PSY 260 Introduction to Psychology Research and Ethics - PSY 260 EXAM 2
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Course
PSY 260
Institution
Grand Canyon University
PSY 260 EXAM 2 What is activated with sweet and bitter receptors?
- G-proteins 2nd messengers Ageusia - loss of taste perception
Phenylthiocarbamide - PTC causes people to taste nothing Supertasters
- 25% of people have more fungiform papillae on their taste buds
Supertasters are picky eaters...
psy 260 introduction to psychology research and ethics
introduction to psychology research and ethics
psy 260 introduction to psychology research and ethics exam 2
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Grand Canyon University
PSY 260
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PSY 260 EXAM 2
What is activated with sweet and bitter receptors?
- G-proteins
2nd messengers
Ageusia
- loss of taste perception
Phenylthiocarbamide
- PTC
causes people to taste nothing
Supertasters
- 25% of people have more fungiform papillae on their taste buds
Supertasters are picky eaters because food taste more bitter
Medium tasters
- 50% of people, less taste buds/receptors than supertasters
Nontasters
- 25% of people, have the least amount of taste receptors
What can make sour substances sweet?
- miracle berries
Gymnema sylvestre
- causes sweet substances to lose their taste
,Olfaction
- the sense of smell
Olfactory receptors
- sensory receptors for the nose, replaced every month
Pheromones
- chemicals released by an animal to affect the behavior of others of the same species
important for social behaviors
Vomeronasal organ
- sensitive to pheromones
(ex: women linking their periods)
Anosmia
- absence of the sense of smell
Specific anosmia
- the inability to smell one specific odor/chemical
Hyperosmia
- increased sensitivity to odors
Synesthesia
- describing one kind of sensation in terms of another ("a loud color", "a sweet sound")
result from too many branches within axons to other cortical regions
What happens if a sensory system is lost?
, - the brain adapts because it has a lot of plasticity
Types of muscles
- skeletal, smooth, cardiac
Neuromuscular junction
- junction between the neuron and the muscle
Proprioceptors
- sensory receptors in our muscles and joints
Muscle spindle
- senses when the muscles are stretching
ex: knee jerk reflex at the doctors
Golgi tendon organ
- senses when the muscles are contracting
they send inhibitory message if muscles contract too hard
Central pattern generators
- circuits that control coordinated movement
Myasthenia gravis
- immune system attacks cholinergic receptors in the muscle (aka neuron weakness)
Amyotrophic lateral sclerosis
- Lou Gehrig's disease, degeneration of motor neurons
- person loses voluntary movement
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