Jamestown survives notes
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Jamestown survived thanks to tobacco introduced by John Rolfe, which grew well in Virginia's climate and soil. Rolfe marrying Pocahontas united the colonists and Native Americans, who began cooperating by offering help, sharing knowledge, and trading food. This cooperation and the profitable tobacco crop allowed Jamestown to thrive.
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Qualifications:
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Primary taste sensations: Sweet, Sour, Salty, Bitter, Umami
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Features: Taste pores, Taste hairs/microvilli, and Taste nerve fibers
Location of Taste Buds:
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Mechanism of Taste Stimulation:
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Taste Sensitivity and Adaptation:
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Taste Preferences and Aversions:
Mechanisms behind taste preference and aversion
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Impact of Sensory Nerve Damage:
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Abnormalities of Taste Detection:
Conditions: Ageusia, Hypogeusia, Dysgeusia (parageusia)
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MPH (GC University, Faisalabad)
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Describe the relationship between the taste threshold and taste index of common substances.
Explain the chemical basis and signal transduction of taste perception for each type of primary taste sensation.
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Significance of Taste Sensation:
Differentiation between pleasant and harmful food
Influence on behavior
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Receptors of Taste:
Taste buds on the tongue
Influence of sense of smell, texture of food, and pain stimulation (e.g., by pepper)
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Primary taste sensations: Sweet, Sour, Salty, Bitter, Umami
Chemical basis and signal transduction mechanisms for each taste
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Taste threshold values for Sweet (sucrose), Salty (NaCl), Sour (HCl), and Bitter (Quinine)
Taste index relationship: Inversely proportional to taste threshold
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Composition: Epithelial cells, Sustentacular/Supporting cells, Taste cells, Basal cells
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Signal transduction pathways for Umami, Sweet, Bitter, Sour, and Salty tastes
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Dissolution of tastants to reach receptors
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Taste Preferences and Aversions:
Mechanisms behind taste preference and aversion
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Degeneration of taste buds if the sensory nerve fiber is cut
Abnormalities of Taste Detection:
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Neurotransmitters and Taste Threshold:
Effects of serotonin (5-HT) and norepinephrine (NE) on taste sensitivity
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Jamestown survives notes
- 2. Tobacco
- 3. John rolfe introduces tobacco to the colony
- 4. Grows easily in virginia
- 5. Climate is good for tobacco
- 6. Soil is good for tobacco
- 7. England is willing to buy it
- 8. Cooperation with the native Americans
- 9. john smith sets up trade
- 10. john rolfe marries pocahontas and unites the two groups
- 11. they begin to offer help and share knowledge
- 12. they begin to trade food