A(n) ________ epithelium allows gas exchange in the lungs
Fill in the blank(s) with correct word
simple or simple squamous
You might also like to view...
In the figure above, G1 is represented by which numbered part(s) of the cycle?
A) I or V B) II or IV C) III only D) IV only E) V only
Which of the following is the correct sequence of events in cross-bridge cycling?
A. Myosin cross-bridge binds to actin, the powerstroke moves the thin filament relative to the thick filament, ATP binds to myosin and cross-bridge detachment occurs, ATP is hydrolyzed and the myosin head is "cocked." B. The powerstroke moves the thin filament relative to the thick filament, myosin cross-bridge binds to actin, ATP binds to myosin and cross-bridge detachment occurs, ATP is hydrolyzed and the myosin head is "cocked." C. Myosin cross-bridge binds to actin, ATP is hydrolyzed and the myosin head is "cocked," the powerstroke moves the thin filament relative to the thick filament, ATP binds to myosin and cross-bridge detachment occurs. D. Myosin cross-bridge binds to actin, ATP binds to myosin and cross-bridge detachment occurs, the powerstroke moves the thin filament relative to the thick filament, ATP is hydrolyzed and the myosin head is "cocked." E. These events can occur in any sequence without affecting muscle function.
While having lunch with a group of students who have also just read this module, one of your peers advises the rest of you to skip your turkey sandwiches because “turkey contains tryptophan, which is absorbed by your cells and makes you sleepy, and if you’re sleepy, you won’t pass the module quiz.” Yours isn’t a turkey sandwich, but you remember reading about tryptophan in the section on Prokaryotic Gene Regulation. Which of these statements is true?
a. only E. coli bacteria contain tryptophan b. tryptophan cannot be absorbed by prokaryotic cells c. E. coli synthesize more tryptophan when it is present d. E. coli can synthesize tryptophan when it is absent
A type of genetic flow called the founder effect occurs when a small number of individuals from a
large population form a new colony. _________ Indicate whether the statement is true or false.