Answer:
The correct options are: stomach, mouth, eyes, skin
Explanation:
Eyes: Our tears contain an enzyme which is beneficial in breaking down the cell wall of many bacteria's.The blinking of the eye also stops many bacteria's o enter into the eye.
Skin: The skin of a person acts as a barrier between any foreign pathogen and the body of a person. The hair present on the skin tend to trap many microorganisms and prevent them from entering into the body.
Mouth: Our mouth produces saliva which has many enzymes to kill pathogens in food.
Stomach: The stomach acids tend to kill any pathogens which enter through swallowing.
Answer:
Hydrogen ion (H+) pumps work against their concentration gradient and therefore they need energy inputs from sources such as ATP
Explanation:
The hydrogen ion (H+) pumps are proteins that move protons across biological membranes. These pumps use energy in the form of ATP in order to generate a proton gradient on one side of the membrane. For example, in plants, H+ pump ATPases are able to generate an electrochemical gradient in the plasma membrane. In this case, the proton gradient is employed to drive secondary transport processes, thereby enabling the uptake of diferent metabolites such as nutrients, sugars, amino acids, etc., from the extracellular space.
Answer:I
Daniel Boone (1734–1820) and Davy Crockett (1786–1836) became two real-life icons of pioneer history.
Explanation:
Explanation:
A lysosome is a membrane-bound cell organelle that contains digestive enzymes. Lysosomes are involved with various cell processes. They break down excess or worn-out cell parts.
I think the answer is false!
