B2, Organisation Flashcards
which blood vessel carries deoxygenated blood away from the heart to the lungs
passage next to the right atrium
Where in the heart are ‘pacemaker cells’ found
right atrium
Where does the drug digitalis originate from
foxgloves
Name the enzyme that digests starch in the human digestive system
amalayse
what is the reagent used to test for starch
iodine solution
what is the reagents used to test for sugar
benedict solution
Name the enzyme that digests protein in the human digestive system
protease
Name the enzyme that digests lipid in the human digestive system
lipase
what is lipid
fat/ oil
what small molecule does protease absorb
where is protease found
- amino acids
- stomach, pancreas and small intestine
what small molecule does amelayse absorb
where in the body do you find amelayse
- glucose
- small intestine, pancreas, salivary gland (mouth)
what small molecule does lipase absorb
where in the body is lipase found
- fatty acid and glycerol
- pancrease and small intestine
where is bile made and stored
where does it go
made in the liver, stored in the gall bladder
goes into the small intestine
what is atheroma
what does it cause
buildup of colesterol in the walls of the coronary artery
narrow lumen meaning less blood can go through
what is a thrombus
blood clot that can block a coronary artery
aneurysm
what can it cause
rupture in a blood vessel due to a weakening of the wall of the artery
reduce the flow of blood through a coronary artery
what is a heart attack
when heart muscle cells (usually) in the left ventricle receive insufficient blood
what is a lumen
hole in the middle of an artery
what types of tissue do artery walls have
elastic and muscle
why does the artery wall have elastic tissue
to pump and accommodate high pressure blood
why does the artery wall have elastic tissue
to help push blood along when the heart is relaxed
why does the artery wall have muscle tissue
to control blood flow to different parts of the body and control blood pressure
non-communicable disease
disease that cannot be passed from one person to another/ not caused by a pathogen
stages in the formation of cancers in humans
- genes that control cell division change (accept mutation)
- cell undergoes uncontrolled division
- malignant spread to different parts of the body
- forming secondary tumors
state 2 advantages of an electron microscope over a light microscope
- higher magnification
- higher resolution
why is it difficult to develop drugs that kill viruses
viruses live and reproduce in cells do those drugs could damage or kill healthy cells
effect of HIV in humans
- presents flu-like symptoms
- attacks the immune system
- immune system becomes so weak it cannot deal with disease or infection
