sensitive to four tactile sensations:
– Pressure (touch), pain, warmth, cold – Conveyed by receptors in the skin and in our internal organs
The Skin and Body Senses: skin Senses:
• Multilayered elastic structure • Contains a variety of receptor structures
– Free Nerve Endings: primary receptors...
and relay the information in the nerve impulses to the cardiac centres. Activity in the vagus nerve slows the heart rate down and decreases blood pressure back to normal. Receptors are sensitive to temperature change and are known as thermoreceptors and these are present in the skin and deep inside...
basic tastes are sweet, sour, bitter, and salty. The
receptor for smell is the nose, and the lock-and-key theory is
the most successful attempt to explain how gases activate our
sense of smell. The receptor for taste is the taste buds in the
mouth. Specific patterns of taste-bud activity...
Mechanoreceptors respond to a change in pressure (i.e. touch, pressure, vibrations, stretch)
Thermoreceptors are sensitive to temperature change
Photoreceptors (in retina of eye) respond to light energy
Chemoreceptors respond to changes in chemical concentrations...
* Detection of light, perceived as light.
* Detection of pressure, vibration, and movement perceived as touch, hearing and equilibrium.
* Detection of chemical detected as smell and taste.
D. The receptors in the...
. Thermoreceptors sense changes in temperature. Mechanoreceptors sense mechanical deformation of tissue. Proprioceptors sense changes in position of joints. Stretch receptors sense changes in tissue length. Photoreceptors sense changes in light intensity. Somatic Sensory System We can divide the sensory...
decreases BP back to normal.
Receptors sensitive to temperature change are known as thermoreceptors and are present in the skin and deep inside the body, they relay information through nerve impulses to a part of the brain called the hypothalamus which activates appropriate feedback systems...
respond to two or more types.
Exteroceptors are close to the body surface and are specialized to detect sensory information from the external environment (such as visual, olfactory, gustatory, auditory, and tactile stimuli). Receptors in this class are sensitive to touch (light stimulation...
A) nociceptors; thermoreceptors
B) baroreceptors; chemoreceptors
C) baroreceptors; nociceptors
D) chemoreceptors; nociceptors
E) baroreceptors; thermoreceptors
6) A receptor potential may
A) increase neurotransmitter release.
B) decrease neurotransmitter release.
Gehrig’s disease? Loss of the ability to speak, swallow and breathe
178. What are the 5 receptor stimulus types? Mechanorecptors, thermoreceptors, photoreceptors, chemoreceptors, nociceoptors
179. Any receptor that is over stimulated will cause pain.
180. Mechanoreceptors respond to touch...
exercise regularly are usually healthier than people who take little exercise.
The effect of exercise on breathing and heart rate is not required.
GCSE Biology for teaching from September 2011 onwards (version 1.1)
B1.1.2 Howour bodies defend themselves against infectious diseases...
(control of body temperature)
* To relay nerve impulses generated from the specialised skin sensory receptors for heat, cold, touch, pain and pressure, thus informing the brain of changes in the environment.
* To synthesis vitamin D from sunlight acting on the adipose layers.
The dermis is a...
world and their mental worlds.
That is, we see, we hear, we taste, we smell, and we touch the world around us in order to sense it.
Our Sensory receptors are our human organs:
* the eyes
* and skin
that receive inputs from the environment.
All five of our...
example of a tactile sense.
Humans are sensitive to at lest four tactile senses: pressure (touch), pain, warmth, and cold. These sensations are conveyed by receptors in the skin and in our internal organs.
Mixtures of these 4 senses form the basis of all other common skin sensations. Example...
constant, unchanging stimuli (cognitive)
Sensory adaptation – sensry receptors less response to constant stimuli (biological)
Signal Transduction Theory (David Green & John Swets):
Helps psychologists determine how we detect stimuli under certain conditions
Signal-to-noise ratio: It becomes...
amount of sweating. This will decrease body temperature because when the sweat evaporates it is effectively removing heat from our bodies. Once the thermoreceptors detect that body temperature has returned to the mean it will stop sending electrical impulses to the heat loss centre in the hypothalamus...
PNS Study Guide
PNS 1 Notes:
From Sensation to perception
• 3 levels of integration of sensation- receptor, circuit, perceptual
o What happens with the processing at each level
o Stimulus-mechanoreceptor, thermoreceptor...
: sweet, sour, salty, umami, and bitter tastes.
Whenever people touch something hot, they feel a burning sensation. Because of this, they automatically remove their hand away from the heat. This is caused by pain receptors and thermoreceptors. The brain sends numerous sensory receptors with...
sensory adaptation | the process by which our sensitivity diminishes when an object constantly stimulates our senses. |
signal detection theory | the viewpoint that both stimulus intensity and decision-making processes are involved in the detection of a stimulus...
potential and releasing neurotransmitters that send a signal to neighboring cells. (However, some sensory receptors do have axons and dendrites)
Adaptation: the process through which responsiveness to an unchanging stimulus decrease over time. This is why touch sensations you get from glasses or...