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Chapter 12 Senses
A/P 2 study
| Term | Definition |
|---|---|
| Proprioceptors | provide info about body position. Like the bodys GPS. ex: muscle spindles and Golgi tendon organs. |
| 5 type of receptors | Chemoreceptors, pain receptors, thermoreceptors, mechanoreceptors, and photoreceptors. |
| Chemoreceptors | detect chemical changes, associated with sense of smell and taste. In organs, detect changes in blood concentration of oxygen, glucose, other chemicals. |
| Pain Receptors (nociceptors) | respond to tissue damage. triggers include exposure to excess mechanical, electrical, thermal, or chemical energy. |
| Thermoreceptors | sense temp changes |
| mechanoreceptors | detect mechanical forces, such as touch or balance of vibrations in ear. |
| Photoreceptors | found in the eyes, respond to light, enabling vision. |
| Which type of receptor is responsible for detecting changes in blood pressure? | Baroreceptors |
| Baroreceptors | a mechanoreceptor. detects changes in blood pressure in certain blood vessels. |
| Which receptors are associated with the senses of smell and taste? | Chemoreceptors |
| What happens when a sensory receptor that is a neuron reaches its threshold? | an action potential is generated and propagated along the afferent fiber. |
| How does the brain perceive the sensation of pain from stepping on a tack? | the brain interprets the sensory impulses, realizing it as the perceptions of stepping on a tack. |
| What is the term for the brain's ability to ignore unimportant stimuli? | sensory adaptation |
| What do all receptors have in common? | each receptor is most responsive to a type of stimulus, and less responsive to other stimulis. |
| How is sensation different than perceptions? | sensation is the brain becoming aware of a stimulus, like feeling heat. Perception is interpreting that sensation, such as realizing your hand is on a hot stove. |
| What is sensory adaptation? | the ability of the nervous system to respond less to a continuous stimuli. |
| General Senses | skin, muscles, joints, and viscera. Divided into three senses groups: Exteroreceptive, Interoceptive, and Proprioceptive. |
| Exteroreceptive | associated with changes in body surface. sense of touch, pressure, temperature, and pain. |
| Interoceptive | Detecting changes in the viscera(blood pressure stretching blood vessels); visceroreceptive sense. |
| Proprioceptive | Sense that detects changes in muscle and tendons and body positions. |
| Which type of sense is associated with changes at the body surface? | Exteroreceptive senses. |
| What type of receptors are responsible for detecting deep pressure and vibrations? | lamellated corpuscle |
| free nerve endings | Simple receptors found in epithelial tissues. ex: itching |
| tactile (Meissner's) corpuscle | Sensory receptor close to the surface of the skin that is sensitive to light touch. abundant in hairless areas of skin. lips, fingertips, palms, soles, nipples. |
| lamellated (Pacinain) corpuscle | Sensory receptor deep in the dermis providing perception of pressure; detect deep vibrations of tissue. |
| Which receptors are involved in detecting changes in muscle tension? | golgi tendon organs |
| What type of sensation do free nerve endings primarily provide? | itching |
| The classification of sensory receptors as photoreceptors, thermoreceptors, etc is based on what characteristics of the receptor? | stimulus type that causes a response |
| what is the immediate response of stimulating a receptor? | The receptors membrane potential changes |
| Which of the following receptors does not trigger a sensation? | receptors that measure oxygen levels in the blood |
| The ability of the nervous system to become less responsive to a maintained stimulus is called sensory | adaptation |
| Where are sensory receptors for the general senses found? | throughout the body |
| Choose all true statements about the sensory receptors responsible for the general senses. | They are found throughout the skin. They are widespread in the body. They are associated with the viscera. |
| Choose two types of receptors that sense touch and pressure. | free nerve endings lamellated (Pacinian) corpuscles |
| for all receptors, stimulation of a receptor results in a change in | membrane potential |
| two types of thermoreceptors | warm, cold |
| The interpretation by the brain of incoming sensory impulses is called | perception |
Created by:
amy.still
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