Compare and contrast the different types of muscle contractions. Include the following in your answer : isotonic, concentric, eccentric, isometric, load, force, and tension. You may want to create a table as part of your answer
What will be an ideal response?
Isotonic contractions involve a change in muscle length even though the tension in the muscle does not change. The muscle is getting either shorter or longer but maintains the same tension. In concentric, isotonic contractions, the contracting muscle provides enough force to overcome the load and is able to shorten. In eccentric, isotonic contractions, the muscle's force is less than the load being moved, and the contracting muscle is getting longer. In isometric contractions, there is no change in muscle length, but tension may or may not vary. However, the force exerted by the muscle is always less than the load when performing an isometric contraction; therefore, the muscle will not change length.
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Which of the following statements pertaining to the cervical esophagus is incorrect?
A) The recurrent laryngeal nerve supplies somatic innervation. B) It begins at the inferior border of the cricoid cartilage. C) Its associated veins drain into the inferior thyroid veins. D) Perforations typically heal completely, without surgery and without serious complications. E) Dysphagia is the most common symptom associated with cancerous infiltration.
Match the following:
A) Celiac trunk B) Internal carotid artery C) Radial artery D) Brachiocephalic trunk E) External iliac artery 1) Gives rise to the right common carotid and right subclavian artery. 2) Supplies the lower limbs. 3) Common site to take the pulse. 4) Major supply to the cerebral hemispheres. 5) Large unpaired branch of the abdominal aorta that supplies the liver, stomach, and spleen.
The light band of a skeletal muscle is known as the ________.
A. Z disc B. H band C. A band D. I band
Muscles located entirely within an organ are called
A) internus. B) extrinsic. C) profundus. D) intrinsic. E) externus.