Which of the following acts as an ATPase during the contraction cycle of muscle?
A) actin molecules
B) troponin molecules
C) tropomyosin molecules
D) the head portion of the myosin molecule
E) the tail portion of the myosin molecule
Answer: D
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Composition of the plasma and the interstitial fluid differs chiefly in the concentration of
A) water. B) dissolved oxygen and carbon dioxide. C) glucose and other sugars. D) sodium ions. E) All of the answers are correct.
The intercostal veins drain blood from the intercostal muscles into the ________ vein
A) axillary B) azygous C) subscapular D) internal jugular
If stress lasts longer than a few hours, an individual will enter the ________ phase of the general adaptation syndrome (GAS)
A) alarm B) resistance C) exhaustion D) extension E) prolonged
A joint joined by interdigitating pieces of bone is a:
a. suture b. gomphosis c. symphysis d. synostosis