A. Bacteria because plants & animals can't obtain nitrogen directly from the atmosphere.
Skin nerve impulses initiated in mechanoreceptors are transmitted along type B fiber
<h3>What are mechanoreceptors ?</h3>
These detect mechanical deformation e.g. touch or pressure within the skin; stretch receptors in muscles. * mechanoreceptor cells answer a change in the external stimulus (pressure, temperature, etc) by producing voltage pulses across neurons (i.e. generator potentials)
<h3>Where are mechanoreceptors found?</h3>
Mechanoreceptors are sensory neurons or peripheral afferents located within joint capsular tissues, ligaments, tendons, muscle, and skin. Four primary sorts of afferent mechanoreceptors are commonly present in noncontractile capsular and ligamentous structures in human joints: types I, II, III, and IV
<h2>What sends impulses from the skin?</h2>
First-order neurons receive impulses from skin and proprioceptors and send them to the medulla spinalis . They then synapse with second-order neurons. Second-order neurons sleep in the dorsal horn and send impulses to the thalamus and cerebellum
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Answer: c.initiation of some nerve impulses
Explanation:
Cerebrospinal fluid is a clear, colorless fluid that can be found in the brain and spinal cord. It is secreted by meninges and choroid plexus. It is absorbed by the arachnoid granulations.
The primary function of the CSF is to act as a cushion to the brain within the skull to serve as a shock absorber and prevents the injury from the blow. It also circulates the chemicals and nutrients filtered from the nerves and also removes the waste from the brain produced by the cerebral metabolism hence reduces the wastes from the brain.
The cerebrospinal fluid does not function in the initiation of the nerve impulses.
61% of emerging diseases is caused by zoonotic pathogens
Explanation:
Out of total emerging diseases zoonotic contributes 61%, that are originated from wildlife. The rate is increasing due to growth of human population, its mobility, frivolous, cultural and their socioeconomic purposes. Air is the major source for spread of infectious diseases. Zoonoses are generally caused by bacteria, viruses and pathogens that are blowout between animals and human beings. Modern zoonoses are Ebola virus and salmonella. One of such direct zoonoses is rabies, that is transformed directly from animal to human.
organisms that do aeriobic respiration
C6H12O6+6O2--->6CO2+6H20
Or in some cases fermemtative fungus(Saccharomyces cerevisae)
C6H12O6--->2CO2+2C2H5O