Question 1

Which term describes the perception of the position and movement of our limbs in space?

Accepted Answer

Kinesthesis refers to the sense that detects bodily position, weight, or movement of the muscles, tendons, and joints, enabling the perception of the position and movement of our limbs in space.

Question 2

Proprioception is perception mediated by

Accepted Answer

B

Question 3

Which functionality would be most affected if you lost your SA I (Merkel) touch receptors?

Accepted Answer

Merkel receptors (SA I) are specialized for detecting fine details and textures on the surface of objects, making them crucial for tasks like reading Braille or discerning patterns and forms by touch.

Question 4

Which functionality would be most affected if you lost your FA I (Meissner) touch receptors?

Accepted Answer

The answer of Which functionality would be most affected if...

Question 5

Which functionality would be most affected if you lost your SA II (Ruffini) touch receptors?

Accepted Answer

Ruffini endings, or SA II receptors, are primarily involved in detecting skin stretch, which contributes to the perception of finger position and the pressure exerted on the skin, such as when holding an object. They help in perceiving the continuous pressure and are important for proprioception and the control of finger position and movement.

Question 6

Which functionality would be most affected if you lost your FA II (Pacinian) touch receptors?

Accepted Answer

Pacinian corpuscles (FA II receptors) are responsible for detecting high-frequency vibrations and rapid changes in pressure, such as when an object contacts another object or a mosquito lands on the skin.

Question 7

Mechanoreceptors that have a slow adaptation rate and small receptive field size are called

Accepted Answer

Merkel cell neurite complexes are mechanoreceptors that have a slow adaptation rate and small receptive field size, making them particularly sensitive to edges and points, thus providing detailed information about continuous pressure and texture.

Question 8

Mechanoreceptors that have a slow adaptation rate and large receptive field size are called

Accepted Answer

Ruffini endings are mechanoreceptors with a slow adaptation rate and large receptive fields, making them sensitive to skin stretch and sustained pressure.

Question 9

Mechanoreceptors that have a fast adaptation rate and small receptive field size are called

Accepted Answer

Meissner corpuscles are mechanoreceptors with a fast adaptation rate and small receptive field size, making them sensitive to light touch and changes in texture.

Question 10

Mechanoreceptors that have a fast adaptation rate and large receptive field size are called

Accepted Answer

Pacinian corpuscles are mechanoreceptors that are characterized by their fast adaptation rate and large receptive field size. They are especially sensitive to vibrations and pressure changes, making them distinct in this aspect compared to other types of mechanoreceptors listed.

Question 11

_______ fibers respond best to steady pressure, fine spatial details, and very low frequency vibrations of 5 Hz or less, and they terminate in Merkel cell neurite complexes.

Accepted Answer

SA I (Slowly Adapting type I) fibers are specialized for detecting steady pressure, fine spatial details, and very low frequency vibrations, which aligns with the description given. They are associated with Merkel cell neurite complexes, which are known for their role in fine touch and pressure sensation.

Question 12

_______ fibers respond best to sustained pressure and particularly to lateral skin stretch, and they terminate in Ruffini endings.

Accepted Answer

SA II (Slowly Adapting type II) fibers are known for their response to sustained pressure and especially to lateral skin stretch, terminating in Ruffini endings.

Question 13

_______ fibers respond best to low-frequency vibrations from about 5 to 50 Hz, such as are produced when an object slips from one's grasp, and they terminate in Meissner corpuscles.

Accepted Answer

FA I fibers are associated with Meissner's corpuscles and are particularly responsive to low-frequency vibrations, which is crucial for detecting slip and maintaining grip.

Question 14

_______ fibers respond best to high-frequency vibrations from about 50 to 700 Hz, which occur when an object first makes contact with the skin or when two objects contact each other, and they terminate in Pacinian corpuscles.

Accepted Answer

FA II fibers, also known as Pacinian corpuscles, are specialized for detecting high-frequency vibrations, typically ranging from 50 to 700 Hz. These vibrations are common when objects make initial contact with the skin or when two surfaces rub against each other.

Question 15

_______ are sensory receptors that signal information about changes in skin temperature.

Accepted Answer

Thermoreceptors are specialized sensory receptors responsible for detecting changes in temperature, allowing organisms to sense heat and cold.

Question 16

Which sensation would you become insensitive to if you lost your thermoTRP receptors?

Accepted Answer

ThermoTRP receptors are a group of transient receptor potential channels that are sensitive to changes in temperature. They are involved in detecting and responding to hot and cold temperatures, as well as the sensation of chemical heat (like that from chili peppers) and coolness (such as from mint). Therefore, losing these receptors would make you insensitive to all the listed sensations.

Question 17

Touch receptors can be found in the epidermis and

Accepted Answer

Touch receptors are primarily located in the skin, which is composed of two main layers: the epidermis (the outer layer) and the dermis (the inner layer). The dermis contains various types of touch receptors that respond to different stimuli such as pressure, vibration, and temperature.

Question 18

Refer to the figure.
 The figure demonstrates the locations of four types of

Accepted Answer

The answer of Refer to the figure.
 The figure demonstrates...

Question 19

Which of the following is not a type of mechanoreceptor?

Accepted Answer

Retinal ganglion cells are not mechanoreceptors; they are involved in the transmission of visual information from the retina to the brain. Mechanoreceptors, like Meissner corpuscles, Ruffini endings, Pacinian corpuscles, and Merkel cell neurite complexes, are specialized for sensing mechanical pressure or distortion.

Question 20

The _______ horn is the region at the rear of the spinal cord that receives inputs from receptors in the skin.

Accepted Answer

The dorsal horn of the spinal cord is the region that receives sensory information from the skin, including inputs about touch, pain, and temperature.

Quiz 13: Touch