1) nervous tissue consists of two general types of cells: nerve cells and glial cells. glial
cells are mitotic, whereas neural cells are not (excluding the small population of stem
cells). which type of cell is most likely to be involved in brain cancer, and why?
2) list and describe the two types of retinal bipolar cells and how they respond
differently to the same neurotransmitter?
3) a professor gave the following analogy of kidney function to his freshman biology
class: “imagine your desk is a disorganized mess, containing things worth keeping and
things you should throw out. instead of picking through each item one by one and
considering if it is to keep or toss, you sweep your arm across your desktop in one
smooth motion, knocking the entire contents of the desk into your large trash can. then
you pull the items you want to keep out of the trash can and place them back on your
desk.” in what ways is this analogy accurate? in what ways is it inaccurate? some
students in his class argue that the kidneys are inefficient and poorly designed. how
should the professor respond? what modern medical device may he cite in his response?
4) what are the symptoms and causes of cushing’s disease? how do they compare and
contrast with symptoms and causes of addison’s disease?
5) explain why glucose or other simple sugars should not be the sole source of energy in
our diets. what is the best approach to meeting energy needs?
6) on the row of cells indicated below, match a-e to the terms in the following question.
figure 3.1
cytosol
7) billy has been serving in a noncombat position in the army for two years and has just
been informed that he is leaving on a combat mission tomorrow. billy is feeling very
stressed. how has his endocrine system responded to this bad news? which hormones
are involved, and what effects do they have?