Which of the following are involved in the regulation of cross bridge attachment activity?
a. calcium ions
b. troponin
c. tropomyosin
d. all of the above
e. only b and c
D
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If the thyroid were to develop abnormally and lack most of its extracellular folds, secretion of calcitonin would be severely below normal.
Answer the following statement true (T) or false (F)
The effect of acetylcholine can be stimulating or inhibiting. Which of the following gives the best explanation for why this is so?
A) Acetylcholine has many different forms. B) Acetylcholine has a "dose effect". Larger doses are stimulating while small doses inhibit. C) Postsynaptic cells have a dynamic and changing metabolism and respond differently at different times. D) Different post synaptic cells will have different receptors.
Why does the administration of epinephrine ease the respiratory difficulties of a person with bronchitis?
What will be an ideal response?
A charged amino acid tends to decrease a protein's solubility in water.
Answer the following statement true (T) or false (F)