Which of the following is a good source of adult stem cells in humans?Bone marrowMuscle cellsBlood cellsNerve cells

What is a stem cell?An embryo cellAn undifferentiated cellA differentiated cellAn adult cell2Which of the following is a good source of adult stem cells in humans?Bone marrowMuscle cellsBlood cellsNerve cells3Which of the following is an advantage of embryonic stem cells compared with adult stem cells?There are potential ethical issuesThey are totipotentThey are multipotentThey could be rejected when transplanted into an adult4Unspecialised stem cells in plants are grouped together in structures called:MeristemsLeavesStemsShoots5Which of the following statements about plants is not true?Stem cells from plants can be used to produce new plant cells quickly and economicallyThere are no ethical issues with the use of plant stem cellsExposed meristem cells dipped in auxin powder and planted will produce rootsPlants stop growing when they reach adulthood

Which of the following statements about adult or tissue stem cells is CORRECT?Group of answer choicesTissue stem cells are a ready source of cells that can be harvested from a patient and delivered back into that patient.Tissue stem cells can be isolated from any adult tissue and be used to treat a disease in a distant tissue by turning into a new cell type.Tissue stem cells gives rise to all other cell types of the body during development.Tissue stem cells reside in a niche within an adult tissue and are critical for the cellular turnover and maintenance of that tissue alone.

Somatic stem cells (also called adult stem cells) exist naturally in the body. They are important for growth, healing, and replacing cells that are lost through daily wear and tear.Potential as therapyStem cells from the blood and bone marrow are routinely used as a treatment for blood-related diseases. However, under natural circumstances somatic stem cells can become only a subset of related cell types. Bone marrow stem cells, for example, differentiate primarily into blood cells. This partial differentiation can be an advantage when you want to produce blood cells; but it is a disadvantage if you're interested in producing an unrelated cell type.Special considerationsMost types of somatic stem cells are present in low abundance and are difficult to isolate and grow in culture. Isolation of some types could cause considerable tissue or organ damage, as in the heart or brain. Somatic stem cells can be transplanted from donor to patient, but without drugs that suppress the immune system, a patient's immune system will recognize transplanted cells as foreign and attack them.Ethical considerationsTherapy involving somatic stem cells is not controversial; however, it is subject to the same ethical considerations that apply to all medical procedures.

Which of the following cells are multipotent stem cells which are the precursors of many types of connective tissue cells?

Which of the following is an advantage of embryonic stem cells compared with adult stem cells?There are potential ethical issuesThey are totipotentThey are multipotentThey could be rejected when transplanted into an adult