<span>very acidic ph - stomach
mucociliary escalator - intestines
cerumen and sebum - ear
lysozyme - tears and saliva
keratin and tightly packed cells - skin
</span>
The correct answer is "mucociliary escalator intestines".
The mucociliary escalator is a mechanism that belongs to the bronchi, not the intestines. The mucociliary escalator is a mechanism of self-clearing where cilium, cilia and mucus work together to expel any material that's solid, or not too fluid or gaseous, including pathogens. From the main bronchi to the alveoli there is a moist lining produced by the specific present epithelium. This epithelium presents cilia. The cilia are embedded in mucus. The mucus is what helps in trapping any material that's solid, or not too fluid or gaseous, including pathogens. After these are trapped so that they don't progress to the alveoli, the cilia move in such a way that push the particles again to the exterior of the bronchi, like an escalator.
Definitely #2 is the answer
Answer:
biochemical compound
Explanation:
A biochemical compound is any compound that contains carbon and is found in
living things. They're involved in every process of life, including growth, digestion,
respiration, you name it. There are four classes of biochemical compounds :
carbohydrates, proteins, lipids (fats), and nucleic acids.
Answer:
Yes, the protein is found on the surface of the red blood cell which is represented by a positive or negative sign.
It is termed as Rh factor.
Rh factor refers to the class of antigen or protein found on the red blood cell.
If the protein is present, then the person is said to be Rh positive and when the protein is absent the person is said to be Rh negative.
Because we spin on a side ways axis only showing on side at the time, and the moon also rotates so we don't only see one side of the moon, we only see what our eyes percieve
