Keeping The Body Alive Flashcards
The skin layers
Epidermis
Dermis
Hypodermis
Life processes
Mrs gren
7 Nutrition Excretion Movement Growth+development Respiration Stimuli response Reproduction Controlling their internal environment
Epidermis
Hair
Pore
Dermis
Hair erector muscle Oil gland Sweat gland Pain receptor Temperature receptor Pressure receptor Capillary loop
Hypodermis
Fat layer
Body temperature
37*C for the enzymes to work properly
How is body temperature kept constant
Sweat evaporates front he surface of your skin
You flush and lose heat by radiation through your skin
ADH and osmoregulation
Solute of concentration up/down
Detected in hypothalamus
Pituitary gland releases more ADH
ADH travels to kidney tubules
More/less water reabsorbed into blood
Small/large amount of of concentrated wine formed
Blood concentration of so lutes restored to normal
ADH production falls to normal/arises again
Kidneys
Excretes urea
Urine, sweating, breathing out, faeces remove too much water
Kidney functions
Balances the amount of water left in the blood
You take in mineral ions with your food these are lost in sweat
Removed in urine
Osmoregulation
The balance of water and mineral ions
Homeostasis
Keeping conditions inside the body constant
Changing them when the environment changes
How is homeostasis made possible
By excretion
Carbon dioxide produced
During respiration
Urea produced
When amino acids are broken down
Why must salt be balanced with
Must be balanced with water
So cells don’t have problems with Osmosis
What do kidneys control
Filter the blood
Control the amount of water/ions taken in
Core body temperature controlled by
The thermoregulatory centre in the brain
Diabetes
When the body doesn’t produce ip enough insulin to keep the glucose level constant
Problems of glucose…causing diabetes
Blood sugar may rise to fatally high levels when cells are starved of glucose for respiration
When can sugar be excreted
During urination
How can diabetes be treated
By injecting insulin before meal times
Glycogen and insulin
Keep glucose at a 4-6 mol/1 concentration for cell respiration
Pancreas (insulin, glycogen)
Pancreas monitors blood sugar level
1) Decrease in blood sugar level 2)rise in blood sugar level
1) Glycogen released 2)insulin released
1) Glycogen to glucose 2)glucose to glycogen
Anti doctrine hormone (ADH)
found/job
Pituitary gland
Controls water content of the blood
Insulin and glycogen
found/job
Pancreas
Lowers/ raises blood glucose levels
Adrenaline
found/job
Adrenal glands
Prepares the body for fight or flight
Oestrogen
found/job
Controls development if female secondary sexual characteristics
Progesterone
found/job
Ovaries
Controls development of female secondary sexual characteristics
Progesterone
Ovaries
Regulates the menstrual cycle
Testosterone
Testes
Male secondary sexual characteristics
involved in sperm production
Endocrine System
Second system that coordinates and controls your body
Endocrine glands
Make hormones that are released into the blood
And carried around the body to the targeted organs
