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Mixed Quiz
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1The above diagram illustrates a negative feedback mechanism for thyroid hormone release. In this diagram, the thyroid gland acts as:
A)the control center
B)the effector
C)the input pathway
D)the output pathway


2Thyroid hormone acts as:
A)the control center
B)the effector
C)the input pathway
D)the output pathway

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3The above diagram illustrates:
A)the mechanism of steroid hormone action
B)the mechanism of prostaglandin action
C)the mechanism of peptide hormone action
D)all of the above are correct


4In the above diagram, the second messenger is:
A)IP3
B)diacylglycerol
C)calcium
D)all of the above


5The G-protein functions as:
A)a peripheral membrane protein
B)a first messenger
C)a GTP-ase enzyme
D)a ligand





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