Question

In: Anatomy and Physiology

What enzymes are in saliva When are they activated and inactivated? Do these types of enzymes...

What enzymes are in saliva When are they activated and inactivated? Do these types of enzymes occur anywhere else in the digestive tract?

Solutions

Expert Solution

Complex food substances that are taken by animals and humans must be broken down into simple, soluble, and diffusible substances before they can be absorbed. In the oral cavity, salivary glands secrete an array of enzymes and substances that aid in digestion and also disinfection. They include the following:

lingual lipase: Lipid digestion initiates in the mouth. Lingual lipase starts the digestion of the lipids/fats.

Salivary amylase: Carbohydrate digestion also initiates in the mouth. Amylase, produced by the salivary glands, breaks complex carbohydrates to smaller chains, or even simple sugars. It is sometimes referred to as ptyalin.

lysozyme: Considering that food contains more than just essential nutrients, e.g. bacteria or viruses, the lysozome offers a limited and non-specific, yet beneficial antiseptic function in digestion.

at lower temperature amylase is deactivated and at higher temperature it is denatured. optimum temperature is 32- 32 degree celcius. also pH plays umportant role optimum pH is 6-7 above this pH enzyme is denatured.

No these enzyme does not exist anywhere in the digestive tract.


Related Solutions

How do enzymes increase the rate of biological reactions? Why are enzymes needed? What do we...
How do enzymes increase the rate of biological reactions? Why are enzymes needed? What do we mean by allosteric and covalent enzyme modification when referring to an enzyme’s activity? Give a complete description of each type of regulation and an example. What is saturation? 4 points
What do enzymes do and how do they do it (this question is intentionally vague and...
What do enzymes do and how do they do it (this question is intentionally vague and open ended)?
When NSF is inactivated by NEM, the phenotype observed by the scientists was vesicle accumulation on...
When NSF is inactivated by NEM, the phenotype observed by the scientists was vesicle accumulation on the Golgi membrane. Indicate true (T) or false (F) statements below regarding the observation! 1. The NSF is inactivated, vesicles will only accumulate on Golgi membrane, not on the plasma membrane. 2. Vesicles accumulated on the Golgi membrane because NSF is responsible for providing the ATP to induce membrane fusion. 3. Vesicles accumulated on the Golgi membrane because no t-SNARE is available for fusion....
How do you understand the concept of an activated complex? What is it?
How do you understand the concept of an activated complex? What is it?
what happen to the enzymes of an organism when is placed in an environment at a...
what happen to the enzymes of an organism when is placed in an environment at a temperature higher than the maximum growth temperature? Does the organism die or only stop growing (stop cell division)? Why?
In an activated tRNA molecule, what is attached that makes it “activated” and what is the...
In an activated tRNA molecule, what is attached that makes it “activated” and what is the linkage?
What are the targets for the parasympathetic output? When the parasympathetic system is activated, what happens...
What are the targets for the parasympathetic output? When the parasympathetic system is activated, what happens to the heart? What are the targets for sympathetic output? When the sympathetic system is activated, what TWO things happen to the heart?
1. Some enzymes, require other molecules, co-factors, to become activated and/or to function. a. In general,...
1. Some enzymes, require other molecules, co-factors, to become activated and/or to function. a. In general, describe what type of molecule a co-factor typically is, what it does and the common types of chemical interactions it forms with the enzyme. In your explanation, include the terms: apoenzyme and holoenzyme, and describe how a cofactor affects the enzyme-substrate affinity. b. Compare/contrast the two main classes of cofactors, and describe an example of each (other than the ones presented in lecture). PS:...
Describe the submucosal plexus below. When it becomes activated what is the major physiological response? When...
Describe the submucosal plexus below. When it becomes activated what is the major physiological response? When would this plexus be activated?
Describe the myenteric plexus below. When it becomes activated what is the major physiological response? When...
Describe the myenteric plexus below. When it becomes activated what is the major physiological response? When would this plexus be activated?
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT