They lie in the walls of hollow organs: visceral, smooth, involuntary.
Step 2. (b) and (d). They move parts of the body by our will: skeletal, striated, voluntary.
Step 3. (c). The heart: cardiac, striated, involuntary.
Answer: (a) visceral, not striated, involuntary; (b) skeletal, striated, voluntary; (c) cardiac, striated, involuntary; (d) skeletal, striated, voluntary; (e) visceral, not striated, involuntary.
Check. Only the skeletal muscle is both striated and voluntary.
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