The crayfish have its nerve cord on the ventral side rather than on the dorsal side. The ventral side is under the Crayfishes' exoskeleton, as opposed to the dorsal side where the exoskeleton is . If it is attacked it will be from the dorsal side and the nerve cord would be snapped easier. The function of the nerve cord is that if it gets attacked by a predator they will go for the top and it will still be able to move.
They are both light resources.
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Answer:
The correct sequence is 21543.
Explanation:
The procedure by which the signaling molecules known as neurotransmitters are discharged by the neuron's axon terminal and combines and reacts with the receptors present on the dendrites of another neuron or postsynaptic neuron is termed as neurotransmission.
The following are the steps followed in the process of neurotransmission:
a. Exocytosis of neurotransmitter gets stimulated by calcium.
b. The diffusion of neurotransmitter takes place across the synaptic cleft.
c. The binding of neurotransmitters takes place with the receptor.
d. After the binding opening of ion channels takes place.
e. The permeability of the postsynaptic membrane gets changed.
Answer:
The three basic types of adaptations, based on how the genetic changes are expressed, are structural, physiological and behavioral adaptations. Most organisms have combinations of all these types.
Explanation:
Living things are adapted to the habitat they live in. This is because they have special features that help them to survive. The development of these special features is the result of evolution due to gene mutation. These mutations aid in the survival and reproduction and passes on from one generation to the other.
Jeremy is sitting quietly when the muscles in his left leg begin to “twitch.” This activation of movement in his voluntary muscles is most likely due to the release of the neurotransmitter Acetylcholine .
The primary function of acetylcholine is to carry signals from motor neurons to the body's skeletal muscles.