Homeostatsis Flashcards
What is homeostasis
The regulation of the internal environment regardless of external environment is called homeostasis
What is hypothalamus
Its the body’s temperature monitoring centre
Hypothalamus is sensitive to what
Nerve impulses
(Hypothalamus) Information is communicated by e______ impulses through nerves to effectors, which being about responses to return t_______ to n_____
Electrical
Temperature
Normal
What is our ideals core temperature for a human is…?
37oC
What can happen if your body is too hot
Can cause heatstroke
What can happen if your body is too cold
Hypothermia
What do mammals and birds eat large quantities of to fuel their central heating systems
Energy rich food
The ability to maintain a constant temperature involves what?
Homeostasis
What’s the largest organ in the body
Skin
What are the responses to an increase in temperature include
Sweating
Skin blood vessels dilate ( blood diverted to the skin )
Hairs on skin relax
Reduce metabolic rate
Why dose sweating help you cool down
Message are sent to the sweat glands resulting in increased sweat production.
Heat energy form the body will convert the water into sweat to water vapour.
This lowers the body temperature
Vasodilation helps cool down because
Blood capillaries in the skin dilate, increasing blood flow to the skin this increases the heat lost by radiation
Why dose decreased metabolic rate help you cool down
Metabolic reactions generate heat decreasing the rate reduces heat production
What responses dose your body do to increase your body temperature
Shivering
Hairs stands up
Blood vessels constrict ( blood is diverted away from the skin)
Increase in metabolic rate
Shivering helps you heat up why
Rapid involuntary contractions of skeletal muscles generates heat
Why dose Vasoconstriction help you heat up
Blood capillaries in the skin constrict, decreasing blood flow to the skin this decreases heat loss by radiation
What is thermoregulation
This is the regulation of body temperature so that it stays at a set point of 37oC
If the body temperature falls too low then biological reaction may happen….
to slow for cells to survive
What cells are may be damaged if your body temperature rises too high
Enzymes and other cell proteins
Why dose Contraction of hair erector muscles help you heat up
Tis traps a layer of warm air at the skin that acts as extra insulation ( goosebumps )
Do you sweat more when it is warm
Yes
Dose the shunt vessel dilate when it’s warm or cold
Cold
What are voluntary responses when the environment is hot
Removing clothes
Taking a cold drink
Opening a window
What are voluntary responses when the environment is cold
Putting on extra clothes
Having a hot drink.
Turning up the heating
When dose hypothermia occur
When your body temperature falls below 35oC
If hypothermia is left untreated what can it eventually lead to
Heart failure
Respiratory system failure
death
When dose blood glucose rise
After eating
What is the name for too much glucose
Hyperglycaemia
Which type of diabetes is an autoimmune disease
A. Type 1
B. Type 2
A
I what Are the symptoms of diabetes for type one and type two
Increase urination
Throat
Obesity
Kidney damage
Blindness
Amputation ( diabetics foot )
What’s the name when you have not enough glucose
Hypoglycaemia
What are the symptoms of having not enough glucose
Sweating
Anxiety
tremor
confusion
Dizziness
Hunger
Coma
Blood sugar levels are controlled by h_____ that are secreted by the p_____
Hormones
Pancreas
What is the hormone called that is produced by the body to maintain normal blood glucose levels
Insulin
What dose your body do when in sense a rise in blood sugar
-Rise in blood sugar detected by pancreas
- pancreas produces insulin
- Insulin converts excess glucose to glycogen, which is stored in the liver
What happens when your body senses a drop in blood sugar
- Drop in blood sugar detected by pancreas
- pancreas produces glucagon
- glucagon converts glycogen stored in liver back to glucose
What is stored In The liver
Glycogen
What number of things are produced by the pancreas ( Bonus question name them )
Glucagon and insulin
Which organ detects changed in blood glucose concentration
Pancreas
Describe the level of blood glucose that woud cause:
A) glycogen to be converted to glucose
B) glucose being converted to glycogen
A) glucose levels fall
B) glucose levels rise
What is the hypothalamus sensitive to
Nerve impulses
