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ANSC 3270 Midterm 1 Exam Questions and Answers 2024 / 2025 (Verified Answers by Expert)
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ANSC 3270 Midterm 1 Exam Questions and Answers 2024 / 2025 (Verified Answers by Expert)
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ANSC 3270 Midterm 1.pdf file:///C:/Users/HP/Desktop/eewwww/ANSC%203270%20Midterm%ANSC 3270 Midterm Exam 1
1. What is a stressor?
ANS something that disrupts homeostasis in an organism andelicits a stress response
2. What is a stress response
ANS involves activation of multiple physiological systemsduring perceived danger
3. How does a stress response manifest
ANS as a fight, flight or freeze response
4. What is short-term stress response designed to do
ANS enhance survival of anorganisms by restoring physiological homeostasis
5. How is a stress sensory input relayed to the brain (3)
ANS through neural trans-mitters, endocrine hormones and immune cytokines
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6. How is variation in stress response determined by (3) and how are they reg-ulated
ANS determined by genetics, environmental factors, and gene-by-environment interactions.
Regulated by epigenetics mechanisms
7. What is a resilient animal to stress
ANS they are able to resist, cope, or completelyrecover from perceived danger
8. What happened if an animal is sensitized to a stressor
ANS can lead to hyper-re-sponsiveness to the same stressor or other stressors during
subsequent exposure
9. What are 3 examples of physical stressors
ANS Heat, cold, climate change
10. What is an example of a chemical stressor
ANS mycotoxins
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11. What is an example of a biological stressor (4)
ANS bacteria, fungi, virus, parasite
infectious stressor
12. What is an example of a physiological stressor
ANS weaning
13. What was found to be the most infectious time of the year for the haemonchus
contortus in european sheep? Why?
ANS Jul, Aug, Sept. The parasitecan grow in the growing grass, which the sheep eat, and get
infected from
14. What is Q0
ANS Potential infection pressure
15. How does CO2 relate to infection pressure
ANS believed that as CO2 increases,so does the infection pressure
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16. The time of day regulates what 2 viruses in mice
ANS Herpes and influenza
17. How does a viral infection worsen in the body
ANS when circadian rhythm isabolished by disruption of a key circadian clock gene
18. What is the key circadian clock gene
ANS BMAL 1
19. How does BMAL 1 change in humans during the year
ANS blood concentrationdecreases in the winter, and can be correlated to the increased risk of
infection during the winter
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