ANOREXIA Flashcards
(28 cards)
State which nutrient deficiency causes anemia
Iron
What part of haemoglobin molecule does the nutrient in iron fit into
Haem group
Identify the outline test you would carry out to identify if an individual had anemia
Full blood count - number of rbc per ml
Haemocrit - centrifuge a sample of blood; measure the proportion of the total blood volume occupied rbc
Haemoglobin concentration - use a spectrophotometer to measure a specific wavelength corresponding to haemoglobin molecule
What do you use to measure haemoglobin concentration
Sprectophotometer
What type of molecule is cholesterol
Steroid
Where is cholesterol normally found in the body
Phospholipid bilayer / fluid mosaic model
Suggest why anorexia reduces fertility and cause loss of periods
Hormones are required for fertility (LH, oestrogen, progesterone, FSH)
Extreme fat loss slows / stops steroid production
outline the role of pancreas in producing insulin
- endocrine gland secreting hormones directly into blood stream
- beta cells contained in pancreas produce and release insulin
- ## when blood sugar levels are too high, pancreas releases more insulin to help cells absorb excess glucose
Outline the role of pancreas regulating blood sugar
Too high = insulin secreted into blood, liver converts glucose into glycogen, glucose levels decrease
Too low = glycogen is secreted into blood, liver does not convert glucose into glycogen, glucose levels increase
What is the role of the large intestine
Absorb water
What is the role of the small intestine
Digest food
Where does ultrafiltration take place
Bowman’s capsule
Describe ultrafiltration
High hydrostatic pressure forces h2o, urea, glucose, ions, amino acids out
Outline process of ECG on patient
Placing wet electrodes directly on skin - these detect tiny electrical changes on the slaking that arise from elecrical activity of the heart during each heart brat
Picked up by a recording device
Wave patterns indicate frequency of waves
What happens at atrial systole
Atria contract increasing atrial pressure
Pressure exceeds ventricular pressure ; forcing blood through the open AV valves into the ventricles
The semilunar valves remain closed as ventricular pressure is lower than arterial pressure
What happens at ventricular systole
Vertices contact increasing ventricles pressure
Once pressure exceeds atrial pressure, the AV vales close
when ventricular pressure surpasses artery pressure, semilunar vales open and blood moves into the arteries
What happens at diastole
Heart muscles relaxes
When ventricular pressure falls below aortic and pulmonary artery pressures, the semilunar valves close
As ventricular pressure drops below atrial pressure the AV valves open
Blood flow passively from the artia into the ventricles
How does anorexia affect the digestive system
Reduced food intake slows digestion
May cause constipation, bloating and abdominal pain
What is anemia
Low rbc count that causes fatigue and weakness
What are the advantages of oral administration for patients with anorexia
Easy to administer
Non invasive
Convenient
What are the disadvantages of oral administration for patients with anorexia
Patient may refuse medication, poor absorption if malnourished
What are laxatives and how do they affect the body when overused
Stimulate bowel movement to relieve constipation
Overuse can cause dehydration, electrolyte imbalances, damage to digestive tract
How does anorexia impact cardiovascular system
Weakens heart muscle mass
Leads to low blood pressure, slow heart rate and risk of heart failure
What does lack of iron lead to
Decrease in haemoglobin production
