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Human nutrition
Digestion
Function of the liver
The heart
Transport of respiratory gases (HL)
100
Define "Diet"
The total food intake by an organism
100
Name the glands that secrete digestive juices into the lumen of the gut
Exocrine glands
100
In terms size amongst the internal organs, what ranking does the liver hold?
First
100
Which chamber pumps blood to the lungs?
Right ventricle
100
What's he oxygen saturation of oxygenated RBC haemoglobin?
100%
200
What is an essential nutrient?
Nutrients that must be consumed; cannot be made
200
How do you lower the risk of bowel cancer, haemorrhoids, and appendicitis.
Eat fibre
200
How long do red blood cells last?
120 days
200
What is the oxygen concentration of blood in the pulmonary artery?
Low
200
What is ventilation
Replacement of stale air with fresh air
300
What is the common name for ascorbic acids
Vitamin C
300
Name 2 methods of absorption in the intestine
Simple diffusion, facilitated diffusion, active transport, pinocytosis
300
What is an erythrocyte more commonly known as?
Red blood cell
300
What is the name of the tissue that separates the chambers?
Septum
300
Name 2 ways carbon dioxide is carried in the blood
Dissolved in the blood As carbonic acid Bound to haemoglobin
400
List 1 essential amino acid
Arginine, histidine, lysine, trytophan, threonine, phenylalanine
400
Name a material in the diet that are egested and not absorbed. (Be more specific than fibre)
Cellulose, lignin, pectin, chitin
400
List the 2 blood vessels that supply the liver
Hepatic portal vein Hepatic artery
400
What is the time delay between impulses reaching the atrioventricular node from the sinoatrial node?
0.3 seconds
400
What's the difference in oxygen concentration at higher altitudes (compared with sea level)?
No difference, however pressure is lower
500
What does PKU stand for?
Phenylketonuria
500
In what decade did Dr Barry Marshal and Dr Robin Warren discover the real cause of stomach ulcers
1980s
500
Hepatocytes convert cholesterol into what?
Bile salts
500
What is the role of purkinje fibres?
Propagate impulse across ventricle walls.
500
How many alpha and gamma protein chains is feotal haemoglobin made up of
2 alpha and 2 gamma