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PHSI3011 12-2 Comparative Physiology and Thermal #2

Gelöschter Nutzer 33 Fragen Aktualisiert am 10 Nov 2017

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1What is Tb?
(just imagine the "b" is subscript)
[blank_start]__________[blank_end]
1. ABody Temperature
2What is Ta?
(just imagine the "a" is subscript)
[blank_start]__________[blank_end]
1. AAmbient Temperature
3"Homeotherm" means:
1. A"one body temperature"
2. BHomeoerotically "hot"
3. CSelf-heating
4Tb varies with circadian rhythm by up to 1 degree. When is it lowest and highest?
(again, imagine the "b" is subscript)
1. A3-6am lowest; 3-6pm highest
2. B3-6am highest; 3-6pm lowest
3. C12-3am lowest; 12-3pm highest
4. D12-3am highest; 12-3pm lowest
5Tb varies with the menstrual cycle, usually increasing ~0.5-1°C during the:
(again, imagine the "b" is subscript)
1. APost-ovulatory phase
2. BPost-menstrual phase
3. CFollicular phase
4. DPost-follicular phase
6Babies are less able to maintain Tb. Why?
(just imagine the "b" is subscript)
(select all that apply)
1. ADon’t readily shiver or sweat
2. BHigh surface-mass ratio
3. CThey’re dumb
7During a fever (or exercise), the normal Tb is:
(just imagine the "b" is subscript)
1. A34-36°C
2. B36-38°C
3. C38-40°C
4. D40-42°C
8True or false: Old people also have less effective regulation, due in part to their reduced ability to dissipate heat. One reason for this is sweat gland atrophy.
1. ARichtig
2. BFalsch
9True or false: Old people also have less effective regulation, due in part to their reduced ability to generate heat. One reason for this is sweat gland atrophy.
1. ARichtig
2. BFalsch
10E = G + T*S
E = [blank_start]___[blank_end]
G = [blank_start]___[blank_end]
T = [blank_start]___[blank_end]
S = [blank_start]___[blank_end]
1. ATotal internal energy
2. BEnergy emitted from a system
3. Cdisposable ("Good") energy
4. Denergy Gained by a system
5. Eabsolute Temperature
6. FThermodynamic energy within a system
7. GTemperature increase
8. Hentropy
9. Itotal energy within a System

