Fatigue-free muscles are:
Correct answer: C. Cardiac
- A. Striped
- B. Unstriped
- C. Cardiac
- D. Triceps
Explanation
The correct answer is 'Cardiac' because cardiac muscles are uniquely adapted to contract continuously throughout a person's life without tiring. They have a high density of mitochondria, which provides the energy needed for sustained activity. In contrast, striped (skeletal) muscles are voluntary and can fatigue with excessive use, unstriped (smooth) muscles can also fatigue under certain conditions, and the triceps are a specific group of skeletal muscles that can tire with activity.
This question appeared on the ETEA MDCAT 2012 paper, which you can sit online with every answer explained.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
About Muscles
Muscles covers skeletal, smooth and cardiac muscle, their microscopic structure and the roles of tendons, myofibrils, actin and myosin. It explains the sliding filament mechanism, sarcomere shortening, neuromuscular transmission and calcium regulation, while distinguishing voluntary skeletal movement from involuntary contraction in smooth and cardiac muscle.
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.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Biology questions like this
Biology is on 8 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Muscles questions
Which feature is possessed by smooth muscles?
The cell membrane of a muscle cell is:
Which of the following is NOT found in skeletal muscle fibers in humans?
The Bicep muscle is attached to the humerus by:
Myoglobin is found in:
Which of the following is a muscle component that acts as a store for energy?