Polymers of amino acids that are linked in linear chains and that contain atoms of nitrogen are called

Polymers of amino acids that are linked in linear chains and that contain atoms of nitrogen are called are called polypeptides

Answer

Polypeptides

Polypeptides are polymers of amino acids that are linked in linear chains and that contain atoms of nitrogen.

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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the menstrual cycle – higher tier. negative feedback mechanisms affect the production of hormones in the menstrual cycle. oestrogen also stimulates the release of lh (luteinising hormone) from the pituitary gland, which in turn controls the production of progesterone.