1) Neurons propagate signals in the form of action potentials that are mediated by: a.- Na + channels regulated by voltage that open in response to membrane depolarization b.- K + channels regulated .
1) Neurons propagate signals in the form of action potentials that are mediated by: a.- Na + channels regulated by voltage that open in response to membrane depolarization b.- K + channels regulated .
1) Neurons propagate signals in the form of action potentials that are mediated by:
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a.- Na + channels regulated by voltage that open in response to membrane depolarization
b.- K + channels regulated by voltage coupled to neurotransmitters
c.- Ca ++ channels that connect electrical signals to chemical
d.- Chlorine channels regulated by voltage
2) Which of these molecules do not intervene in the Krebs cycle:
a.- Acetyl CoA
B.- Pyruvate
c.- FAD
d.- NAD
3) It is a ligand responsible for the opening of ion channels in the neuromuscular plate
a.- adrenaline
b.- acetylcholine
c.- sodium
d.- calcium
4) Cystic fibrosis is a serious hereditary disease in which there is:
a.- mutation of the genes that code for ABO surface ag
b.- mutation of the genes that encode the proteins that make up the cell’s crust
c.- mutation in the genes that encode the proteins that make up the ion channels
d.- mutation in the ligand that regulates the opening of Ca ++ channels
5) In the previous case the CTFR protein works as:
a.- Calcium channel regulated by cyclic AMP
b.- Channel of k + regulated by cyclic AMP
c.- Na + / K + pump
d.- Chlorine channel regulated by cAMP
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