Why must tropomyosin cover the thin filament in just the right position before the muscle can relax?
A) It is needed in the proper location, or ATP cannot be used.
B) It covers the myosin-binding sites and, if left exposed, will allow the myosin to bind and pull.
C) Without tropomyosin in the correct position, calcium cannot be released.
D) It has a particular binding place that facilitates the removal of calcium.
Answer: B
You might also like to view...
Substances that are naturally produced by certain microorganisms that can inhibit or destroy bacteria are called ________.
A. synthetic drugs B. semisynthetic drugs C. narrow-spectrum drugs D. antibiotics E. broad-spectrum drugs
What is recombinant DNA?
A) A segment of DNA containing sequences from two different sources B) DNA that comes from plasmids C) DNA that can no longer replicate D) DNA that is circular
One characteristic of animal development is the specialization in both structure and function that cells undergo. This is called
A) direct development. B) placental development. C) differentiation. D) indirect development. E) internal development.
What is a canaliculus?
A. the large cavity inside a long bone B. a type of bone forming cell C. a stress plate in spongy bone D. a small channel in the matrix of bone E. a fibrous connective covering of bone