Which of the following tissues are avascular?
A. Epithelial tissue and cartilage
B. Muscle tissue and cartilage
C. Nervous tissue and muscle tissue
D. Bone and cartilage
E. Nervous tissue and bone
A. Epithelial tissue and cartilage
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The synthesis of new organic molecules, involving the formation of new chemical bonds, is called
A) glycolysis. B) catabolism. C) anabolism. D) differentiation. E) lipolysis.
Why is it so difficult to localize sound with only one ear? How does having two ears help to localize sound?
What will be an ideal response?
Your dog is chewing on an adult cow long bone and breaks it open. He pulls out some fleshy material within the diaphysis of the bone. You know that this fleshy material
a. produced red blood cells for the adult cow. b. contains fat. c. was formed from osteoblasts. d. is abnormal and is not normally found in bone.
In excitation-contraction coupling,
A. myosin heads bind to exposed active sites on actin. B. ATP binds to actin myofilaments. C. Ca2+ must bind with myosin to expose active sites on actin. D. movement of the troponin-tropomyosin complex causes actin myofilaments to slide. E. cross-bridges form between myosin heads and Ca2+.