To straighten your arm you must contract this muscle and relax this muscle.

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 $25.99Unlock all

Study for the Muscular System and Skeletal System Exam. Learn with flashcards and multiple choice questions, where each question has explanations and hints. Be well-prepared and confident on your test day!

Multiple Choice

To straighten your arm you must contract this muscle and relax this muscle.

Explanation:
Straightening the arm at the elbow relies on the antagonistic pair of muscles: the triceps brachii and the biceps brachii. The triceps is the muscle that extends the elbow, so it contracts to straighten the arm. The biceps, which flexes the elbow, must relax to allow that extension. The deltoids move the shoulder, not the elbow, and the forearm muscles control wrist and hand movements, not elbow extension. So the correct action is contracting the triceps while the biceps relaxes.

Straightening the arm at the elbow relies on the antagonistic pair of muscles: the triceps brachii and the biceps brachii. The triceps is the muscle that extends the elbow, so it contracts to straighten the arm. The biceps, which flexes the elbow, must relax to allow that extension. The deltoids move the shoulder, not the elbow, and the forearm muscles control wrist and hand movements, not elbow extension. So the correct action is contracting the triceps while the biceps relaxes.

More Multiple Choice Questions
Subscribe

Get the latest from Passetra

You can unsubscribe at any time. Read our privacy policy