F211 AS Biology

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what is the function of cholestrol in the membrane
this steroid molecule provides stability
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what do channel proteins transport
polar substances such as ions
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what is the function of glycoproteins and glycolipids
cell adhesion, antigens and cell signalling
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what do carrier proteins transport
larger molecules such as glucose
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how does a carrier protein transport molecules
the binding of the molecule causes deformation of the protein
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how do fat-soluble molecules move through the membrane
simple diffusion through the membrane
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Crenation is...
when a animal cell shrinks and appears wrinkled
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the DNA and histone proteins together are called...?
chromatin
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Inspiration causes:
diaphragm contracts, pressure decreases, intercostals contracts, volume of chest cavity increases
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Expiration causes:
diaphragm relaxes, intercostals relax, pressure increases, volume of chest cavity decreases
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what arteries lie on the surface of the heart
coronary arteries
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what initiates a a wave of excitation?
the SinoAtrial Node (SAN) also known as the pacemaker
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why is there a delay at the Atrioventricular node?
to allow the atria to finish contracting and for the blood to flow down in to the ventricles
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in the lymphatic system, the pressure is higher at which end?
arterial
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Where does some of the tissue fluid drain to?
lymph vessels
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what do channel proteins transport

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polar substances such as ions

Card 3

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what is the function of glycoproteins and glycolipids

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Card 4

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what do carrier proteins transport

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Card 5

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how does a carrier protein transport molecules

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