Olfaction (Smell)

Directions:
Select the BEST response alternative for each of the questions below.


1. An ________ is a molecule defined by its physiochemical characteristics and is capable of being translated by the nervous system into the perception of a smell.
A) odor
B) odorant
C) olfactory entity
D) astringintary stimulus
E) olfactant
2. The ________ is a narrow space at the back of the nose in which air flows and where the main olfactory epithelium is located.
A) olfactory sensory neuron (ONR)
B) odorant receptor (OR)
C) olfactory mucosa
D) olfactory bulb
E) olfactory cleft
3. The cilia are the:
A) last structures in the biochemical chain of events involved in odor perception.
B) first structures involved in olfactory signal transduction.
C) most important type of epithelial cells.
D) axons involved in the firing of action potentials in the olfactory process.
E) cells that carry olfactory information to the thalamus.
4. The ________ is a bony structure riddled with tiny holes, at the level of the eyebrows, which separates the nose from the brain.
A) glomerulus
B) olfactory mucosa
C) olfactory bulb
D) olfactory epithelium
E) cribriform plate
5. The ________ is the blueberry-sized extension of the brain, just above the nose, where olfactory information is first processed.
A) epithelium
B) olfactory bulb
C) glomerulus
D) olfactory cortex
E) thalamus
6. The brain region responsible for processing smell is known as the
A) amygdala.
B) parietal lobe.
C) primary olfactory cortex.
D) occipital cortex.
E) thalamus.
7. The limbic system is a group of neural structures that is involved in many aspects of:
A) emotion and memory.
B) odor detection.
C) odor adaptation.
D) pain regulation involving odors.
E) odor habituation.
8. The shape-pattern theory of olfaction is based on the idea that
A) every perceived smell has a different vibrational frequency.
B) the olfactory receptors can change their shapes to fit the odorants' shapes.
C) the firing pattern of neurons in the olfactory bulb is not important to odor perception.
D) odorants' shapes fit into the olfactory receptors' shapes.
E) the olfactory bulb recognizes specific patterns of odors.
9. The ________ is the part of the brain responsible for processing olfaction and for assigning affective value to stimuli.
A) orbitofrontal cortex
B) prefrontal cortex
C) temporal lobe
D) occipital lobe
E) thalamus
10. Which of the following is a chemical sensing organ at the base of the nasal cavity with a curved, tubular shape in mammals?
A) Orbitofrontal cortex.
B) Prefrontal cortex.
C) Main olfactory bulb.
D) Accessory olfactory bulb.
E) Vomeronasal organ.


End of Quiz!

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The correct answers are marked by a "C" in the box before each question. The incorrect questions are marked by an "X".