Answer the following statements true (T) or false (F)
1. Most inferior rotator cuff muscle is the teres minor.
2. The subscapularis inserts on the greater tubercle and laterally rotates the humerus.
3. Supraspinatus is the largest rotator cuff muscle.
4. The supraspinatus muscles is the most superior rotator cuff muscle.
5. The deltoid is innervated by the axillary nerve.
1. TRUE
2. FALSE
3. FALSE
4. TRUE
5. TRUE
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To synthesize thyroid hormones, iodine is attached to
A. the amino acid tryptophan. B. acetyl coenzyme A. C. cholesterol. D. the amino acid tyrosine. E. the amino acid phenylalanine.
At the peak of an action potential,
a. the electrical gradient for K+ tends to move this ion outward. b. the concentration gradient for K+ tends to move this ion outward. c. K+ permeability greatly increases. d. two of these answers. e. all of these answers.
Somatic motor neurons innervate involuntary effectors.
Answer the following statement true (T) or false (F)
Which statement is true regarding the difference between resting and vigorous activity ECGs?
A) Heartbeat is slower and the QRS segment is higher after exercise. B) Heartbeat is faster and the S-T segment is shorter after exercise. C) Heartbeat is faster and the P wave is higher after exercise. D) Heartbeat is slower and the P-R segment is longer after exercise.