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3 years ago

Give an example of mechanical and chemical digestion?

Biology

2 answers:

Karo-lina-s [1.5K]3 years ago

7 0

Answer:

Mechanical digestion begins in the mouth as the food is chewed. Chemical digestion involves breaking down the food into simpler nutrients that can be used by the cells.

Explanation:

Chemical digestion begins in the mouth when food mixes with saliva. Saliva contains an enzyme (amylase) that begins the breakdown of carbohydrates.

babunello [35]3 years ago

6 0

Answer:

Mechanical digestion begins in the mouth as the food is chewed. Chemical digestion involves breaking down the food into simpler nutrients that can be used by the cells. Chemical digestion begins in the mouth when food mixes with saliva. Saliva contains an enzyme (amylase) that begins the breakdown of carbohydrates

Explanation:

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Select the correct statement about the three-chambered hearts of amphibians and nonbird reptiles. A scheme of blood circulation

Soloha48 [4]

Answer:

The three-chambered hearts of amphibians and nonbird reptiles are facultative, allowing variation in blood flow through the heart.

Explanation:

In Anatomy, cardiac cycle can be defined as a complete heartbeat of the human heart which comprises of sequential alternating contraction and relaxation of the atria and ventricles, therefore causing blood to flow unidirectionally (one direction) throughout the human body.

Generally, the cardiac cycle occurs in two (2) stages;

I. Diastole : in this stage, the ventricles is relaxed and would be filled with blood.

II. Systole: at this stage, the muscles contracts and thus, allow blood to be pushed through the atria.

All amphibians and reptiles except for crocodiles (having four-chambered heart) have three-chambered hearts, which typically comprises of a partially divided ventricle and two atria.

Hence, the correct statement about the three-chambered hearts of amphibians and nonbird reptiles is that, the three-chambered hearts of amphibians and nonbird reptiles are facultative, allowing variation in blood flow through the heart due to the partially divided ventricle.

7 0

3 years ago

In which process, identified in the image, is a mutation first able to develop?

gtnhenbr [62]

Transcription is the process of converting the message in DNA into mRNA, this is where mutations can first occur. Mutations at the level of DNAcan affect the production of proteins in the long run.

3 0

3 years ago

2. Why do the scientists continue to collect data about the ecology of the Hudson River 20 years after the invasion of the zebra

iragen [17]

Answer:

This link will hopwfully help, Sorry i have never done this.

3 0

3 years ago

What is the function of enzymes in cells

Agata [3.3K]

Enzymes are biological molecules (typically proteins) that significantly speed up the rate of virtually all of the chemical reactions that take place within cells. They are vital for life and serve a wide range of important functions in the body, such as aiding in digestion and metabolism.

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4 years ago

The nurse is teaching an inservice program to a group of nurses on the topic of children diagnosed with rheumatic fever. The nur

scoundrel [369]

Answer: Option A

Explanation:

Rheumatic fever is a disease which affects the joints of the body. It also affects the skin and brain of the body.

Rheumatic fever symptoms is very similar like the common cold and fever. This fever can also occur after the throat infection which is caused due to group of bacteria known as Streptococcus.

It has the ability to cause sore throat, scarlet fever and infections in different parts of the body.

Rheumatic fever takes places if the strep throat and scarlet fever is not treated on time.

6 0

3 years ago