Cerebrospinal fluid ________
A) is secreted by the arachnoid villi
B) enters the four ventricles after filling and circulating through the subarachnoid space
C) is secreted mostly by the ependymal cells lining the brain ventricles
D) is continually formed mostly by the choroid plexuses
E) is identical in composition to whole blood
D
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The respiratory pump assists blood movement within the veins of the trunk, because as a person inspires,
A. intra-abdominal and intrathoracic pressure both increase. B. intra-abdominal and intrathoracic pressure both decrease. C. intra-abdominal pressure increases and intrathoracic pressure decreases. D. intra-abdominal pressure decreases and intrathoracic pressure increases.
When ventilation is greater than is needed to remove the CO2 produced by metabolism and pH increases in the blood, this is called __________
Fill in the blank with the correct word.
In the kidney, blood is filtered in the cortex, drains through the renal pelvis into the renal medulla, and from there travels in the ureter to the urinary bladder
Indicate whether the statement is true or false
Which of the following happens during atrial systole?
A. The atria then repolarize and relax. B. The increased pressure pushes blood through the AV valves into the atria. C. Blood rushes in from the vena cavae and pulmonary veins to fill the right and left atria. D. The atria depolarize and contract together creating decreased volume and higher pressure in the atria than the ventricles.