KNES 259 Lecture Notes - Lecture 29: Vitreous Body, Aqueous Humour, Ciliary Muscle

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pearshark520

23 Nov 2016

School

University of Calgary

Department

Kinesiology

Course

KNES 259

Professor

Ronald Reed Ferber

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Document Summary

Or a separate call that signals to an afferent neuron. Receptor field: area of the skin that a sensory nerve innervates. Smaller ones found on more sensitive areas of the body. Each type of receptor only responds to one type of stimulus. Mechanoreceptors: respond to mechanical stimuli (touch, pressure, itch, tickling, etc. ) Due to adaptation they respond more to changes than to actual temperature. Intensity: coded for by the frequency of ap"s due to the all-or-none principle of neurons. Higher stimulus will also stimulate more fibres. Adaptation: when a neuron stops sending ap"s or slows down in response to a repeated stimulus. Phasic (fast adapting) receptors respond to changes in stimulus. Will also have a minor negative surge when the stimulus turns off. Tonic (slow adapting) receptors continue to send ap"s in response to repeated stimulus. Localization/acuity: the ability to distinguish between two different stimuli points.

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

KNES 259 Lecture Notes - Lecture 29: Vitreous Body, Aqueous Humour, Ciliary Muscle

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