Lecture 6

Question 1

What is Q10 and what is its purpose?

Answer 1

It measures the increase in rate, as something is increased by 10 degrees Celsius

Question 2

How are animals able to maintain homeostasis?

Answer 2

There are thermos elective neurons within the body that detects temperature change. These neurons then will notify the brain releasing voluntary and involuntary actions to bring it back to the thermoneutral zone (TNZ)

Question 3

What happens to the body when it is below and above the TNZ frame?

Answer 3

Below temp, causes shivering

Above temp, this causes an increase in water expiration through sweat

Question 4

What keeps animals warm when its cold?

Answer 4

Insulation - different responses to cause muscular mobility

Heat protection - BAT

Regional heterothermy

Question 5

What does regional heterothermy look like?

Answer 5

countercurrent heat exchange where the arteries and veins in limbs become a lot closer so the heat from high oxygenated blood heats up low oxygenated blood that is entering back into the body

Question 6

What are some responses that homeotherms go through in response to hot weather?

Answer 6

• Behavioural (shade, burrows)
• Insulation (hide and hair/fur)
• Cycling body temperature
• Evaporative cooling (sweating, panting)

Question 7

What are the 3 factors that allow homeotherms to acclimate to the heat and cold?

Answer 7

1. Peak metabolic rate
2. Metabolic endurance
3. Insulation
4. Hibernation

Question 8

What is another name for hibernation and how does this work?

Answer 8

Controlled hypothermia, which essentially purposefully drops the body temperature below ambient temperature for long periods of time

Question 9

What’s the process like hibernation but for in the simmer?

Answer 9

Estivation

Question 10

What is it called when an animal allows its body temperature to approximate the ambient temperature?

Answer 10

Daily torpor