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13 Dec 2019

Could anyone help me with this question please?

1.Certain cells taken from umbilical cord blood have the potential to treat illnesses such as lymphoma and leukemia. In what way are cord blood cells useful to treat these diseases?

A. They are a source of embryonic stem cells.

B.Cord blood is used for nuclear transplantation in a process called reproductive cloning.

C. Cord blood is not the same as embryonic stem cells, but stem cells from cord blood can be used for all of the same purposes as embryonic stem cells.

D. Cord blood contains stem cells that can be grown and differentiated into some cell types but not all cell types.

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Trinidad TremblayLv2
17 Dec 2019
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Related questions

Pleaserephrase these sentences while maintaining the samemeaning:

1) Reproductive cloning

• has been used to create Dolly the Sheep and many cloned cows,dogs, cats and horses.
• If the low success rates and issues of safety could be improvedas discussed below, the technology can be used to mass-produceanimals with special qualities, such as animals that are importantagriculturally or are able to produce helpful drugs for humanuse
• SCNT has environmental uses in that it can be used to repopulateendangered species, as has been shown with the wild ox and thegaur
• Some supporters of human reproductive cloning also see it as away of overcoming male infertility, where other methods of assistedreproduction have failed.

2) THERAPEUTIC CLONING :It could help advance embryonic stem cellresearch.

• The stem cells have to be able to be isolated from a source andthen grown in the laboratory
• The stem cells have to be able to be turned into thespecific
cell type needed for treatment

3) DNA CLONING is essential to enable enough copies of a gene orDNA segment to be analysed for human genetic testing to diagnosegenetic conditions and enable predictive or presymptomatic genetictesting for genetic conditions in asymptomatic individuals orprenatally (see Genetics Fact Sheets 21 and 17C).It providesmedical benefits in the fields of therapeutic cloning andregenerative medicine.
•It provides great potential for discovering treatments and curesto a plethora of diseases including Parkinson’s disease,schizophrenia, Alzheimer’s disease, Cancer, spinal cord injuries,diabetes and many more.
•Limbs and organs could be grown in a lab from stem cells and thenused in transplants or to help treat illnesses.
•It will help scientists to learn about human growth and celldevelopment.
•Scientists and doctors will be able to test millions of potentialdrugs and medicine, without the use of animals or humantesters.
An advantage of the usage of adult stem cells to treat disease isthat a patient’s own cells could be used to treat a patient. Riskswould be quite reduced because patients’ bodies would not rejecttheir own cells.
•An advantage of using embryonic stem cells is that they candevelop into any cell types of the body, and may then be moreversatile than adult stem cells.
The Advantages of Cloning
　
The fundamental criterion of medical science must be the defenceand promotion of the integral good of the human person, in keepingwith that unique dignity which is ours by virtue of ourhumanity.

Hello can you help me with the following questions:

1. Which part of an udder was transferred to an empty oocyte to clone the sheep Dolly?

a. blastocyst (I think its this one)

b. meiotic spindle

c. intact udder cell

d. nucleus

2. What is the principle of nuclear equivalence?

a. Differentiated cells have lost DNA that codes for other cell types.

b. All nuclei are the same shape.

c. Only nuclei of germ cells contain DNA capable of producing an entire organism.

d. The genome of every somatic cell contains information capable of generating any other cell type in the body.

3. A gene contains 6 exons, numbered 1-6. Which of the following mRNA isoforms is not a possible transcriptional product of this gene?

a. 1-2-3-4-5-6

b. 2-5-3-4

c. 2-4-5-6

d. 5-6

4. Which of the following is a mechanism used to alter gene expression using mRNA transcripts?

a. Different stability (longevity) of mRNA transcripts

b. Inhibition of translation of certain mRNAs

c. Production of small RNA molecules (microRNAs) that block translation

d. All of the above

e. None of the above

5. You have recently started working in an embryology lab and have obtained a large number of unfertilized zebrafish oocytes. You decide to treat the oocytes with RNAse (a protein that will degrade RNAs, but leave DNA proteins intact) prior to fertilizing them. Will the resulting embryos develop into normal fish?

a. Yes, because RNAs from sperm cells can replace those lost from the egg.

b. Yes, because intact DNA is the only factor required for development to proceed.

c. No, because RNAse treatment will damage the structure of the oocyte.

d. No, because maternal mRNAs are required for the early stages of development.

10. The organs associated with the Alimentary Canal share which similarity/similarities? They all belong to the lymphatic system They all belong to the gastrointestinal system Food does not pass directly through them during the process of digestion Food does pass directly through them during the process of digestion Both B and D \

11. Of the five basic functions of the digestive system, which one occurs first? Excretion Absorption Ingestion Peristalsis Digestion

12. The elimination of indigestible material from the body is called _______________. Peristalsis Absorption Defecation Ingestion

13. The pancreas helps to regulate metabolism and blood sugar levels through the release of insulin. Insulin tells the liver to stop sugar production to keep levels regulated within the blood stream. If a person’s pancreas does not function properly, they have a condition called diabetes, a metabolic disease that often requires monitoring of one’s diet. People with Type 1 Diabetes have a pancreas with damaged islet cells, meaning no insulin is produced. People with Type 2 Diabetes have a pancreas that produces insulin properly, but their cells are resistant to this insulin due to various factors that often include but are not limited to obesity, lack of exercise, or poor diet choices. Certain foods, specifically starches and sugars, affect diabetics in different ways. Type 1 diabetics must limit their consumption of sugars in order to keep their blood sugar levels stable. Type 1 diabetics often achieve regulation of blood sugars through injections of insulin. Type 2 diabetics must still pay attention to their diets, but not all of them are dependent on manual injections of insulin. Because Type 2 Diabetes is often brought on through a poor diet, Type 2 diabetics are advised to monitor their food choices to prevent weight gain and achieve a more balanced diet overall. Approximately 90% of Americans with diabetes have Type 2. Which are contributing factors to developing Type 1 Diabetes? Poor liver function Poor pancreatic function Sedentary lifestyle All of the above

