AQA A Level Biology復(fù)習(xí)筆記6.4.7 Diabetes
The Causes of Diabetes There are over 3 million people suffering from diabetes in the UK Diabetes is a condition in which the homeostatic control of blood glucose has failed or deteriorated ...
AQA A Level Biology復(fù)習(xí)筆記6.4.6 Control of Blood Glucose Concentration
The Role of the Liver in the Conversion Between Glycogen & Glucose The liver plays a vital role in the conversion between glycogen and glucose The conversion between these molecules help...
AQA A Level Biology復(fù)習(xí)筆記6.4.5 Adrenaline
The Role of Adrenaline A hormone called?adrenaline?can affect blood glucose concentration When it is secreted it?increases the concentration of blood glucose It does this by binding to?diffe...
AQA A Level Biology復(fù)習(xí)筆記6.4.4 Glucagon
The Action of Glucagon 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 normall...
AQA A Level Biology復(fù)習(xí)筆記6.4.3 Insulin
The Action of Insulin 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...
AQA A Level Biology復(fù)習(xí)筆記6.4.2 Negative Feedback
Negative Feedback The majority of homeostatic control mechanisms in organisms use?negative feedback?to maintain?homeostatic balance?(ie. to keep certain physiological factors, such as blood ...
AQA A Level Biology復(fù)習(xí)筆記6.3.6 Investigating Muscle Fatigue
Investigating Muscle Fatigue Prolonged or sustained exercise requires the?repeated contraction?of muscles Over time this can cause muscles to?fatigue?so they are no longer able to contract a...
AQA A Level Biology復(fù)習(xí)筆記6.3.5 Slow & Fast Skeletal Muscles
Slow & Fast Skeletal Muscle Fibres There are two types of muscle fibres found in muscles Fast?fibres Slow?fibres Human muscles are made up of both types of muscle fibres Some musc...
AQA A Level Biology復(fù)習(xí)筆記6.3.4 Muscular Contraction
The Sliding Filament Model Structure of thick & thin filaments in a myofibril The?thick filaments?within a myofibril are made up of?myosin molecules These are?fibrous protein molecules?w...
