Which of the following muscles is involuntary?
Cardiac muscles are involuntary in function, while skeletal muscles are voluntary.
Ref: NCERT Class 11 Biology Chapter 17: Locomotion and Movement Skeletal System - Axial Skeleton - Ribs Sternum
#involuntary muscle
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Which muscle type is responsible for the movement of the heart?
Cardiac muscle is an involuntary, striated muscle responsible for heart contractions.
Ref: NCERT Class 11 Biology Chapter 17: Locomotion and Movement Muscle - Types and Structure - Myofibril Sarcomere Myofilament
Which muscle type is found in the walls of internal organs?
Smooth muscles are involuntary muscles present in the walls of internal organs like the alimentary canal.
Ref: NCERT Class 11 Biology Chapter 17: Locomotion and Movement Muscle - Types and Structure - Myofibril Sarcomere Myofilament
Which muscle type is involuntary and non-striated?
Answer: C) Smooth muscle. For Tissue-2, once you lock onto the key mechanism or definition, Smooth muscle is the clear fit. If you restate the concept in your own words, Smooth muscle is the option that correctly names the structure, process, or principle asked for in Tissue-2. So Smooth muscle is the clean, accurate selection. If a similar stem appears later, start from the same core fact and you will land on the same kind of answer. In class notes, highlight this same phrase next to the related diagram so the wording and the picture reinforce each other. When you practise, cover the choices first, write Smooth muscle from memory, then reveal the letter — that habit builds real recall for Tissue-2.
Ref: Animal physiology is Unit 7 of the CSIR NET Life Science Syllabus, covering core body systems. It accounts for roughly 10% of the total marks in Sections B and C.