Tay Yu Liang - 71789
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Fact(s)
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Idea(s)
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Learning Issue (s)
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Action Plan(s)
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1.
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A
23-year old man developed an irregular heart rhythm, complained lethargy,
tremor of hands and arms. He complained about anxiety, sweating and hunger.
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Hypoglycaemia
and its Causes
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1.
What are these symptoms
indicating to?
2.
What are the possible
causes?
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1.
Hypoglycaemia is deficiency of glucose in the bloodstream.
There are two types of hypoglycaemia that are reactive hypoglycaemia and
non-reactive hypoglycaemia.
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Reactive hypoglycaemia occurs within a few hours after a
meal. An overproduction of insulin causes reactive hypoglycaemia. indicator
for the diseases.
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Non-reactive hypoglycaemia isn't necessarily related to
meals and may be due to disease. In some cases, a tumour of the pancreas can
cause the body to make too much insulin or an insulin-like substance,
resulting in hypoglycaemia. Hormone deficiencies can also cause hypoglycaemia
because hormones control glucose levels.
2.
Taking too much insulin or diabetes medication.When there is too much insulin in the blood, the
cells absorb more sugar than they need to, leaving less sugar
in the blood.
Hypoglycaemia, or low blood sugar, can occur as a result. When the blood
sugar levels are too low, the body cannot function properly.
Drinking alcohol.
3.
- Alcohol consumption causes an increase in insulin
secretion, which leads to low blood sugar. This results in a much higher risk
of the most dangerous kind of hypos in which blood sugar is very low and
there are significantly higher risks of cardiac arrhythmia, brain damage
(and) myocardial infarction.
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2.
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Biochemical
investigation
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The
Process of Metabolism, Glycolysis, Krebs Cycle and Electron Transport System
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1.
What test is used
to detect blood sugar level?
2.
What are the metabolism
process and how did it occur?
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1.
A1C Test can
be used to
diagnose type 2 diabetes and
prediabetes.
The A1C test is also the primary test used for diabetes
management sometimes called the haemoglobin A1C, HbA1c, glycated
haemoglobin, or glycohaemoglobin test.
2.
Metabolism is a term that is used to describe all chemical
reactions involved in maintaining the living state of the cells and the
organism. Metabolism can be conveniently divided into two categories:
Catabolism - the
breakdown of molecules to obtain energy Anabolism - the synthesis of all
compounds needed by the cells. The metabolism involved is the aerobic
metabolism respiration occur in cells in the presence of oxygen. There are
four main stages in aerobic respiration which are glycolysis, the link reaction,
krebs cycle and electron transport chain.
Glycolysis
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The process occurs in the cytosol of the cytoplasm of the
cells.
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The glucose molecule is phosphorylated from the hydrolysis
of ATP to become glucose-6-phosphate by ezyme hexokinase.
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Glucodr-6-phoshate is rearranged by phosphoglucoisomerase to become the
isomer fructose- 6-phoshate.
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The
fructose-6-phosphate is activated by the addition of another phosphate group
from the hydrolysis of ATP by phosphofructokinase.
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The fructose-1,6-bisphosphate produced is split by enzyme
aldolase (lysis) into glyceraldehyde-3-phosphate and its isomer
dihydroxyacetone phosphate.
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Dihydroxyacetone phosphate rearranges onto another molecule of
glyceraldehyde-3-phosphate. glyceraldehyde-3-phosphate is oxidised, hydrogen
atoms are removed, NAD+ is reduced to become NADH, an inorganic (Pi) is
attached to the subtracted making the product of\glycerate-1,3-biphosphate.
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One phosphate from each glycerate -1,3-bisphosphate is
transferred to ADP to form ATP by phosphoglycerokinase.
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The glycerate-3-phoshate is rearranged to form
glycerate-2-phophate catalysed by phosphoglyceromutase.
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Removal of water by enolase produces phosphoenolpyruvate.
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Phosphoenolpyruvate is converted as phosphate is
transferred ADP to form ATP by pyruvate kinase to pyruvate.
Link Reaction/ Trasition
Stage
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occurs in the mitochondrial matrix, and converts pyruvate
into the two-carbon molecule acetyl CoA by removing carbon dioxide and
hydrogen, through the process of decarboxylation.
