1) if an axon has an absolute refractory period of 2 msec, what is the maximum
frequency of action potential (ap) production in that neuron?
2) your roommate sally has just found out her mother has high cholesterol. knowing
that health problems often run in families, sally has decided to eliminate cholesterol
from her diet. her goal is to have no cholesterol in her body. she has asked you for
advice on achieving this goal. is her goal realistic? explain. what information should
you give her to help her establish a more realistic goal? assuming she could banish
cholesterol from her body, what would be the endocrine consequences?
3) name four questions related to heart function that you could answer by examining an
ecg and one abnormal condition that may be indicated by each function.
4) ionic bonds are considered to be strong chemical bonds. yet, ions dissociate in water.
explain this apparent contradiction.
5) membrane protein pores that are essentially always open are called ________ or
________ channels.
6) what is the induced-fit model? list the types of bonds involved and classify them as
strong or weak.
7) name the process of red blood cell production, the hormone that controls it, the
source of that hormone, and the stimulus for its production. why was the hormone so
difficult to isolate and identify?
8) when fluid flow through the distal tubule increases as a result of increased gfr, the
macula densa cells send a chemical message to the neighboring afferent arteriole. the
afferent arteriole constricts, increasing resistance and decreasing gfr. this type of
autoregulation involving both the kidney tubule and the arteriole is known as ________.
9) the lipoprotein most likely to be called “good (or healthy) cholesterol” is ________.