MCQ
In living beings, ammonia is converted into urea through.
- ✓Ornithine cycle.
- BCitrulline cycle.
- CFumarine cycle.
- DArginine cycle.
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$(i)$ These muscle fibres taper at both ends and do not show striations.
$(ii)$ The wall of internal organs such as the blood vessels, stomach and intestine contain this type of muscle tissue.
$(iii)$ They are 'involuntary' as their function cannot be directly controlled.