Myofibrils are what?

Unlock all questions

This demo includes only 20 questions. Upgrade to access hundreds of questions, flashcards, exam simulations, and disable ads.

Full question bankExam simulationsFlashcards
From $24.99Unlock all

Study for the IMAT Biology Exam with focused multiple-choice questions. Use hints and explanations to enhance your preparation. Get ready for your exam success!

Multiple Choice

Myofibrils are what?

Explanation:
Myofibrils are the contractile elements inside muscle fibers, built from long, organized protein filaments arranged into repeating units called sarcomeres. The core filaments are actin (thin) and myosin (thick), which slide past each other during contraction to shorten the muscle. That’s why they’re described as microscopic protein filaments that make up muscle cells. They aren’t nuclei (which house genetic material), ribosomes (protein-making machines), or mitochondria (the cell’s ATP factories).

Myofibrils are the contractile elements inside muscle fibers, built from long, organized protein filaments arranged into repeating units called sarcomeres. The core filaments are actin (thin) and myosin (thick), which slide past each other during contraction to shorten the muscle. That’s why they’re described as microscopic protein filaments that make up muscle cells. They aren’t nuclei (which house genetic material), ribosomes (protein-making machines), or mitochondria (the cell’s ATP factories).

More Multiple Choice Questions
Subscribe

Get the latest from Examzify

You can unsubscribe at any time. Read our privacy policy