Energy decreases as it moves up the trophic levels because energy is lost as metabolic heat when the organisms from one trophic level are consumed by organisms from the next level.
Answer: Option A
Explanation:
The opening and closing of the voltage gated channels depends on the type of the receptors on it. The cells responds according to the receptors found on the cell membrane.
According to the voltage gated channels the domains that are sensitive towards the gated channels are he particular neurotransmitter can have different receptors on them.
An excitatory postsynaptic potential causes channels to move in and shows excitatory response.
Whereas in case of the Inhibitory postsynaptic potential the channels are closed and they show inhibitory response.
Hence, some of the channels remains closed and some of them remains open after signals.
First it is a kind of protein that is capable of pumping out compounds. For example, sodium potassium ATPhase is a transmembrane pump that pumps out 3 Na+ ions for the cell.
Two of the characteristics of all living things are 1) growth and development (as seen in adolescents and pregnancy) and 2) maintaining homeostasis --- to maintain homeostasis during these periods of rapid growth and development, metabolism must be upkept as well. They are all related.