The ________ vena cava carries blood from the shoulders, head, and neck to the right atrium.
Fill in the blank(s) with the appropriate word(s).
superior
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Arrange the following events in proper sequence:
(1) The activating hormone interacts with a membrane-bound receptor. (2) Cyclic AMP causes the cell to carry out a function characteristic for that specific hormone. (3) Adenylyl cyclase catalyzes the transformation of ATP to cyclic AMP. (4) Adenylyl cyclase is activated. A. 1, 2, 3, 4 B. 1, 4, 3, 2 C. 3, 4, 2, 1 D. 1, 3, 2, 4 E. 1, 3, 4, 2
What is the corpus callosum composed of?
A. Ascending fibers B. Short association fibers C. Projection fibers D. Commissural fibers E. Long association fibers
Regarding the oxygen-hemoglobin dissociation curve which of the following is true
a. the greater the PO2 of the blood, the greater the dissociation of O2 from hemoglobin b. at normal resting systemic arterial PO2, hemoglobin is almost 100% saturated with oxygen c. at normal resting systematic venous PO2, only about 75% of the hemoglobin is in the form of deoxyhemoglobin d. more addtional oxygen binds to hemoglobin when going from a PO2 of 60 to 100 mmhg, than is added when going from a PO2 of 40 to 60 mmhg e. as PO2 increases, the saturation of hemoglobin with oxygen increases linearly.
In the bony fish, all heart chambers are contractile except the
A) Sinus venosus. B) Atrium. C) Ventricle. D) Bulbus arteriosus.