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Genrish500 [490]
3 years ago
14

How does a viral immunization help prevent disease

Biology
1 answer:
Lyrx [107]3 years ago
4 0

Answer:

When people get vaccinated they there will be less change of transfer of communicable diseases

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With parallel flow, diffusion of urea happened at regions I and II but not at regions III, IV, or V because...
nikklg [1K]

Answer:B

Explanation:bc all of the other ones was equal together and the concentration gradient could not spread them

5 0
3 years ago
Define embryonic stem cells. Explain the pros and cons of Embryonic Stem Cells
just olya [345]

Answer:

Embryonic stem cells are pluripotent stem cells derived from the inner cell mass of a blastocyst, an early-stage pre-implantation embryo. Human embryos reach the blastocyst stage 4–5 days post fertilization, at which time they consist of 50–150 cells.

Explanation:

 

 Adult Stem Cells  

Embryonic Stem Cells      

Induced Pluripotent Stem Cells      

Pros

Trans differentiate and and reprogramming of these cells is possible but is not well studied

Thought to be less likely to be rejected if used in transplants

Success has already been demonstrated in various clinical applications  

Can maintain and grow for 1 year or more in culture

Established protocols for maintenance in culture

ESCs are pluripotent cells that can generate most cell types

By studying ESCs, more can be learned about the process of development

 

Abundant somatic cells of donor can be used

Issues of histocompatibility with donor/recipient transplants can be avoided

Very useful for drug development and developmental studies

Information learned from the “reprogramming” process may be transferable for in vivo therapies to reprogram damaged or diseased cells/tissues  

Cons

Limitations on ASC ability to differentiate are still uncertain; currently thought to be multi or unipotent.

Cannot be grown for long periods of time in culture

Usually a very small number in each tissue making them difficult to find and purify

Currently there is no technology available to generate large quantities of stem cells in culture

 

Process to generate ESC lines is inefficient

Unsure whether they would be rejected if used in transplants.

Therapies using ESC avenues are largely new and much more research and testing is needed

If used directly from the ESC undifferentiated culture prep for tissue transplants, they can cause tumors (teratomas) or cancer development    

Methods for ensured reproducibility and maintenance, as differentiated tissues are not certain.

Viruses are currently used to introduce embryonic genes and has been shown to cause cancers in mouse studies    

7 0
3 years ago
10. Which of the following is an example of a prevention activity? A. Mobilizing search and rescue teams B. Requiring identifica
Step2247 [10]

Answer:

Option (B).

Explanation:

Fundamentals of Emergency Management (FEMA) may be defined as the organization that helps in the management of resources. This also helps to deal with the all  humanitarian emergency.

Prevention activities to remove the particular danger are also listed in the FEMA.  The identification for the site access previously might helps to reduce the health related and risk related problems of the individuals working at the site.

Thus, the correct answer is option (B).

5 0
3 years ago
A plastic rod becomes negatively charged when it is rubbed with a piece of wool. how does the rob become charged?
gavmur [86]
Electrons are being transferred to the rod therefore giving a negative charge
3 0
3 years ago
List 4 targets of antibiotics.
Aleksandr-060686 [28]

Answer: Antibiotics targets the synthesis of protein, nucleic acid, folate and cell wall.

1. Synthesis of protein; antibiotics binds to either 30s or 50s ribosomal subunits blocking the polypeptide from the exiting the tunnel thus inhibiting a full completion of protein expression or production.

2. Nucleic acid synthesis; Antibiotics also act by inhibiting genetic expression, DNA transcription and replication where DNA makes exact copies of itself, as well as RNA molecules preventing bacterial growth.

3. Cell wall synthesis; Inhibition of cell wall synthesis in microorganisms will prevent it from replication and growth.

4. Folate synthesis; Folic acid also known as vitamin B9 helps in DNA replication and cell division. Folate antagonists such as aminopterin kills bacteria by preventing folic acid production required for DNA replication.

3 0
3 years ago
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