Individual neurons in the brain communicate via synapses. These connections between cells are central to brain function and are regulated by many different genes. Although sponges do not have these synapses, their genome still encodes many synaptic genes. Four days. 2021
What kind of nervous system does the sponge have?
Sponges are the only multicellular animals without a nervous system. There are no nerve cells or sensory cells. However, touching or applying pressure to the outside of the sponge causes the body to contract locally.
How do sponge cells communicate?
This study found that the sponge contains about 25 genes that are very similar to the human genes found in the "synapses" of nerve cells called neurons. .. Synapses are bulb-like connections that neurons use to communicate. In humans and many other animals, they play an important role in learning and memory. 2007
Why doesn't the sponge need the nervous system?
Adult sponges are immobile, but can respond to specific physical stimuli despite the lack of traditional organs and sensory systems. Since the sponge has no nerves or brain, it does not have the ability to cognitively control movement.
Do sponges have nerves and muscles?
Sponges are the simplest animals, and unlike most other animals, they have no nerves or muscles. They sit stationary on rocks, are insensitive to changes in the surrounding environment, and cannot react at all. But their indifference seems to be deceptive.
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