Which of the following statements concerning cross bridges is not correct? Cross bridges
a. cross bridges bind to actin during muscle contraction.
b. cross bridges are formed by the globular heads of the myosin molecules.
c. formation is tied to Cl- levels in the cytosol
d. cross bridges bend during muscle contraction.
e. cross bridges protrude from the thick filaments.
C
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A blockage of the ducts from the parotid glands would
A) reduce delivery of saliva. B) cause mumps-like swelling of the face. C) interfere with carbohydrate digestion in the mouth. D) All of the answers are correct. E) None of the answers is correct.
The diagram illustrates sensory receptors in the skin. What structure does "E" represent?
A. Free nerve endings B. Merkel disks C. Ruffini end organ D. Meissner corpuscles E. Pacinian corpuscle
Describe action potentials
What will be an ideal response?
The arm is attached to the thorax by the ________.
A. pectoralis minor and pectoralis major B. latissimus dorsi and pectoralis major C. biceps brachii and triceps brachii D. pectoralis major and teres major E. supraspinatus and latissimus dorsi