The ____________________ cells of the thyroid gland secrete the iodine-containing hormones ____________________ and ____________________, whereas the ____________________ cells of the thyroid secrete the Ca2+-regulating hormone ____________________
Fill in the blank(s) with correct word
follicular, tri-iodothyronine (T3), tetraiodothyronine (T4 or thyroxine), C, calcitonin
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The condition of shock is an example of failure of homeostatic mechanisms to compensate when one or more parts of the reflex control system are damaged.
Answer the following statement true (T) or false (F)
The direction of impulses through the conduction system of the heart is normally
a. AV node->SA node->bundle of His->Purkinje fibers b. AV node->bundle of His->SA node-->Purkinje fibers c. bundle of His->AV node->Purkinje fibers->SA node d. SA node->AV node->bundle of His->Purkinje fibers e. SA node->bundle of His->Purkinje fibers->AV node
Which of the following muscles would be considered an antagonist to the rectus femoris?
A. sartorius B. biceps femoris C. vastus intermedius D. gracilis E. vastus lateralis
A neuromuscular junction is where a ________ and a ________ come together.
A. neuron; myofibril B. muscle fiber; neuron C. T tubule; sarcoplasmic reticulum D. neuron; neuron