BIOLOGY HIGH SCHOOL

During a menstrual cycle, what is the purpose of the uterine lining buildup? dirty 230

Answers

Answer 1
Answer: If the egg is fertilised the embryo plants itself in the uterine lining. Without this it would not survive

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Sodium and potassium need to be pumped and not just travel by passive or facilitated diffusion because the cell is concentrating sodium and ridding itself of potassium.truefalse

Which describes the characteristics of a liquid? A. It has no fixed volume or shape. B. It has a fixed volume and shape. C. It has high energy and expands to fill the container. D. It has a fixed volume and varied shape.

Answers

C. It has high energy and expands to fill the container.
Hint: A or D

Now think about it. You got this!

What are the cellular components of blood? A.) Plasma. Rh factor, and hormones
B.) RBC, WBC, and platelets
C.) Hemoglobin, Carbohydrate A, and Carbohydrate B

Answers

Answer:

B: RBC, WBC, and platelets

Explanation:

The blood is a specialized body fluid that functions as a transport medium within an animal's body. The fluid transports and supplies the body with essential substances such as nutrient and oxygen as well as removal of toxic wastes from the body.

The blood is made up of two main components;

  • The plasma which is the liquid portion of the blood and constitutes about 55% of a typical blood.
  • The cellular components which consist of the red blood cells (RBCs), the white blood cells (WBCs) and the platelets. They make up about 45% of a typical blood with each cell playing important role to ensure effective functioning of the blood.

The correct option is B.
Your answer would be
B. RBCs, WBCs, and platelets
Hope this helped :)

what primary location in the digestive tract do enzymes act to break the bonds between disaccharides so they may be transported for cell use as monosaccharides?

Answers

In the digestive tract, mouth is the primary location where enzymes act to break the bonds between disaccharides into monosaccharides.

What is a digestive tract?

It consists of the gastrointestinal tract along with the accessory organs which are present in digestion process . It involves the breakdown of complex food into smaller components which can be easily assimilated and absorbed by the body.

The digestion process has 3 phases: cephalic phase , gastric phase and intestinal phase.Cephalic phase begins with secretion of gastric juices  from gastric glands in response  to sight and smell of food.It involves chewing and chemical breakdown of food  by the action of digestive enzymes ,saliva in the mouth contain enzymes like lipase  and amylase which are secreted by the salivary and serous glands present on the tongue.

Learn more about digestive tract,here:

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Answer:

Mouth.

Explanation:

Mouth contain saliva.Saliva have enzyme salivary amylase (ptyline) which breakdown disaccharides(starch) into Monoscchrides .About 30% disaccharides(starch ) digeation occur in mouth.

Unlike red blood cells, white blood cells A. can live for many years.
B. carry oxygen through the body.
C. are the most numerous cells in the blood.
D. are made in the bone marrow.

Answers

Answer;

A. can live for many years.

Unlike red blood cells, white blood cells can live for many years.

Explanation;

-Blood has four main components: plasma, red blood cells, white blood cells, and platelets.

-Red blood cells live for only about 120 days. As they wear out and age, they are captured and disposed of by cells in the spleen and other organs.

-White blood cells are different from red blood cells in several important ways. Unlike red cells, white cells are complete cells. They are larger than red cells and have a nucleus. White blood cells are not just carried by the blood stream, they can also move about independently. Additionally, Unlike red blood cells, white blood cells can live for many years.
The answer is neither of the above. All the above features except A relate to the red blood cells. (A is not true for both red blood cells and white blood cells.)Red blood cells or RBCs carry oxygen, are the most numerous cells (36 - 50%) in the blood and they are made in the bone marrow. The life span of RBCs is 120 days or 4 months.On the other hand, white blood cells or WBCs produce antibodies to develop immunity against infections and some are phagocytic against pathogens. They make up about 1% of the blood and are produced in the thymus. The lifespan of WBCs is 4 - 30 days.

Even though the amino acid sequence between subunits of hemoglobin and myoglobin are not exactly the same, there are other similarities between the two proteins. Which level of protein structure is not found in both molecules?

Answers

Answer: The Quaternary structure

Explanation: Myoglobin and hemoglobin are both hemeprotiens with the ability to bind oxygen.

Myoglobin is mainly found in muscle tissue and plays a vital role as an intracellular storage site for oxygen. Myoglobin is a monomeric heme protein and has a secondary and tertiary structure. Hemoglobin is vital for the transportation of oxygen from the lungs to the rest of the body as needed. Hemoglobin is a tetrameric hemeprotien with secondary and tertiary structures.

Both hemoglobin and myoglobin are absent of a quaternary structure.

Which of the following best describes nativism during the 1800s?A- a policy favoring native-born Americans over immigrants
B- an interest in learning about the native cultures of immigrants
C- a regional policy of maintaining traditional economic systems
D- a practice in most factories of hiring only native-born Americans

Answers

The correct answer is:

A- a policy favoring native-born Americans over immigrants

Explanation:

Nativism is the executive position of processing status for several organized inhabitants of a nation as contrasted to requirements of newcomers or aliens. It is characterized by opposition to immigration based on fears that the emigrants will deteriorate or spoil surviving cultural importance.
Out of the choices given, the one that best describes nativism during the 1800s was a policy favoring native-born American over immigrants. People that were born in the United States believed that the natives should get jobs over any immigrants. The correct answer is A. 
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