CPR 1
Part 1: LM & EM
-movement you cannot see it with em
Part 2: projection & cross sections
Part 3: scale of things:
Part 4: real cell organelle
1 = mitochondrion
2 = Golgi apparatus
3 = nucleus
4 = endoplasmatic reticulum
5 = secretory vesicles
, CPR 2
There is one cell visualised in this image.
Dark-coloured A-band is made of myosin
laments.
Light coloured I-bands are made of actin
laments.
During contraction, both the I band and
the H zone get smaller, while the A band
stays the same size.
Smooth muscle tissue doesn’t show the stripy pattern of A- and I-bands. Which bands control the
contraction of smooth muscle cells? Myosin and actin
What is the role of the multiple membrane layers of myelin in axon function?
-insulate agains charge-leakage of the axon
-speed up the action potential velocity travelling over the axon
-support regeneration of peripheral axon
The post synapse shows dark, protein-rich area on the plasma
membrane. What is the name of this area, and what is its role in
synapse function?
Postsynaptic density, this contains the neurotransmitter receptors
The EM at the right shows the
contact point between a neuron and a skeletal muscle. How is
this contact point called?
Neuromuscular junction
What is the main neurotransmitter regulating neurotransmission
between nerve and muscle?
Acetylcholine
Shows a blood vessel in the brain. With the white part being the
lumen of the blood vessel. Two cross sections cell types are
indicated by A and E. Which cell type are these? Astrocyte
Cross section E: endothelial cell
Cells A and E are separated by a dark grey line, indicated by the
arrowheads. What structure is shown in this line? Basal lamina
Cella A and E together with the dark grey line form a functional unit.
What is the name of this? The blood-brain barrier
fi
Part 1: LM & EM
-movement you cannot see it with em
Part 2: projection & cross sections
Part 3: scale of things:
Part 4: real cell organelle
1 = mitochondrion
2 = Golgi apparatus
3 = nucleus
4 = endoplasmatic reticulum
5 = secretory vesicles
, CPR 2
There is one cell visualised in this image.
Dark-coloured A-band is made of myosin
laments.
Light coloured I-bands are made of actin
laments.
During contraction, both the I band and
the H zone get smaller, while the A band
stays the same size.
Smooth muscle tissue doesn’t show the stripy pattern of A- and I-bands. Which bands control the
contraction of smooth muscle cells? Myosin and actin
What is the role of the multiple membrane layers of myelin in axon function?
-insulate agains charge-leakage of the axon
-speed up the action potential velocity travelling over the axon
-support regeneration of peripheral axon
The post synapse shows dark, protein-rich area on the plasma
membrane. What is the name of this area, and what is its role in
synapse function?
Postsynaptic density, this contains the neurotransmitter receptors
The EM at the right shows the
contact point between a neuron and a skeletal muscle. How is
this contact point called?
Neuromuscular junction
What is the main neurotransmitter regulating neurotransmission
between nerve and muscle?
Acetylcholine
Shows a blood vessel in the brain. With the white part being the
lumen of the blood vessel. Two cross sections cell types are
indicated by A and E. Which cell type are these? Astrocyte
Cross section E: endothelial cell
Cells A and E are separated by a dark grey line, indicated by the
arrowheads. What structure is shown in this line? Basal lamina
Cella A and E together with the dark grey line form a functional unit.
What is the name of this? The blood-brain barrier
fi
