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Which of the following are involved in external respiration?

The complex network of tiny islands of gray matter in the brain that “awakens” the cerebral cortex is the  


Interneurons are specialized to carry impulses from peripheral receptors into the brain or spinal cord.

Which of the following hormones exerts its effect primarily on the reproductive organs?   

The cells in the testis that produce male sex hormones are called    

If the colloid osmotic pressure of the blood plasma is decreased, the glomerular filtration rate will increase.  
 

Excess fluid is kept from accumulating in tissue spaces by  


Which of the following is not important in the formation of a red blood cells?  
 

The region of receptors on the retina that gives the sharpest vision is the    

If you enter a fish market and smell the strong fishy odor, but the odor quickly seems to fade away, you have experienced