14. There are five activities that occur within the gastrointestinal system: • Ingestion – the taking in of food or drink • Peristalsis – the movement of food along the digestive tract • Digestion – the breakdown of food and drink by both mechanical and chemical mechanisms • Absorption – the passage of food into the cardiovascular and lymphatic systems • Defecation – the elimination of substances the body can’t use Many digestive disorders and diseases can be tied to an activity within the gastrointestinal system. For example, inflammation of the digestive tract, commonly known as inflammatory bowel disease, is an example of a gastrointestinal activity breakdown. An inflamed digestive tract means digestion is painful and hindered in some way, affecting the rest of the gastrointestinal activities coming after it. An inability to break down lactose, or “lactose intolerance,” is another example of a breakdown that can occur within the gastrointestinal system. Another example of a breakdown in gastrointestinal activities is an eating disorder, where food is either withheld or ingested at a fast rate. Some disorders include the elimination of food through vomit, in essence reversing some of the activities of the gastrointestinal system. A final example of a breakdown in gastrointestinal activities is constipation, which can often lead to further problems such as bowel impaction if not corrected immediately. A balanced diet is recommended to keep the gastrointestinal system functioning properly, and many over the counter medications can help to correct some breakdowns if caught early enough. Foodborne illness, or food poisoning, happens when spoiled or contaminated food is consumed. A common symptom of food poisoning is vomiting. Though microbes can move from the stomach and into the intestines after vomiting occurs, the food itself gets thrown up, stopping its travel through the gastrointestinal system. During which activity is the food thrown up? Peristalsis Absorption Ingestion Digestion

15. The skin is a vital organ that covers the entire outside of the body, forming a protective barrier against pathogens and injuries from the environment. The skin is the body's largest organ; covering the entire outside of the body, it is about 2 mm thick and weighs approximately six pounds. It shields the body against heat, light, injury, and infection. The skin also helps regulate body temperature, gathers sensory information from the environment, stores water, fat, and vitamin D, and plays a role in the immune system protecting us from disease. The color, thickness and texture of skin vary over the body. There are two general types of skin; thin and hairy, which is more prevalent on the body, and thick and hairless, which is found on parts of the body that are used heavily and endure a large amount of friction, like the palms of the hands or the soles of the feet. Basically, the skin is comprised of two layers that cover a third fatty layer. These three layers differ in function, thickness, and strength. The outer layer is called the epidermis; it is a tough protective layer that contains the melanin-producing melanocytes. The second layer (located under the epidermis) is called the dermis; it contains nerve endings, sweat glands, oil glands, and hair follicles. Under these two skin layers is a fatty layer of subcutaneous tissue, known as the subcutis or hypodermis. The skin contains many specialized cells and structures: • Basket Cells: Basket cells surround the base of hair follicles and can sense pressure. They are evaluated when assessing overall nerve health and condition. • Blood Vessels: Blood vessels carry nutrients and oxygen-rich blood to the cells that make up the layers of skin and carry away waste products. • Hair Erector Muscle (Arrector Pili Muscle): The arrector pili muscle is a tiny muscle connected to each hair follicle and the skin. When it contracts it causes the hair to stand erect, and a "goosebump" forms on the skin. • Hair Follicle: The hair follicle is a tube-shaped sheath that surrounds the part of the hair that is under the skin and nourishes the hair. It is located in the epidermis and the dermis. • Hair Shaft: The hair shaft is the part of the hair that is above the skin. • Langerhans Cells: These cells attach themselves to antigens that invade damaged skin and alert the immune system to their presence. • Melanocyte: A melanocyte is a cell that produces melanin, and is located in the basal layer of the epidermis. • Merkel Cells: Merkel cells are tactile cells of neuroectodermal origin located in the basal layer of the epidermis. • Pacinian Corpuscle: A pacinian corpuscle is a nerve receptor located in the subcutaneous fatty tissue that responds to pressure and vibration. • Sebaceous Gland: Sebaceous glands are small, sack-shaped glands which release an oily substance onto the hair follicle that coats and protects the hair shaft from becoming brittle. These glands are located in the dermis. • Sensory Nerves: The epidermis is innervated with sensory nerves. These nerves sense and transmit heat, pain, and other noxious sensations. When they are not functioning properly sensations such as numbness, pins-and-needles, pain, tingling, or burning may be felt. When evaluating a skin biopsy, total number, contiguity, diameter, branching, swelling, and overall health of the sensory nerves are assessed. • Stratum Corneum: The stratum corneum is outermost layer of the epidermis, and is comprised of dead skin cells. It protects the living cells beneath it by providing a tough barrier between the environment and the lower layers of the skin. The stratum corneum is useful for diagnosis because in some conditions it will become thinner than normal. • Sweat Gland (Sudoriferous Gland): These glands are located in the epidermis and produce moisture (sweat) that is secreted through tiny ducts onto the surface of the skin (stratum corneum). When sweat evaporates, skin temperature is lowered. If you use a product to moisturize your hair, which part of the integumentary system are you targeting? Hair follicle Hair shaft Blood vessels Melanocyte

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