"The layer that contracts to churn food or move food along 2.Layer consisting of a membrane that lines a body cavity that opens to the exterior; overlays smooth muscle 3.Areolar connective tissue layer located deep to the mucosa 4.A serous membrane that is the external layer of a GI tract organ"

1.)MUSCULARIS

2.) MUCOSA

3)SUBMUCOSA

4) SEROSA

Explanation:

Muscularis reffers to the smooth muscular layer of the wall of contractile organ found in our body or the thin layer of smooth muscle that forms part of a mucous membrane.One of its main function is in aiding

the propelling of nutrients from the lumen to the submucosa.

mucosa reffers to the membrane that covers different cavities in the body and also lines the surface of internal organs in the body. It has layers of epithelial cells that lyes on the layer of loose connective tissue in the body.

Serosa is found in the organs ofabdominal cavity( outer wall ) it reffers to the membrane that consist of a thin layer of cells.

the answer that best describes the relative refractory period in the neuron is the resting membrane potential is restored, but concentrations of sodium and potassium are not restored to their original state.

the refractory period is the time during which another stimulus given to the neuron will not lead to a second potential. thus, because na+ channels are inactivated during this time, additional depolarizing stimuli do not lead to new action potentials.  

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glycolysis is a process that fuel your metabolism. it is apart of cellular respiration the process that produce atp.