Neurophysiology Skills Quiz
(304).jpg "Neurophysiology Skills Quiz")
Do you know that neurophysiology is the study of nerve cells (neurons) as they receive and transmit information? It is a branch of physiology and neuroscience that focuses on the functioning of the nervous system. The word originates from the Greek word νεῦρον meaning "nerve" and -λογία meaning "knowledge". Test your neurophysiology skills in this quiz and improve your knowledge.
- 1.Which of the following statements regarding the taste pathway is FALSE
- A.
CNVII, CNIX, and CNX are primary afferents that synapse at the solitary nucleus
- B.
The parabrachial tract relays the third-order fiber that synapses on the lateral aspect of the parietal cortex
- C.
Brodmann's area 3,1, and 2 receive synaptic innervation from the VPM of the thalamus
- D.
The taste reflex arc from the solitary tract can be in response to a NaCl stimulus
- E.
The solitary nucleus is located anteriorly to the cerebellum
- 2.In the taste pathway, the 7th, 9th, and 10th cranial nerves all synapse on ______________
- A.
Solitary nucleus
- B.
Ganglion nucleus
- C.
Trigeminal nucleus
- D.
Brodmann's area 3, 1, 2
- 3.Which of the following is the correct order for the taste pathway beginning at the anterior 2/3 of the tongue
- A.
Chorda Tympani --> CN VII --> solitary nucleus --> VPM of thalamus --> lateral surface of parietal cortex broadmann's #3,1,2
- B.
Chorda tympani --> CN XI --> solitary nucleus --> VPM of thalamus --> lateral surface of parietal cortex broadmann's #3,1,2
- C.
Chorda tympani --> CN X --> solitary nucleus --> VPM of thalamus --> lateral surface of parietal cortex broadmann's #3,1,2
- D.
Geniculate ganglion --> CN VII --> solitary nucleus--> VPM of thalamus --> lateral surface of parietal cortex broadmann's #3,1,2
- 4.Which of the following is in the correct order for the perceptual taste pathway beginning from the posterior 1/3 of the tongue
- A.
CN IX --> solitary nucleus --> VPM of thalamus --> lateral surface of parietal cortex brodmanns # 3,1,2
- B.
CN X --> solitary nucleus --> VML of thalamus --> medial surface of parietal cortex brodmanns # 44
- C.
CN VII --> Chorda tympani --> solitary nucleus --> VPM of thalamus --> lateral surface of cortex brodmanns #3,2,1
- D.
Inferior ganglion of CN IX --> solitary nucleus ---> salivary nuclei (CN VII, IX)
- 5.Which of the following are factors that are contributed to the final perception of taste (select all that apply)
- A.
Olfactory system
- B.
Tactile input
- C.
Limbic system
- D.
Taste bud activation
- E.
Massecation
- F.
Visual system
- G.
Motor system
- 6.Which of the following is a reason why our thresholds for some tastes are lower than others
- A.
Sour and bitter thresholds are lower, making us super sensitive. ---> usually sour and bitter tastes represent harmful foods
- B.
Sweet and salty thresholds are lower, making us super sensitive ---> usually sweet and salty tastes represent harmful foods
- C.
Sour and bitter thresholds are lower, making us super insensitive. ---> usually sour and bitter tastes represent beneficial foods
- D.
Sour and bitter thresholds are the same as sweet and salty --> we love candy
- 7.Approximately how many taste buds are found in the oral/buccal cavity?
- A.
~5,000
- B.
~ 500
- C.
~50,000
- D.
2
- 8.Select the 3 cell types found WITHIN a taste bud
- A.
Receptor cell
- B.
Supporting cells
- C.
Basal cells
- D.
Wing cells
- E.
Stem cells
- F.
Neuronal cells
- 9.The cells within a taste bud are replaced about every _______________
- A.
10 days
- B.
10 months
- C.
10 hours
- D.
10 years
- E.
10 minutes
- 10.Which of the following taste receptors initiate signal transduction by the influx of Na+ ions through a Na+ channel leading the depolarization of the receptor
- A.
Salty
- B.
Sour
- C.
Bitter
- D.
Sweet
- 11.Which of the following taste receptors initiate signal transduction by the binding of an H+ ion to a leaky K+ channel, closing it. leading to depolarization of the receptor cell
- A.
Sour
- B.
Sweet
- C.
Salty
- D.
Bitter
- 12.Which of the following taste receptors initiate signal transduction by the binding of a substance to a receptor, activating its 2nd messenger system and ultimately DESTROYING cAMP, leading to the closing of K+ channels and membrane depolarization
- A.
Bitter
- B.
Sweet
- C.
Sour
- D.
Salty
- 13.Which of the following taste receptors initiate signal transduction by the binding of a substance to a receptor, activating its 2nd messenger system and ultimately PRODUCES cAMP. this results in the closing of K+ channels and receptor depolarization
- A.
Sweet
- B.
Sour
- C.
Bitter
- D.
Salty
- 14.True or false? taste receptors are incapable of producing an action potential
- A.
True
- B.
False
- 15.Which of the following are the class of primary afferent nerves in the taste pathway?
- A.
III
- B.
IV
- C.
II
- D.
Ia
- E.
Ib
- 16.The taste pathway has an addition branch to the _______________ and _______________ which provides input on pleasure/pain, hunger/thirst/satiety centers
- A.
Hypothalamus; amygdala
- B.
Hypothalamus; thalamus
- C.
Hypothalamus; limbic system
- D.
Wernicke's area; broca's area
- 17.Which of the following nuclei are involved in taste pathways to the centers for pleasure/pain, hunger/thirst/satiety but NOT in perceptual or reflex pathways
- A.
Parabrachial nuclei
- B.
Ventro posteriormedial nucleus of thalamus
- C.
Parietal nucleus
- D.
CN VII nucleus
- 18.The area of the human olfactory epithelium is ~ ___________________ mm2
- A.
50
- B.
5
- C.
100
- D.
10
- 19.True or false? the receptor cells of the olfactory system are incapable of generating an action potential
- A.
True
- B.
False
- 20.FUN FACT Q: dogs have _________x more olfactory epithelium than humans and can smell ________
- A.
20; 7 miles away
- B.
5; 7 feet away
- C.
20; 7 minutes away
- D.
5; 7 miles away
- 21.Olfactory receptor cells, transduce a signal via:
- A.
A second messenger system and is slower than other systems
- B.
Primary messenger system and is faster than other systems
- C.
Graded membrane potential and is faster than other systems
- D.
Na+/K+ channels and is slower than other systems
- 22.The primary afferent neuron of the olfactory epithelium is
- A.
Group ia
- B.
Group II
- C.
Group III
- D.
Group IV
- E.
Group Ib
- 23.The thalamus is the major source of sensory information to the primary sensory cortex for all senses
- A.
True
- B.
False
- 24.Which of the following is NOT a unique characteristic of the sensory olfactory system
- A.
Information is sent to the cortex first then the thalamus
- B.
Receptor cell is a neuron
- C.
Only two cell in the pathway
- D.
Information is sent to the thalamus first, then the cortex
- 25.Light "crude" touch and pressure (tickle, itch), as well as sexual stimulation, use which 2 afferent neurons groups
- A.
Group III
- B.
Group IV
- C.
Group II
- D.
Group Ia
- E.
Group Ib
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