<span>In the algae the term “colony” is used for a wide variety of organisms which have the single common attribute of being two or more cells associated regularly in a fashion such that this association is recognized as the morphological type of a genus and species.</span>
Answer:
The charges inside and outside of the neuron before receiving a stimulus are negative and positive, respectively, which corresponds to the transmembrane rest potential.
Explanation:
Neuron is the specialized cell of the nervous system in charge of transmitting electrical impulses. The generation of a nerve impulse in the form of an electric current is due to a change in the transmembrane potential.
<u>Outside the neuron cell, electrical charges are predominantly positive, and the ion with the highest concentration is sodium. In the intracellular space, a great quantity of proteins provide negative charge, and there is a predominance of potassium ions</u>. Under these conditions, the ionic channels are closed.
For this reason, a neuron at rest, before receiving a stimulus, presents positive charges on the outside and negative charges on the inside, and the membrane potential in this condition is estimated at a value of -65 mV.
Once a stimulus is produced, the ionic channels open and Na+ ions enter the cytoplasm, exchanging them for K+, which implies a change in the membrane potential which, on reaching the threshold, produces an action potential and the nerve impulse is produced.
A. The scientific theory of evolution is the fundamental concept underlying all of biology.
B. The scientific theory revolution is supported by multiple forms of scientific evidence.
C. Organisms are classified based on their evolutionary history.
D. Natural selection is a primary mechanism leading to evolutionary change.
The answer is hydrogen bonds
