Page 30 - Color Atlas Physiology

A. Ca transport through the ER membrane
2+
Nucleus
1 2
Cytosol

Ca 2+

2+
2+
Ca -ATPase Endoplasmic Signal Ca channel Transport In, Through and Between Cells I
reticulum (ER)
(depolarization,
Ca 2+ hormon, etc.) Discharge
Storage
–5
–8
–8
(10 ) 10 mol/l 2+ Cytosolic 10 –5 (10 )mol/l
Ca concentration
B. Mitochondrial transport
Plate 1.8
Outer membrane
Inner membrane
Matrix ATP synthetase
Crista
Inter- Ribosomes
membranous
space
Granules
Cytosol
1
+
Formation of H gradient 2
+
H gradient driving ATP synthesis and carriers
NADH + H +
NAD + H 2 O Pyruvate –
P i + ADP 3– etc.
+
2H + ½O 2 +
H synthetase ADP 3– P i
Matrix ATP Carrier
ATP 4–
e –
a b c
Enzyme complexes H +
of respiratory chain H + + ATP + +
H + H H H
Intermembranous + H + + ATP 4–
space H H Ca 2+
H +
Cytoplasm
Porins 17
17
Despopoulos, Color Atlas of Physiology © 2003 Thieme
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