Answer:
Produced by the choroid plexus -T.This is the major secretion site.It is also produced in smaller quantities in the interstitial compartment.
Blocks blood toxins from brain tissue-F, that is the job of the blood brain barrier(BBB).
Supplies oxygen to the brain tissue-T.This gas is dissolved in the CSF together with CO2 for distribution among nervous tissues by the CSF
Maintains the concentration of glycine surrounding the brain-T
Found in the ventricles of the heart and brain-False,it does not reach the heart ventricles.This are occupied by blood.
Prevents concussions-T
Produces antibodies in response to antigen exposure in the brain tissue-False.These are produced by the B-cells, not by in the CSF,based on the specif antigen stimulation.
Effectively decreases the brain's weight-T It reduces the weight of the brain.This is done by the buoyancy it provided for the brain.
Compared to levels in the blood plasma, the CSF is higher in glucose-F.This is wrong, the glucose of the blood plasma is higher.But equal sodium ion,more chloride in CSF, and less protein.It s levels is a relefection of blood glucose.Although it may lag 2-4hrs in the CSF.
It prevents concussion,(T)and and the contraction of cardiac muscles propels its movement(T).
Explanation:
Answer: point c is the answer
Not as many people die at a young age therefore increasing the population and birth rate because more people are able to have children.
Answer:
I only know 1 They both are paraphyletic.
Explanation:
Answer:
B) The rabbits with medium length legs are the most stable and thus will out survive the others.
D) It is unlikely that evolution is occurring because none of the traits have disappeared from the population.
Explanation:
The graph shows that rabbits with longer legs are more likely to have a selective advantage that allows them to survive and reproduce than shorter legs. Throughout the generations, it shows that the number of short legs have decreased, and the number of medium length legs neither have advantage or disadvantage.