Exam (elaborations)
BIMS 4323 COMPLETE EXAM 2 (RATIONALE Q&A ANSWERED CORRECTLY) 2024/2025
- Course
- BIOL 4432
- Institution
- Texas A&M University - Corpus Christi
BIMS 4323 COMPLETE EXAM 2 (RATIONALE Q&A ANSWERED CORRECTLY) 2024/2025
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BIMS 4323 COMPLETE EXAM 2 (RATIONALE Q&A ANSWEREDCORRECTLY) 2024/2025
1. The lower portion of the midbrain contains the:
a. Medulla
b. Hypothalamus
c. Pons
d. Tectum
e. Thalamus
f. None of the above
2. Which brain structures are localized at the level of the cerebral aqueduct ?
a. Cerebellum and pons
b. Dorsal and ventral horns
c. Medulla
d. Thalamus and Hypothalamus
e. None of the above
3. Which of the following events occurs at the level of a taste cell for saltiness?
a. Passage for Na+ ions through Na+ permeable ion channels
b. Depolarization of the membrane potential
c. Depolarization-induced opening of voltage gated Ca 2+ channels
d. Release of neurotransmitter from taste cell
e. All of the above
4. Which of the following neurotransmitters have tryptophan as a precursor?
a. Adrenaline
b. Dopamine
c. Glutamate
d. Noradrenaline
e. GABA
f. All
g. None
5. The pons is part of the
a. Diencephalon
b. Hindbrain
c. Midbrain
d. Telelcephalon
e. None
6. Which is the second messenger that mediates olfactory reduction?
a. ATP
b. AMP
c. Cyclic AMP
d. GTP
e. GMP
f. Cyclic GMP
g. None
7. What is the brain structure to which the olfactory receptor cells project?
a. dorsal horns of spinal cord
b. ventral horns of the spinal cord
c. gustatory nucleus of the medulla oblongata
d. Olfactory receptor cells do not project to any of the above
, 8. Which of the following features about the fovea is correct?
It contains only cones photoreceptors
9. When rod photoreceptors are exposed to light, which of the following
molecules is activated?
-Phosphodiestarase
10. The neurotransmitter glycine derives from :
a. Alanine
b. Glutamate
c. Valine
Tryptphan
Tyrosine
None
11. The optic nerves contain axons of this type of cells :
Ganglion cells
12. Which neurotransmitter is released by rods?
a. Acetylcholine
b. Dopamine
c. GABA
Glutamate
d. Serotonin
e. None
13. Which of the following ions sustains the dark current in the rod
photoreceptors?
Na+ ions
14. The nicotinic receptor of the neuromuscular junction, which subunits bind
acetylcholine? The alpha subunits
15. The GABAA receptor is permeable to: Cl- ions
16. Which is the definition of the process by which an environmental stimulus
causes an electrical response in sensory receptor cells?
a. Transection
b. Transition
c. Transaction
d. Transduction
e. None
17. toxin question
The synapse stops working because the vesicles are intact but cannot be
released.
18. Acetylcholine binds a nicotinic postsynaptic receptor. The resting membrane
potentials of the postsynaptic cell is -65mV? Which is correct?
More Na+ enters than K+ exits the cell and there is a net depolarization
19. Which membrane receptors are blocked by atropine?
a. dopamine receptors
b. GABAA receptors
c. Glutamate receptors of AMPA type
d. Glutamate receptors of NMDA type
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