Answer:
If I remember correctly, its "the plasma membrane".
Explanation:
The plasma membrane is the outer part of the cell and it can control what ever leaves the cell.
It depends on the concentration of nerve receptors in different areas of the skin.
Answer:
Explanation:
What Mendel wanted to happen was to obtain middle-sized plants. What actually happened was that Mendel got tall plants. Due to this result, Mendel called Reccesive to the genes thatdetermined the short offspring, and Dominant to the genes that determined the tall offspring.
The four important characteristics of respiratory surface are:
1. Thin walls
2. Moisture
3. Large surface area
4. Blood supply
Respiratory system or respiratory tract is divided into upper and lower tract. Upper respiratory tract includes nose and its cavities, sinuses, pharynx and the part of the larynx. Lower respiratory tract consists of the trachea, bronchi, bronchioles and the alveoli.
Alveoli are the ends of the respiratory tract the smallest units in it. Alveoli are small folded air sacs that are branching off from alveolar ducts and providing an extremely large surface area for the gas exchange. Gas exchange occurs thanks to small blood vessels – capillaries that surround alveoli and it occurs via the process of diffusion.
So, respiratory surface is thin membrane also known as the blood–air barrier that consists of the alveolar epithelial cells, their basement membranes and the endothelial cells of the alveolar capillaries.
