Explain in depth the countercurrent
multiplication and countercurrent exchange
mechanisms. Describe fully their roles in urine
production. Please make reference to osmolality
changes that occur throughout the nephron and also make
note of the loop of Henle.
What is countercurrent exchange? Give an
invertebrate example, both naming the taxon and explaining how it
works and what it achieves. Use a simple figure with labels as well
as some text (in your own words, of course) to explain.
What is a coelom and what advantages does it
provide in animals that have it? Name some phyla that have and do
not have a full coelom. How is the status of having or not having a
full coelom predicted...
The process of exchange between vasa recta and the loop of Henle
has the name countercurrent exchange. What can we conclude from
that name about their flow, by analogy with animal respiration
terminology?
Describe how the countercurrent mechanism of gas exchange works.
You are welcome to include pictures of your own labeled drawings in
your answer but not pictures from other sources. Lastly, briefly
answer this question: What would happen if water moved backwards
through the gills?
HOMUNCULUS: What is the adaptive or evolutionary value to the
amount of space dedicated to each body part? How does the human
homunculus compare to that of other animals? Why?
[REGARDING THE SENSORY AND MOTOR HOMUNCULUS] What is the
adaptive or evolutionary value to the amount of space dedicated to
each body part? How does the human homunculus compare to that of
other animals? Why?
Select the MOST CORRECT answer. Countercurrent exchange...
occurs in the gills of most fish when water and blood flow in
opposite directions allowing gas exchange.
does not require energy for gas exchange, as oxygen and carbon
dioxide move down their concentration gradient.
is a process used in capillary beds of mammalian lungs.
Both a) and b) are correct and c) is incorrect.
a), b) and c) are all correct.
Regarding human reproduction (select the MOST CORRECT
statement):
At the time...
in 350 words, What is the adaptive value of dark skin tones in
equatorial regions such as Africa? What evolutionary pressure
caused a lightening of skin tones away from this area?
1)Why we want to choose 1-2 heat exchange2) Benefits of using many tubes in the heat exchange3) material use for tube4)shell tube5) why we use 1 inch two pass6) the length of tube we use is 6ft7)U tube - Coose BEU and AEU8)tube sheet9) buffle