Koofer (1) - it'S ty of North Texas De pt of 8,o,cg.ca...

.,
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ty
of North Texas Dept.
of 8,o,cg.ca Sce"ces
An i mal PhysIoIoO
Fall 2003
Name: __________
~ J
__________ _
BIOLOGY 3800 ANIMAL PHYSIOLOGY - Fall 2003, Exam 1
Section 1: True /False 1 point each
1. During synaptic activity, the postsynap ti c potential lasts longer than the postsynaptic
current .. .. .... .. .. ............... ..... ........... ..... ........... . ........... ........ .. .......... ............. ... .;
=
2. Diffusion transport requires heat (mole cu lar mo tion) as the direct source of energy ..... .... .
r
=
3. Diffusion of molecules is not defined unless a membrane is present... .. .. .... ............ .. ........ -
r
4. Microglia are resident macrophages in the ce ntral nervous system ..... ............... .. ....... -
=
5. The bond strength between carbon ato ms in a sugar molecule at room temperature is
between than 10 and 16 kcal/moL .......... .. ..................................... .. ......... ... ..... ... ........... .. ... -
.
6. Gap junctions are epefled by calcium ions .. . ....
! .. ... • ... ..... ...... .......... ......... . ..... .... ..... .. . ....... .. -
=
7. Cells-swell and may even lyse in a 0.9 osmolar solution .....
:;. . ~
....
':<: ...... .. ........ .. ........ .. ..... .... -
=
8. The serosal and mucosal sides of an ep ithe li um must be symmetric for all functions ..... .. . -
=
9. Sucrose and glucose in water form an electrolyte .................................... .. ........... .. ........... -
=
10. The intermediate filaments in ce ll s are composed of phospholipids ........... .. .......... .. ...... .. .. T
=
1'1. Aleons of motor neurons are very specific: th ey fo rm onty one (large) synapse
with one musde fiber (or musde ce ll ) .. .......... .. ......... .. .. .. ................. .. ............... .. .. .............. - F
12.
The
water molecule is a neutral bu t polarized molecule .. .................... .. ............................ -
F
13. The smooth endoplasmic reliculum in the axon participates in Ca++ regulation .. .. .
0
=
14. Tetrodotoxin causes an immediate (le ss than 10 sec) loss of membrane po tential
in all nerve cells .............. .. .......................... ... .................................................. .. ........... . F
15. The rising phase of the action pote nti al is generated primarily by the influx of
potassium ions. .. .. ....... ... .... .. .. ........ ..... ........ .... ............................ ...... ... .. .. .. ........... .. ... - F
16 . The falling phase of the action poten ti al is generated by the influx of negative chloride
ions which retum the potential to a negative value inside neurons. ....... .. ............. .. T F
17. Graded potentials are generalty set f-propagating and travel long distances without
decrement. ................. .. ............................................ .. ................... .. ................. ... .. ... .. . F
18. Without the sodium pump, individual ac ti on potentials cou ld not retum to the rest in g
potential level. ........... .......... ........... .. ........................... .. .. ..................... ........ .. . T F
19.
The vestibular apparatus consists of the semicircular canals, utriculus, and saccu lu s .....
i
F
20 . If a depola ri zation at the axon hillock reaches threshold, an action potential must
follow ............... .. . .. .. ............................................ .. . .. ... ... .. .. . .. ................... .. .. ................ .. T F
21. The conduction velocity of an action potential along an axon depends primarily on
the axon length and on myelinati on ............................................... ... .. ........................ ... T
f
22. Microtubules have a diameter of approximately 250 Angtroms .. ......... .. ....................... .. .. ..
cr>
F
23. The process of synthesizing messenger RNA from DNA is ca l led "Translation· ... .. ............ T
24. The primary structure of a protein deals with the grouping and binding of large
protein subunits . .. .. ............ .. . ...... ................................ ... ........................ .. .. ... .. ................ .. . T
._ 25. Because of their hydrophobic structure, none of the different dasses of lipids are able
If
If
to interact with wa ter . ... .. ........................ ... .................................... .. ............................... . T F

University of North Texas Dept. of BiOlogical Sciences,
Animal Physiolog
Fall 2003
Section 2: Identity or Match 1
pt
each
use the following for questions 26-32; use (0) if
no
match is possible
(1) tight junction; (2) desmosome; (3) zonula adherens; (4) paracellular; (5) transcellular; (6)
synaptic junction; (7) serosal; (8) mucosal; (9) gap junction;
(10) microvilli; (11) endocytosis: (12) exocytosis.