Which is found after calcium entry through synaptic NMDA receptors?

b$.$ Inactivation of CREB activity

c$.$ Activation leading to mitochondrial dysfunction.

d$.$ Induction of cyclic AMP response element binding protein $($CREB$)$ activity

e$.$ Inactivation of brain derived neurotrophic factor $($BDNF$)$ gene expression.

a$.$ Activation of cell death pathway.

Question $40$

In the continued presence of the stimulus to open, after opening initially, some voltage$-$gated channels will close and remain closed for the remainder of the stimulus. This is called

c$.$ deactivation.

a$.$ activation.

d$.$ contraction.

e$.$ desensitization.

b$.$ inactivation.

Question $41$

If the sodium ion concentration is $130$ mM outside and $12$ mM in the cytoplasm, and sodium selective channels open with the membrane potential at $+80$ mV $,$ which will occur?

e$.$ Sodium channels will inactivate.

b$.$ The net flux of sodium ions will be outward.

c$.$ There will be no net flux of sodium ions$-$it will be equal in and out.

a$.$ The net flux of sodium ions will be inward.

d$.$ There will be no movement of sodium ions across the membraNe. Can you check if these are correct?