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3 years ago

Distinguish between the bottom-up and top-down models of community organization.

Biology

1 answer:

galina1969 [7]3 years ago

3 0

Answer:

Bottom -up models of community:

The bottom up models of the community represents the unidirectional influence of the community. The model shows from the lower to the higher tropic levels in the community. This model determines the nutrient minerals and the primary producer abundance.

Top - down models of community :

The top down model of the community represents the one tropic level to the other tropic levels. This model is also known as cascade model. This model determines how the one tropic level controls the other tropic level. For example: the control of herbivores by the predators.

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The framework of the spleen is created by a network of reticular fibers made by reticular cells. The framework of the spleen is

Reika [66]

Answer: True.

Spleen framework is created by reticular fibres from reticular cells.

Explanation:

Spleen is an organ found mostly in vertebrates. It develop from mesenchymal cells within the dorsal of mesogastrium near the greater curvature stomach. The mesencymal cells then divide and differentied to form framework of connective tissues of spleen. The framework of spleen is created by reticular fibres of the reticular cells. Reticular fibres are fibres in the connective tissue that is composed of type iii collagen secreted by reticular cells. Spleen function in filtering of blood. It plays a major role in red blood cells and immune system.

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Many scientists believe that the formation process of other terrestrial planets in our solar system was similar to the formation

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The major pathway of communication between the right and left hemispheres is the:.

Sergeu [11.5K]

The major pathway of communication between the right and left hemisphere is the corpus callosum.

The cerebrum is the recognizable gray covering of the human brain, appearing to comprise the majority of its mass.
The cerebral cortex is the wrinkly area; the remainder of the anatomy is hidden behind that layer.
The longitudinal fissure, which is a significant gap between the two sides of the cerebrum, exists.
It divides the brain into right and left cerebral hemispheres, which are two independent parts.
The main channel for communication between the two hemispheres of the cerebral cortex is provided by the white matter of the corpus callosum, which is located deep inside the cerebrum.

learn more about corpus callosum here: brainly.com/question/13094825

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1 year ago

Why is acetylcholine broken down?

Aneli [31]

Acetylcholine broken down is the process by which this neurotransmitter activates a suitable ligand-receptor to trigger a cell signaling pathway.

<h3>What is Acetylcholine?</h3>

Acetylcholine is a chemical messenger (i.e., a neurotransmitter) that is used to transmit signals inside the body.

Acetylcholine broken down is due to its hydrolysis, which ends cell signaling between brain synapses.

In conclusion, Acetylcholine broken down is the process by which this neurotransmitter activates a suitable ligand-receptor to trigger a cell signaling pathway.

Learn more about Acetylcholine signaling here:

brainly.com/question/13993931

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