(a)[1]
State one reason why mammary gland cells stimulated by hPRL need more glucose.
(b(i))[2]
An investigation was carried out to examine the movement of glucose and hPRL across a Visking tubing membrane. Complete the column in Table 5.1 headed colour obtained after testing.
(b(ii))[2]
With reference to the conclusions drawn in Table 5.1, explain the movement of hPRL and reducing sugar across Visking tubing membrane.
(c)[2]
Outline how glucose crosses the cell surface membranes of mammary gland cells.
(i)[2]
Complete Table 5.1's column headed colour obtained after testing.
(ii)[2]
With reference to the conclusions drawn in Table 5.1, explain the movement of hPRL and reducing sugar across Visking tubing membrane.
(d)[4]
Explain why breast milk production can be described as a cell signalling process.