CIE A Level Biology復習筆記14.2.1 Stomata
Stomata Plants carry out?homeostasis?– just like animals they need to maintain a?constant internal environment For example, mesophyll cells in leaves require a?constant supply of carbon dioxide?for...
CIE A Level Biology復習筆記14.1.8 Test Strips & Biosensors
Test Strips & Biosensors Measuring urine glucose concentration People with?diabetes?cannot?control?their blood glucose concentration so that it remains within normal, safe limits The presence o...
CIE A Level Biology復習筆記14.1.7 The Control of Blood Glucose
The Control of Blood Glucose If the concentration of glucose in the blood?decreases?below a certain level, cells may not have enough glucose for?respiration?and may not be able to function normally...
CIE A Level Biology復習筆記14.1.6 Osmoregulation
Osmoregulation The control of the?water potential?of body fluids is known as?osmoregulation Osmoregulation is a key part of?homeostasis Specialised?sensory neurones, known as?osmoreceptors, monitor...
CIE A Level Biology復習筆記14.1.5 Formation of Urine
Formation of Urine in the Nephron The nephron is the?functional unit?of the kidney – the nephrons are responsible for the?formation of urine The process of urine formation in the kidneys occurs in?...
CIE A Level Biology復習筆記14.1.4 Nephron Structure
Nephron Structure Each kidney contains?thousands?of?tiny tubes, known as?nephrons The nephron is the?functional unit?of the kidney – the nephrons are responsible for the?formation of urine The loca...
CIE A Level Biology復習筆記14.1.3 Kidney Structure
Structure of the Human Kidney Humans have?two?kidneys The kidneys are responsible for carrying out two very important functions: As an?osmoregulatory organ?-?they regulate the water content of the ...
CIE A Level Biology復習筆記14.1.2 Production of Urea
Production of Urea Many?metabolic reactions?within the body produce?waste products The removal of these waste products is known as?excretion Many excretory products are formed in humans, with two i...
CIE A Level Biology復習筆記14.1.1 Homeostasis
Homeostasis In order to?function?properly and?efficiently, organisms have different?control systems?that ensure their?internal conditions?are kept relatively?constant The process of maintaining con...
