Human embryonic stem cell research uses stem cells cultured from the blastula. These cells are pluripotent, meaning that these stem cells can develop many different types of human cells. Identify the part of the blastula that they are using and explain your choice.

Please help Place the images of the cell division in the right order and label them a)  What is the final product of this type of cell division? Indicate the number of dauahter cells, the TYPE OF CELLS (somatic cells? sex cells? other?), where in the body this process takes place, whether they are genetically diverse pridentical, haploid or diploid, the chromosome number in human cells, whether they contain sinale- or double-stranded chromosomes, and what the "fate" of these cells is i.e. what will they go on to do, if given the chance)?

Categorize each statement as an example of adhesion, communication, or differentiation. Statement During animal development, proliferating cells become organized into sheets of cells called epithelia. Cadherins play and essential role in maintaining the integrity of these sheets in a process known as: Complex multicellular organisms rely on signaling molecules synthesized by one cell to bind to receptors on the surface of a second cell to regulate gene expression. This type of interaction between two different cells is a form of: The human body contains 200 distinct cell types, yet each cell contains the same genome. The process by which each cell adopts a specific fate is known as: differentiation Answer Bank adhesion communication Category

Which of the following is NOT an advantage of autologous embryonic stem cell development and differentiation in-vitro? O They can be used to treat degenerative or damaged tissues without being rejected by the individual's immune system O They have very high pluripotency O All of the above are advantages O It can be used for treating infertility O They can be differentiated into many tissue types using appropriate growth factors * Previous Next

Discuss the relationship between protooncogenes and tumor suppressor genes and cancer. ( no intro and please make it short 4-5 sentence) if possible

Tobacco smokers (and those exposed to tobacco smoke) are at greater risk of an ectopic (tubal) pregnancy. Based on your understanding of the structures of the cytoskeleton, what is the best explanation?     Tobacco interferes with the transfer of oxygen to the uterus, thereby forcing the zygote to implant in a fallopian tube.     Tobacco smokers tend to get pregnant when they are younger.     Tobacco interferes with the functioning of the flagella propelling sperm.     Tobacco interferes with the sweeping motion of cilia that aids in the movement of the egg toward the uterus.

How does gene activation lead to cell differentiation? Explain the correct answer and explain why the others are wrong. A. Different genes are activated in different cells, causing each cell to have a unique funcation  B. The same genes are actives in every cell of your body, causing every cell to function the same  C. Certain cells only have parts of DNA that causes cell deferentiation  D. Unique genes are in different cells, causing each cell to have a unique function

E. Coli, Chinese hamster ovary (CHO) and HEK293 are all cell lines used to for protein production. a. What differentiates these cells? b. Under what conditions would you use each of these different cells?

HeLa Cells are the most widely used human cell line. They have been used in thousands of studies, leading to countless discoveries. These cells were unknowingly taken from Henrietta Lacks, a Johns Hopkins Medical Center patient. Dr. Gey at Johns Hopkins Medical Center took some of the cells from Mrs. Lacks's cancer and discovered that they could keep growing and dividing indefinitely. Mrs. Lacks did not know these cells were taken from her and neither did any of her family members.  Today, strict guidelines protect individuals participating in a federally funded research study (e.g., in a clinical trial).  The study has to go through a lengthy review and participants receive information about all aspects of the study and provide “informed consent” to participate. These guidelines are known as the Common Rule.  However, the Common Rule does not apply to cells or tissues removed during medical procedures. Scientists can use leftover tissues from surgeries, and biopsies for research…

6)From the menu on the left on Virtual Urchin, click on "embryogenesis to hatching". This will display a video of sea urchin development. Photos of key stages taken with a scanning electron microscope (SEM) are shown next to the video. In addition to watching the video by clicking the play button, you can use the slider at the bottom to move through the stages step by step. Doing this will allow you watch how cell division increases the number of cells from the initial zygote. You'll notice that these divisions start off dividing cells evenly, but at a certain point, there are some smaller cells created. These smaller cells will play very important roles in the later development stages of the urchin, so their creation is a key milestone.   Which round of cell division is uneven? (hint: the SEM images will be helpful) a)First b)Second c)Third d)Fourth e)Fifth