Which of the following associations pertaining to the dural venous sinuses is incorrect?
A) arachnoid granulations—calcifications of arachnoid mater within the sinuses associated with arteriosclerosis
B) confluence of the sinuses—near internal occipital protuberance
C) inferior sagittal sinus—located within the falx cerebri
D) sigmoid sinus—continues inferiorly as internal jugular vein
E) occipital sinus—metastases via internal vertebral venous plexuses
Ans: A
You might also like to view...
A patient with high blood pressure is put on a vasodilator, which causes blood vessels to dilate. One of the side effects will be pale, cool skin.
Answer the following statement true (T) or false (F)
Antigen presentation involves the display of an antigen
A. inside the cytoplasm of a B-lymphocyte. B. on the surface of a cell so that a B-lymphocyte can be exposed to it. C. inside the cytoplasm of a T-lymphocyte. D. on the surface of a cell so that a T-lymphocyte can be exposed to it.
Nets should be coarse and stiff in order to catch a fish more easily
Indicate whether the statement is true or false
What you may not know is, turkeys (like most avian species) have BARORECEPTORS. What fun, allows us to apply some PHYS! Assuming blood pressure regulation by aortic baroreceptors in birds is operationally similar to what we see in humans (it is), how would Tom the Turkey's hemorrhage be expected to IMMEDIATELY affect the activity of his baroreceptors?
a. Tom's baroreceptors would increase their rate of firing to all medullary cardiovascular center cell types. b. Tom's baroreceptors would increase their rate of firing to cells in his medulla oblongata (i.e. the Cardiovascular Control Center). In turn, this would cause an increased sympathetic discharge to his heart and an increased parasympathetic discharge to his veins and arterioles. c. Tom's baroreceptors would decrease their rate of firing to cells in his medulla oblongata (i.e. the Cardiovascular Control Center). In turn, this would cause an increased sympathetic discharge to his heart as well as to his veins and arterioles. d. Tom's baroreceptors would decrease their rate of firing to cells in his medulla oblongata (i.e. the Cardiovascular Control Center). In turn, this would cause an increased parasympathetic discharge to his heart and an increased sympathetic discharge to both his veins and his arterioles. e. A hemorrhage would not affect the activity of Tom's barorecepto