Answer
Elastin fibers are glycoproteins found in the lungs and are usually in large quantities. The abundant elastin fibers are helpful in the recoil process of the lungs after being expanded by the muscles of the respiratory system.
During inhalation,the diaphragm and intercostal muscles expand the chest. This forms a negative pressure and draws the air in.The Lungs recoil to expel used up air during exhalation.
Answer:
Submergent plants are totally submerged, with all parts growing under water. Floating plants are not rooted like emergent or submergent plants. They float along the water's surface instead.
Explanation:
<span>D. Alveolus, bronchiole, bronchus, trachea, larynx, pharynx, nasal cavity</span>
The correct answer is:
electronegativity
Explanation:
Electronegativity is a model of an atom's strength to attract the shared electrons of a covalent bond to itself. If atoms bonded together have the same electronegativity, the allotted electrons will be moderately shared. If the electrons of a bond are higher attracted to one of the atoms (because it is more electronegative), the electrons will be unevenly shared. If the difference in electronegativity is large enough, the electrons will not be allowed at all; the more electronegative atom will "take" them happening in two ions and an ionic bond.
