1) how many grams of nacl, m.w. 58.5 daltons, are necessary to make 1 liter of 5%
saline?
a) 58.5
b) 1
c) 50
d) 6.02 1023
e) 2.9
2) the portions of a neuron that extend off of the roughly spherical cell body are usually
collectively called
a) protrusions.
b) processes.
c) prostheses.
d) projections.
3) the percentage of cells in blood-producing tissues that become white blood cells is
about ________%.
a) 90
b) 10
c) 50
d) 25
e) 75
4) the motor end plate is
a) a folded area of muscle cell membrane with ach receptors clustered at the top of each
fold.
b) the same as the neuromuscular junction.
c) the same as the synaptic cleft.
d) formed by the membrane of enlarged axon terminals, or boutons, that lie on the
surface of skeletal muscle cells.
e) a special fibrous matrix whose collagen fibers hold the axon terminal in proper
position.
5) match each step in urine formation to its description.
a. excretion
b. filtration
c. reabsorption
d. secretion
movement from the nephron lumen to the blood
6) all of the triplet codes needed to produce exactly one functional piece of rna are
found in one
a) chromosome.
b) gene.
c) codon.
d) anticodon.
e) none of the answers are correct.
7) organic molecules that act as receptors/carriers for the cleaved portion of the
substrate are
a) vitamins.
b) isoenzymes.
c) coenzymes.
d) modulators.
8) the most important chemical regulator of respiration is
a) oxygen.
b) carbon dioxide.
c) bicarbonate ion.
d) sodium ion.
e) hemoglobin.
9) match the ploidy with a cell stage.
a. haploid
b. diploid
mature sperm or egg
10) which class of movement can be considered a combination of the other two?
a) reflex
b) voluntary
c) rhythmic
11) match the type of signal to its description (answers may be used more than once).
a. graded potential
b. action potential
c. both
originate(s) at the trigger zone
12) you are studying for your physiology test with your lab partner. she insists that the
purpose of the knee jerk reflex is to test for neural or muscular damage. state whether or
not you agree with her, and why.
13) the reaction rates of many chemical reactions that occur in the body are controlled
by special protein molecules called ________.
14) water gain during a day comes from either ________ or ________. how is water
lost during a day?
15) ribosomes are composed of protein and ________.
16) the peptide bond formed between amino acids occurs as a consequence of
________.
17) a ________ reflex has at least one interneuron placed between the sensory and
motor neuron.
18) the three sections of the small intestine, in order according to movement of its
contents, are ________, ________, and ________.
19) ________ is the amount of heat generated during the digestion of a meal.
20) a person with cirrhosis of the liver has lower than normal levels of plasma proteins
and a higher than normal gfr. explain why a decrease in plasma protein concentration
would cause an increase in gfr.
21) the combination of fibers and ground substance in supporting connective tissues is
known as ________.