Answer:
The <u>Orbicularis oris</u><u> </u>causes the lips to close and pucker during kissing, whistling and speaking.
Explanation:
<u>Orbicularis oris muscles are facial muscles which are located in the thickness of lip around oral opening. </u>
The muscle consists of two main parts
(a) Marginal part consisting of the longitudinal fibers -Closes the oral opening.
(b)Labial part consisting of the circular fibers - pushes the lips forward.
The main function of the orbicularis oris is closing of the mouth. It puckers the lips when it contracts.
These muscles are used to do actions like kissing, whistling and speaking.
Thus,
The <u>Orbicularis oris </u>causes the lips to close and pucker during kissing, whistling and speaking.
Answer:
a. True
Explanation:
When carbon dioxide (CO2) is combined with water, it enter a so called equilibrium which results in the formation of free hydrogen ions (H+). The equilibrium equation is the following CO2 + H2O←→ HCO3- + H+.
The acidity in the body is measured by pH, which is calculated using the concentration of free hydrogen ions (H+). The higher the concentration of the latter, the more acidic the compound is.
In the case of carbon dioxide (CO2), the concentration of free hydrogen ions (H+) increases due to this equilibrium, therefore carbon dioxide is acidic in the body.
C - is the anwser. Because it’s a skin cancer, not a mole and benign is a tumor
Answer: Option A. "Substrate(s) bind in the active site.
Explanation:
Enzymes can be defined as biological catalysts, that enhances the rate of chemical or biochemical reaction.
Substrate binds to the enzyme on its active site and converts the substrate into a specific product.
Enzymes do not take part in the reaction but it lowers down its activation energy that accelerates the rate of reaction.
Thus, the correct answer is option A.
