Which of the following tissues has a single nucleus, tapers at both ends and shows involuntary movements?
Correct answer: B. Smooth muscle
- A. Striated muscle
- B. Smooth muscle
- C. Cardiac muscle
- D. Skeletal muscle
Explanation
Smooth muscle fibers are nonstriated, spindle-shaped and have 1 nucleus per cell. Constriction of smooth muscle occurs involuntarily as it is under autonomic nervous control. Contractions of smooth muscle move food through the digestive tracts and push blood through the blood vessels. Thus the correct answer is option B.
Last updated
About Support and Movement
Support and movement covers the axial and appendicular skeleton, bone structure, joints and the arrangement of skeletal muscles. Muscle contraction is explained through actin, myosin, sliding filaments, calcium ions and ATP, while arthritis is distinguished as a disorder of joints rather than a normal part of movement.
Practise Support and Movement
738 free Support and Movement MCQs from Biology, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Exams that ask Biology questions like this
Biology is on 6 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.