Answer:
The initial effect of a stimulus on a sensory receptor is a small, local change in membrane potential called a(n) <u>receptor potential</u>.
Explanation:
The process used by sensory receptors to transform the physical energy of the sensory stimulus into action potentials, the fundamental unit of information in the nervous system, is called sensory transduction. The entrance of positive charges towards the interior (mainly Na +), will cause a depolarization; while if there is an exit of positive charges from the interior (mainly K +) then hyperpolarization will occur. This change in membrane potential is called the receptor potential. A receptor potential is then a local potential that can sometimes represent the only response that results from the transduction process, for example in the taste sensory cell.
Answer:
Mass extinction is when biodiversity or species in a living habitat decreases to about three-fourths of its original number or to none. Such an event is identified by a sharp change in the diversity and abundance of multicellular organisms. It occurs when the rate of extinction increases with respect to the rate of speciation. Mass extinctions are usually associated with organisms that are macroscopic rather than microscopic. Examples of mass extinctions are Permian extinction of marine species, and Cretaceous extinction of various species, including dinosaurs.
Answer:
chlorophyll is the green pigment on the leaves of plant
Explanation:
- Carbon has 4 valence electron means it can form covalent bonds with 4 different elements per carbon atoms
- Carbon can bond with itself to form long chains
- Carbon can form single, double and even triple bonds with other elements including other carbon atoms.
- Carbon atom has a small size to fit in comfortably as parts of very large molecules.
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Answer:
The movement of the plates sometimes leads to earthquakes and tsunamis.