Question 1

In this experiment, which part of the body showed the smallest 2-point threshold?&#10;A)Palm of the hand&#10;B)The forearm&#10;C)Fingertip&#10;D)The leg&#10;E)The back of the neck

Accepted Answer

The 2-point threshold is the smallest at the fingertips due to the high concentration of receptors in that area. So, the correct answer is option C - Fingertip.

Question 2

Areas of the body that are capable of precise tactile localization contain more abundant touch receptors than areas that are not.

Accepted Answer

This statement is true. The ability to precisely localize tactile stimuli is dependent on the density of touch receptors in the skin. Areas such as the fingers, lips, and tongue have a higher density of touch receptors, allowing for fine discrimination of touch compared to areas such as the back or legs which have a lower density of receptors.

Question 3

For tactile localization, the brain interprets information from touch receptor fields in the&#10;A)primary motor cortex.&#10;B)brainstem.&#10;C)primary somatosensory cortex.&#10;D)diencephalon.&#10;E)cerebellum.

Accepted Answer

Tactile localization involves the sense of touch, which is processed by the somatosensory system. The primary somatosensory cortex, located in the parietal lobe, is responsible for processing information from touch receptor fields on the skin, making it the best choice for this question.

Question 4

Which of the following is NOT true of sensory adaptation?&#10;A)Thermoreceptors commonly undergo sensory adaptation.&#10;B)It involves a fading of sensation upon continuous receptor stimulation.&#10;C)It occurs when a person adjusts to a strong smell in the environment.&#10;D)It commonly occurs in pain receptors.&#10;E)All of these are true of sensory adaptation.

Accepted Answer

Sensory adaptation commonly occurs in most types of receptors, but not in pain receptors. Pain receptors continue to fire and signal discomfort or pain, even with prolonged exposure to the same stimulus.

Question 5

General senses are senses that have sensory receptors distributed widely in the skin, joints, muscles, and organs.

Accepted Answer

General senses include touch, pressure, vibration, temperature, and pain, and their receptors are distributed widely throughout the body. They are not localized to specific organs or structures like special senses such as taste, smell, vision, hearing, and equilibrium.

Question 6

The form in which receptors send sensory information to the brain is called perception.

Accepted Answer

Perception refers to the cognitive interpretation of sensory information by the brain, whereas receptors send raw sensory information to the brain in the form of nerve impulses.

Question 7

Tactile and lamellated corpuscles are types of&#10;A)photoreceptors.&#10;B)thermoreceptors.&#10;C)chemoreceptors.&#10;D)nociceptors.&#10;E)mechanoreceptors.

Accepted Answer

Both tactile and lamellated corpuscles are types of mechanoreceptors, which respond to mechanical forces such as pressure and vibration. They are located in the skin and help us to sense touch, texture, and pressure. Photoreceptors are responsible for detecting light, thermoreceptors respond to temperature changes, chemoreceptors detect chemicals, and nociceptors detect pain.

Question 8

All sensory neurons have receptive fields of approximately the same size.

Accepted Answer

Sensory neurons have varying sizes of receptive fields depending on the type of sensory information they receive and the location in the body. For example, sensory neurons in the fingers have smaller receptive fields than those in the back.

Question 9

Which of the following is NOT a stimulus for various mechanoreceptors?&#10;A)Stretch&#10;B)Cold temperature&#10;C)Deep pressure&#10;D)Vibration&#10;E)Light touch

Accepted Answer

Mechanoreceptors respond to mechanical stimuli such as stretch, pressure, vibration, and touch. However, they do not respond to temperature, so the correct answer is B.

Question 10

A special sense is one that has&#10;A)no receptors.&#10;B)receptors that are confined to the head.&#10;C)receptors that respond to several types of stimuli.&#10;D)receptors only found in humans.&#10;E)unencapsulated receptors.

Accepted Answer

Special senses are senses that have specialized receptors and are confined to specific parts of the body, in this case, the head. Examples of special senses include vision, hearing, taste, and smell. Therefore, choice B is the best answer since it correctly identifies that special senses have receptors that are limited to the head.

Question 11

Which of the following receptors do not consist of free nerve endings?&#10;A)Warm receptors&#10;B)Meissner's corpuscles&#10;C)Cold receptors&#10;D)Nociceptors&#10;E)All of these receptors consist of free nerve endings.

Accepted Answer

The answer of Which of the following receptors do not...

Question 12

Which type of sensory receptors respond to tissue damage, such as a cut, or a temperature or pressure extreme?&#10;A)Mechanoreceptors&#10;B)Thermoreceptors&#10;C)Chemoreceptors&#10;D)Tactile corpuscles&#10;E)Nociceptors

Accepted Answer

The answer of Which type of sensory receptors respond to...

Question 13

The results of the temperature experiment suggest that there is a greater concentration of cold receptors than warm receptors in the skin.

Accepted Answer

The answer of The results of the temperature experiment suggest...

Question 14

An environmental temperature of 85&#176;F would stimulate a ________, and a temperature of 180&#176;F would stimulate a ________.&#10;A)nociceptor; nociceptor&#10;B)warm receptor; warm receptor&#10;C)thermoreceptor; mechanoreceptor&#10;D)warm receptor; nociceptor&#10;E)mechanoreceptor; thermoreceptor

Accepted Answer

The answer of An environmental temperature of 85&#176;F would stimulate...

Question 15

Which of the following is NOT true of Meissner's corpuscles?&#10;A)They are also called tactile corpuscles.&#10;B)They are numerous in the hands, feet, joints, and external genital organs.&#10;C)They are most abundant in the hypodermis.&#10;D)They are stimulated by light touch.&#10;E)All of these are true of Meissner's corpuscles.

Accepted Answer

The answer of Which of the following is NOT true...

Deck 34: General Senses