General Homeostasis
Provide a definition for Homeostasis
The body's ability to maintain a stable, balanced internal environment
What is gluco-regulation also known as?
Blood sugar
What is the set point of the internal temperature of a human?
37.0 C
Are dogs Endotherms or Ectotherms
Endotherms
How many Chromosomes does a human have
46 (or 23 pairs)
What part of the brain is often the Control Centre in a Homeostatic process?
Hypothalamus
What two main organs are involved in gluco-regulation?
Pancreas and Liver
Vasodilation, Sweating
True or false? Ectotherms are warm blooded?
False!
What is the function of red blood cells?
This mechanism is a self-regulating system which aims to counteract changes in order to return back to its original state.
Negative feedback loop.
Where in the body is the liver found?
Upper right-hand portion of the abdominal cavity.
or, just under right ribcage.
Where are thermo-receptors found in the body?
the skin and/hypothalamus
Compared to ectotherms, endotherms require a greater intake of this resource to sustain thermoregulation.
food/energy
Name 3 characteristics of a mammal
Hair/fur, milk production, live birth, warm blooded, has lungs.
State 5 internal variables which are controlled by Homeostatic mechanisms.
Blood sugar, Blood pressure, Temperature, Osmotic balance, Immune system
The Pancreas releases this when blood sugar increases above setpoint.
Insulin
In cold conditions, endotherms increase heat production through this involuntary muscular activity.
This behavioural strategy allows ectotherms to increase body temperature without increasing metabolic rate.
basking (in the sun)
What is the worlds tallest grass?
Bamboo
These specialised cells in the hypothalamus detect changes in blood water potential and trigger hormone release from the posterior pituitary.
Osmoreceptors
What is the set point for a humans glucose level?
Hint: measured in mg per mL (xxmg/xxxmL)
90mg/100mL
How do mesotherms maintain their heat?
metabolism, insulation, behaviour.
The "cost" of being an endotherm is high, meaning less energy from food goes toward this, compared to ectotherms.
Growth.
What is the top speed of a cheetah? (guess must be within 10 km/h of the answer to be correct).
120 km/h.