CSB332H1 Study Guide - Midterm Guide: Taste Bud, Olfactory System, Olfactory Tract

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coppercattle724

17 Aug 2012

School

UTSG

Department

Cell and Systems Biology

Course

CSB332H1

Professor

Melanie Woodin

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Document Summary

Csb332h1s l20 (no l19, prof took up test instead); march. 28, 2012. Ca influx opens cl channel cl leaves more depolarization. Olfaction depends upon chemical amplification in order to yield sensitivity. Chemical amplification - 2nd msger pathways in which enzymatic cascades produce large #s of intermediate products to be activated (ex. camp) Increasing by 1000x the effect of one activated rec molec. Humans can discriminate odors due to 1000s of dif olfactory recs. Each olfactory rec recognizes spectrum of odors rather than being highly selective. Each particular odorant rec is found in restricted area of olfactory epithelium: dif families of r genes expressed in zones extending along length of epithelium. Neurons from lateral olfactory tract project to: limbic system (amygdala, entorhinal cortex, hippocampus, subiculum). Ancient region of brain (motivation, emotion, certain kinds of memory) Cues to lay down & recall these memories: thal frontal cortex for recognition, to primary olfactory region for processing.

Related Questions

Sensory systems

1.All sensory input arrives at the central nervous system in the same form, as ____________ propagated by afferent neurons. Perception of the type and intensity of a stimulus depends on which part of the brain the impulse projects to and the firing frequency the sensory neuron.

A.action potentials B.receptor potentials C.reflexes D.frequency localizations E.thresholds

2.The simplest sensory receptors are __________ that respond to mechanical distortion,changes in temperature, or specific chemicals.

A.nociceptors B.free nerve endings C.gated channels D.photoreceptors. E.ganglia

3.When membrane proteins on an olfactory neuron are stimulated by the binding of a specific chemical, what is the immediate result?

A.membrane depolarization B.membrane repolarization C.active ion transport D.membrane hyperpolarization E.neurotransmitter release

5.The lateral line system provides ________ with a sense of "distant touch," enabling these animals to sense objects that reflect pressure waves and low-frequency vibrations.

A.adult amphibians B.reptiles C.birds D.mammals E.fish

6.Which correctly represents the sequence of steps involved to convey sensory information to the CNS?

A.stimulation and ion flow through the synaptic cleft B.neurotransmitter release and interpretation
C.neurotransmitter release and ion flow through the synaptic cleft D.stimulation, transduction, transmission, and interpretation E.stimulation, transmission, and neurotransmitter release

7.Which of the following stimuli do vertebrates NOT have a specialized receptor for?

A.hearing B.taste C.smell D.humidity E.vision

8.Which of the following is NOT an example of a mechanoreceptor?

A.Meissner's corpuscles B.Ruffini endings C.Merkel cells D.red corpuscles E.Pacinian corpuscles

9.What are the receptors called that transmit impulses that are perceived by the brain as pain?
A. baroreceptors B. chemoreceptors C. nociceptors
D. thermoreceptors E. propioceptors

10. Which of the following do humans NOT have taste buds specialized to sense?

A. salty B. sour. C. sweet. D. vitamins E. bitter

Help please, read questions CAREFULLY before answering

1)Which of the following is true about confabulation?

A)Confabulation is seen in persons who simply mix up theirmemories

B)Confabulation is intentional

C)Patient H.M. shows severe confabulation

D)Korsakoff's patients fail to show confabulation

E)Confabulation is the report of a fictitious event by a personwith amnesia

2)Imaging studies indicate that neural activity within the____________is increased by _______.

A)Nucleus accumbens;presenting stimuli associated with money

B)Striatum; presenting stimuli assocaited with money

C)Striatum; food for a satiated rat

D)Nucleus accumbens; men viewing pictures of beautiful women

E) A and D are correct

3)Most sensory systems have a crossed representation. Oneexception to this rule is:

A)Visual

B)Auditory

C)Somatosensory

D)Olfactory

4)A(n) _______ is a simple system that works on known principlesthat can be used to explain a complex system.

A)Syllogism

B)Assumption

C)Prottype

D)Model

E)Hyothesis

5)Neurotransmitter

A)Is the process of neural communication

B)Is the chemical released at synapses

E)Is the location of cellualr DNA

D)Is the chemical used at gap junctions

aquamarineherring596

3. Determine the necessity for a one-to-one correspondence between a specific representation in the mind and a physicochemical condition in some specific neurons/synapses in the associated brain. 4. Analyze fundamental differences between representations from: (a) Visual stimuli vs. those from speech stimuli; (b) Experienced stimuli (instantiated; things that happened externally, the last pizza you ate) vs. imagined stimuli (uninstantiated; anticipating-imagining something for dinner that you've never had before).

CSB332H1 Study Guide - Midterm Guide: Taste Bud, Olfactory System, Olfactory Tract

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