11True or false: an Endotherm is an organism that can generate its own heat.
1. ARichtig
2. BFalsch
12True or false: Metabolism is defined as all the chemical processes involved in energy production, energy release, and growth.
1. ARichtig
2. BFalsch
13Anabolic vs Catabolic:
1. AAnabolic = FORMATION of substances
2. BAnabolic = BREAKDOWN of substances
3. CCatabolic = FORMATION of substances
4. DCatabolic = BREAKDOWN of substances
14Metabolic Rate (MR) = the rate at which energy is consumed during:
(select all that apply)
1. Ainternal work
2. Bexternal work
3. Cenergy expenditure / unit of time
4. Denergy expenditure (independent of a unit of time)
15BMR vs RMR
The difference between BASAL metabolic rate and RESTING metabolic rate is:
1. ABoth are idling, but Basal is during minimal part of the day
2. BBoth are idling, but Resting is during minimal part of the day
16Metabolic Rate (MR) depends on:
(select all that apply)
1. AMuscle activity (voluntary)
2. BMuscle activity (involuntary)
3. CCertain hormones
4. DA rise in tissue temperature itself
17Hormones that can influence Metabolic Rate (MR) include Thyroxine and Adrenaline. What effect can they have?
1. AAdrenaline increases MR; Thyroxine decreases MR.
2. BAdrenaline decreases MR; Thyroxine increases MR.
3. CBoth DECREASE MR.
4. DBoth INCREASE MR.
18Under resting conditions, the rate of heat production is:
1. A~80 kcal/h
2. B~400-600 kcal/h
3. C~80-120 kcal/h
4. D~120-160 kcal/h
5. E~800 kcal/h
19During a fast walk or jog, Metabolic Rate (MR) is increased to 400-600 kcal/h. In the absence of compensatory heat loss (sweating etc), this extra thermal load would increase Body Temperature by how much?
1. A1°C every 8-10 minutes
2. B1°C every minute
3. C1°C every hour
4. D1°C every 10-20 minutes
5. E1°C every 1-2 hours
20The most common method to measure metabolic rate is:
1. AIndirect calorimetry
2. BGuesswork?
21Animals including the stripe-faced dunnart (Sminthopsis macroura) are heterothermic. Heterotherms are:
1. AAble to maintain homeothermic thermoregulation, but sometimes can enter torpor.
2. BAnimals which maintain thermoregulation collectively.
22Torpor vs Hibernation.
What's the difference?
1. ATorpor lasts less than a day; Hibernation lasts longer than a day.
2. BTorpor lasts less than a day; Hibernation is a multiday series of torpor bouts.
23Torpor and hibernation use are found in which groups:
(select all that apply)
1. AArtiodactyls (even toed ungulates - e.g. sheep, cattle, pigs, camels, goats)
2. BCertiodactyls (marine mammals - e.g. whales, dolphins, porpoises)
3. CPerissodactyls (odd-toed ungulates - e.g. horses, rhinoceroses)
4. DMonotremes (e.g. echidnas)
5. EMarsupials (e.g. pygmy possums)
6. FPrimates (e.g. Antivaxxers)
7. GInsectivores (Eulipotypla: European shrews and hedgehogs; Afrotheria: tenrecs and elephant shrews)
8. HCarnivores (badgers and bears)
9. IRodents (e.g. ground squirrels and hamsters)
10. JBats
24Are there Aussie birds which hibernate?
1. AYeah
2. BNah
25"Super-hibernator":
This is fucking awesome - the arctic ground squirrel hibernates at body temperatures of ~0°C! around the lips is at (or slightly above) zero, while some other parts (including colon) get BELOW 0°C.
Yeah, this is true. So cool, though (geddit?? ...sigh).
1. ARichtig
2. BFalsch
26Current view of the efferent mechanisms of thermoregulation.
Label the three appropriate areas.
1. AHypothalamic preoptic area
2. BDorsomedial hypothalamus
3. CRaphe nuclei in medulla oblongata
4. DHypothalamic preoptic area
5. EDorsomedial hypothalamus
6. FRaphe nuclei in medulla oblongata
7. GHypothalamic preoptic area
8. HDorsomedial hypothalamus
9. IRaphe nuclei in medulla oblongata
27True or false: Brown Fat / Brown Adipose Tissue (“BAT”) can induce non-shivering thermogenesis in the absence of muscle stimulus.
1. ARichtig
2. BFalsch
28During cold exposure, [blank_start]__________[blank_end] [blank_start]__________[blank_end] release activates BAT by stimulation of lipolysis and “futile” UCP1-dependent mitochondrial respiration.
1. ASympathetic
2. BParasympathetic
3. CNorepinephrine (/noradrenaline)
4. DEpinephrine (/adrenaline)
29True or false: UCP1 is found in significant levels in the cortex of non-torpor mammals.
1. ARichtig
2. BFalsch
30UCP1 is:
[blank_start]_____[blank_end] [blank_start]_____[blank_end] [blank_start]_____[blank_end] 1
1. AUn-
2. BUniversal
3. CProgenitor
4. DProtein
5. ECoupling
6. FCold-sensitive
7. GClimate-sensitive
31Which of the 4 ways of heat loss is the most physiologically significant (under normal conditions)?
1. ARadiation
2. BConduction
3. CConvection
4. DEvaporation
32Hot flushes usually last how long?
1. A1-5 min
2. B5-10 min
3. C10-15 min
4. D15-30 min
5. E30-60 min
33Hot flushes are believed to occur because of:
1. AOestrogen withdrawal
2. BProgesterone withdrawal
3. CChanges in the uterine epithelium

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Beschreibung: PHSI3011 12-2 Comparative Physiology and Thermal Physiology #2
Autor: Gelöschter Nutzer
Sprache: English
Aufrufe: 25
Verlauf: Erstellt am 29 Okt 2017 · aktualisiert am 10 Nov 2017
Schlagwörter: phsi3011 physiology w12 day comparative thermal 2017 der nutzer hat seine fachbereichs-information gelöscht.
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PHSI3011 12-2 Comparative Physiology and Thermal #2

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