Biomedical Engineering Reference
In-Depth Information
Ca
þ2
pump. Assume that the membrane is permeable
15.
The following membrane has an active
Ca
þ2
and
Cl
, and the
Ca
þ2
pump flow is
to both
J
p
. The width of the membrane is
d
. Find the
.
Ca
þ2
pump flow as a function of
Ca
++
Ion Pump
Ca
++
Ca
++
Cl
-
Outside
Cl
-
Ca
++
Inside
Ca
++
K
þ
and
Cl
. The active pump transports
K
þ
from the
16.
The membrane shown is permeable to
outside to the inside of the cell. The width of the membrane is
.
(a) Write an equation for the flow of each ion. (b) Find the flows at steady-state. (c) Find the
pump flow as a function of
d
. (d) Qualitatively describe the ion concentration on
K
½
i
K
½
o
each side of the membrane.
K Ion Pump
K
+
Cl
-
K
+
Outside
Cl
-
Inside
K
+
K
+
17.
The following membrane is given with two active pumps. Assume that the membrane is
permeable to
Na
þ
,
K
þ
, and
Cl
and
J
p
ðÞ¼
J
p
N
ðÞ¼
J
p
. The width of the membrane is
d
.
as a function of
Cl
½
i
Cl
½
o
Solve for the quantity
J
p
.
Na-K Ion Pump
K
+
Na
+
K
+
Cl
-
Na
+
Outside
Cl
-
Inside
Na
+
K
+
K
+
Na
+
Continued
