How does the sliding mechanism of the sliding filament theory work?
What will be an ideal response?
When the myosin heads of the thick filaments bind to the active sites on the thin filaments, sliding occurs. When the filaments are bound, cross-bridging occurs, causing the myosin heads to pivot toward the M line, pulling the thin filaments toward the center of the sarcomere. The cross-bridge then detaches and returns to the original
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A foreign microorganism that may cause disease in humans is called a(n)
A) pathogen. B) antigen. C) antibody. D) pathology. E) plaque.
Growth hormone
a. directly stimulates bone growth. b. exerts its effects on bones via somatomedin release. c. promotes closure of the epiphyseal plate. d. both (a) and (c) above. e. both b) and (c) above.
Insulin:
a. is made by beta cells in the pancreas b. has the opposite effect of glucagon c. decreases the blood glucose level d. all of the above
An individual who becomes dehydrated will have an elevated hematocrit. Explain how dehydration leads to an elevated hematocrit although blood cell production is normal.
What will be an ideal response?