Where was the number density of touch receptors the greatest on the areas you tested?
The face, lips, fingertips = highest density of touch receptors.
Which region of the integumentary system contains the greatest number of touch receptors?
The most sensitive mechanoreceptors, Merkel’s disks and Meissner’s corpuscles, are found in the very top layers of the dermis and epidermis and are generally found in non-hairy skin such as the palms, lips, tongue, soles of feet, fingertips, eyelids, and the face.
Why does the density of touch receptors vary throughout the body?
Touch sensitivity varies in different body regions because of differential density of distribution of the specific nerve endings. Areas such as the fingertips and lips (glabrous skin) are richly endowed with nerve endings and are very sensitive.
Which of the following areas of the retina has the greatest density of receptors?
In the fovea, cone density increases almost 200-fold, reaching, at its center, the highest receptor packing density anywhere in the retina. This high density is achieved by decreasing the diameter of the cone outer segments such that foveal cones resemble rods in their appearance.
What is receptor density?
The greater number of cutaneous receptors in an area (receptor density), the greater the tactile sensitivity of that area. An area of skin with a greater density of touch receptors is more sensitive to touch and can discriminate between two points closer together than an area with a lower density of touch receptors.
Where does the perception of touch and temperature occur quizlet?
– Perception of touch and temperature occur in somatosensory cortex.
Where is the touch receptor?
the skin
Touch receptors are a subtype of sensory neuron that are located in the skin and possess specialized endings that respond to mechanical stimulation. As part of the somatosensory system, touch receptors therefore transmit information regarding tactile stimuli to the central nervous system.
Which has the densest light touch receptors?
In humans, touch receptors are less dense in skin covered with any type of hair, such as the arms, legs, torso, and face. Touch receptors are denser in glabrous skin (the type found on human fingertips and lips, for example), which is typically more sensitive and is thicker than hairy skin (4 to 5 mm versus 2 to 3 mm).
Where is the most sensitive skin on your body?
The forehead and fingertips are the most sensitive parts to pain, according to the first map created by scientists of how the ability to feel pain varies across the human body.
Where in the retina would you find the greatest density cells mm2 of cone photoreceptor cells?
The fovea contains the highest density of cone photoreceptors in the retina (199,000/mm2); the numbers drop to about 50% (100,000/mm2) by 500 μm (c. 1.75 deg) from the fovea centre and to less than 5% (<10,000/mm2) at about 4 mm (c. 20 deg) eccentricity (Curcio et al., 1991).