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Carbon
dioxide and hydrogen are removed from two
pyruvate molecules, producing two acetyl
groups. The hydrogen removed is transferred to NAD, reducing it.
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Coenzyme A (CoA) combines with the acetyl group to form
acetyl CoA.
Krebs Cycle
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acetyl CoA combines with oxaloacetate in the condensation
reaction to form citrate. A coenzyme (CoA) is released. Reaction is catalysed
by citrate synthetase.
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citrate rearranges by the removal of water molecules and
the addition of water to a different carbon atom to form its isomer
isocitrate, reaction is catalysed by aconitase,
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isocitrate is oxidised to form oxalosuccinate. NAD+ is
reduced to become NADH catalysed by isocitrate dehydrogenase.
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Oxalosuccinate which is still bound to enzyme isocitraye
dehydrogenase is unstable. It immediately undergoes
decarboxylation, loses CO2 and is converted to α-ketoglutarate.
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α-ketoglutarate
is decarboxylated and CO2 is removed. the NAD+ is
reduced to NADH catalysed by succinyl CoA
synthetase.
Subtrate level
phosphorylation takes place. Succinyl
CoA is converted to succinate. The energy release is used for phosphorylation
of GDP forming GTP. GTP transfer its phosphate group to ADP forming ATP.
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Succinate is oxidase to fumarate, two hydrogen atoms are transferred to
FAD to form FADH2 catalysed by succinate
dehydrogenase.
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Fumarate become hydrated by the addition of water is
converted to malate by fumarase.
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Malate is oxidised to regenerated oxaloxacetate and NAD+ is
reduced to NADH catalysed by malate dehydrogenase. Oxaloacetate can be used
to combined with acetyl CoA and the cycle is
repeated.
Electron Transport Chain
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The final stage of aerobic respiration is the electron
transport chain, which is located on the inner mitochondrial membrane.
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The hydrogen carriers (NADH and FADH2) are oxidised and release
high energy electrons and protons
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The electrons are transferred to the electron transport
chain, which consists of several transmembrane carrier proteins.
As electrons pass through the chain, they lose energy
– which is used by the chain to pump protons (H+ ions) from the matrix
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The accumulation of H+ ions within the intermembrane space
creates an electrochemical gradient (or a proton motive force)
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The proton motive force will cause H+ ions to move down
their electrochemical gradient and diffuse back into matrix
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This diffusion of protons is called chemiosmosis and is
facilitated by the transmembrane enzyme ATP
synthase
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As the H+ ions move through ATP synthase they trigger the
molecular rotation of the enzyme, synthesising ATP
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In order for the electron transport chain to continue
functioning, the de-energised electrons must be removed
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Oxygen acts as the final electron acceptor, removing the
de-energised electrons to prevent the chain from
becoming blocked
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Oxygen also binds with free protons in the matrix to form water – removing matrix protons
maintains the hydrogen gradient
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In the absence of oxygen, hydrogen carriers cannot
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transfer
energised electrons to the chain and ATP production is halted.
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3.
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production
is halted.
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Blood
Sugar Level
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1.
What is the normal
blood sugar level?
2.
How our body maintain our
normal blood sugar?
What is the treatment for this condition
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1.
For the majority of healthy individuals, normal blood sugar
levels are between 4.0 to 5.4 mmol/L (72 to 99 mg/dL) when fasting and up to
7.8 mmol/L (140 mg/dL) 2 hours after eating.
2.
Insulin, glucagon, and other hormone levels rise and fall
to keep blood sugar in a normal range. Normally, blood glucose levels
increase after you eat a meal. When blood sugar rises, cells in the pancreas
release insulin, causing the body to absorb glucose from the blood and
lowering the blood sugar level to normal. When blood sugar drops too low, the
level of insulin declines and other cells in the pancreas release glucagon,
which causes the liver to turn stored glycogen back into glucose and release
it into the blood. This brings blood
sugar levels back up to normal.
3.
Glucose will help boost blood sugar levels in the short
term. One way to get additional glucose is to consume 15 grams of
carbohydrates. Orange juice or another fruit juice is an easy way to get
extra glucose into the bloodstream. Eat foods
that are high in high complex
carbohydrates, such as pasta and whole grains, to sustain blood sugar levels
after a period of hypoglycemia.
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