Excretion Flashcards
What is vasoconstriction?
Blood vessels in the skin get smaller
What are ectotherms?
Gain or lose heat from or to their external environment
What are endotherms?
Generate their own heat from metabolic reactions
What is vasodilation?
Blood vessel expand
What is the function of the skin?
Protection Vit production Food store Sense organ Excretion Temp reg
What layer is melanin found in?
Malpighian
What is the function of the dermis?
Protect internal organs from bumps and bangs
What is sebum for?
Prevent hair and skin drying out
What is the function of the epidermis?
Barrier to prevent water loss and entry of pathogens
What is the function of melanin?
Protect skin from UV radiation
What is piloerection?
Hairs stand up on skin
What is filtration?
Movement of small molecules and water from the blood plasma into the nephron
What is reabsorption?
Movement of small molecules from the nephron into the blood
What Is the function of the cortex?
Filtration
What is the function if the medulla?
Reabsorption
How is the glomerulus adapted to do its job?
1) Blood pressure is higher than average bp
2) Surface are is large- more area for filtration
3) Capillaries are move porous than normal capillaries
What is the function of the proximal convoluted tubule?
Absorb the most water and small molecules
How is the proximal convoluted tubule adapted to do its job?
1) Long
2) Thin
3) High concentration of mitochondria- ATP for active transport
What is the function of the distal convoluted tubule?
Control salt and pH value of blood
What is the function of the descending loop of Henle?
Reabsorb water
What is the function of the ascending loop of Henle?
1) reabsorb salt via diffusion
2) reabsorb salt via active transport (higher up)
3) reabsorb water
What is homeostasis?
The ability of an organism to maintain a constant internal environment
What is the function of the kidneys?
1) Excretion
2) Osmoregulation
3) pH control
What is filtration?
Movement of small molecules and water from the blood plasma into the nephron
What is reabsorption?
Movement of small molecules from the nephron into the blood
What Is the function of the cortex?
Filtration
What is the function if the medulla?
Reabsorption
How is the glomerulus adapted to do its job?
1) Blood pressure is higher than average bp
2) Surface are is large- more area for filtration
3) Capillaries are move porous than normal capillaries
What is the function of the proximal convoluted tubule?
Absorb the most water and small molecules
How is the proximal convoluted tubule adapted to do its job?
1) Long
2) Thin
3) High concentration of mitochondria- ATP for active transport
What is the function of the distal convoluted tubule?
Control salt and pH value of blood
What is the function of the descending loop of Henle?
Reabsorb water
What is the function of the ascending loop of Henle?
1) reabsorb salt via diffusion
2) reabsorb salt via active transport (higher up)
3) reabsorb water
What is homeostasis?
The ability of an organism to maintain a constant internal environment
What is the function of the kidneys?
1) Excretion
2) Osmoregulation
3) pH control
