Neurotransmitters are the chemical molecules, which help in transfer of the signals from one neuron to another. Inside the neurons, the signals are transferred as electrical signals, but at junction of two neuron, which is known as synapse, the signals are transferred in chemical forms.
These neurotransmitters have a definite shape and are recognized by the receptors present in the receptor site of the succeeding neuron. The neurotransmitters from the synapse binds to the receptor site of the receiving neuron. binding of the neurotransmitter to the receptor causes excitation of the receiving neuron, which also known as postsynaptic neuron.
Hence, Like a key in a lock, the shape of the neurotransmitter must bind with the receptors of the receiving neuron.
Answer:
By the process of cellular differentiation which consists of physical and functional changes of the cell used by processes at the genetic level. The expression of these in each type of cell is different. That is to say that the type of cell follows at a time of development there is differential activation of some genes and repression of others
Abstract shapes that suggest plant forms or human anatomy without explicitly resembling anything nameable and allude to these natural organic forms are called <u>Biomorphic</u>.
These shapes may look like leaves, flowers, clouds—things that grow, flow, and move. The term biomorphic means: life-form (bio=life and morph= form). Biomorphic shapes are often rounded and irregular, unlike most geometric shapes.
Biomorphic forms are those that represent natural forms often in an abstract way, relying on contour, patterns, and textures to draw a connection to nature. This can appear in architectural or structural form, or in smaller, more decorative applications.
To learn more about biomorphic forms, here
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Youngest to oldest would be: 3, 4, 1, 5, 2. Since it's from the bottom, the ones furthest from the bottom would be the youngest at the top. The oldest fossils would be closest to the bottom.
A molted external skeleton.
