Answer:
~ D :)
The study of all the interactions between organisms and the living and nonliving components of their environment is
Ecology
The macromolecule that is present in albumin would be proteins. Also, it has traces of lipids and carbohydrates. The albumins are a family of globular proteins, the most common of which are the serum albumins. All the proteins of the albumin family are water-soluble.
An Engine-generator, commonly called a generator, converts chemical energy in gasoline into rotary mechanical energy, which is converted into B) electrical energy
Answer:
The sodium channel have refractory period.
Explanation:
Action potential are generated at axon hillock of neuron and travel across the neuron in response to stimuli. For the the generation of action potential the steps are stimulus, depolarization, repolarization, hyperpolarization and resting state.
So the first step for action potential after stimulus is depolarization. Depolarization requires the opening of sodium channels to make the inside of neuronal membrane positive. These sodium channels have refractory period. They cannot open immediately after activation. So the sodium channels of one direction in neuron (upstream) become refractory and it is convenent to open the sodium channels of other direction (downstream) of neuron. That why action potential is transmitted in one direction.
It is like the gunpowder placed at a line the fire cannot go back in burnt gun powder direction.
