Lab 8 human sensory systems

The disturbed inner hair cells will then activate the cochlear nerve fibers.

Sensory system lab activity

In the elderly careful monitoring of appetite is necessary due to the alterations in the olfactory function. Olfactory System Olfaction is the sense of smell. The basic circuitry of the retina incorporates a three-neuron chain consisting of the photoreceptor either a rod or cone , bipolar cell, and the ganglion cell. Lightly resting atop the longest cilia is the tectorial membrane, which moves back and forth with each cycle of sound, tilting the cilia and allowing electric current into the hair cell. This dense body is surrounded by synaptic vesicles and is thought to aid in the fast release of neurotransmitter. Mechanoreceptors are classified in terms of their adaptation rate and the size of their receptive field. The middle ear in humans is very much like a specialized paranasal sinus, called the tympanic cavity, it, like the paranasal sinuses, is a hollow mucosa lined cavity in the skull that is ventilated through the nose. Underwater, hearing is by bone conduction and localization of sound appears to depend on differences in amplitude detected by bone conduction. Light is concentrated from the eye and passes across these layers from left to right to hit the photoreceptors right layer. Depending on the movement, the hair cell can either hyperpolarize or depolarize.

Process of Equilibrium Equilibrioception or sense of balance is one of the physiological senses. In this method, the odor's concentration is increased until the participant is able to sense it, and subsequently decreased until the participant reports no sensation.

senses lab anatomy and physiology

Examples of neurotransmitters are acetylcholine, norepinephrine, dopamine, and serotonin. The opening of the Eustachian tube is also within the middle ear. There are 20 cold points per square centimeter in the lips, 4 in the finger, and less than 1 cold point per square centimeter in trunk areas.

senses lab activity

Since they are rapidly adapting or phasic, the action potentials generated quickly decrease and eventually cease. The basic circuitry of the retina incorporates a three-neuron chain consisting of the photoreceptor either a rod or conebipolar cell, and the ganglion cell.

sensory systems lab
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The sensory system: More than just a window to the external world