The fatty tissue is called the
Myelin sheath. <span>The myelin
sheath is a significantly extended and altered plasma membrane wrapped about
the nerve axon in a spiral form. The myelin membranes somes from and are a part
of the Schwann cells in the peripheral nervous system and the oligodendroglial
cells in the central nervous system. Each myelin-spawning cell delivers myelin
for only one segment of any given axon. The intermittent interruptions where
short portions of the axon are left uncovered by myelin are the nodes of
Ranvier, and they are critical to the functioning of myelin.</span>
Natural selection :) In simple terms in the one with the best traits will repopulate so they can have the best traits the individuals who are weak typically die off and no one breeds with them :)
Answer:
Instrumental learning
Explanation:
Associative learning is a form of learning which is performed when two or more events or stimuli controls the learning behaviour. The instrumental learning is a type of learning in which the learning process is associated with the consequence or result of the action.
In the given question, the mouse learns how to step on the lever as a result of the received food in the form of reward or he learned because he received the treatment, therefore, this act of learning will be considered the instrumental learning.
Thus, Instrumental learning is correct.
