Stem cells provide new cells for the body as it grows, and replace specialised cells that are damaged or lost. They have two unique properties that enable them to do this: They can divide over and over again to produce new cells. As they divide, they can change into the other types of cell that make up the body.
Hope it helps you in understanding!
Mark my answer brainliest!
Follow me!
Give me a heart if u like it!
DNA replication is the process that leads to the formation of the two chromatids.
DNA REPLICATION:
- DNA replication is the process by which the information in a DNA molecule is used to synthesize another to make two identical copies.
- DNA replication occurs prior to every cellular division in order to enable daughter cells have the correct amount of genetic material.
- DNA molecules are borne on structures called chromosomes. Hence, when the information of a DNA molecule is duplicated, there is need for another chromosome to harbor the replicate.
- Chromosomes containing identical DNA molecules are termed sister chromatids. Sister chromatids are joined together by a centromere.
- Therefore, DNA replication is the process that leads to the formation of the two chromatids.
Learn more at: brainly.com/question/16464230?referrer=searchResults
Answer:
The type of vesicular transport involved in the exporting of protein-based hormones, such as insulin, into the bloodstream is regulated exocytosis.
Explanation:
In general terms, exocytosis is a type of active transport that allows intracellular substances are released to the extracellular space, through of vesicles that fuse with the plasma membrane, which allow the exit of substances from inside the cell.
Regulated exocytosis is the specific vesicular transport for the secretion of substances, such as hormones. For this type of transport to exist, the presence of an extracellular signal is required, which will activate the fusion of the vesicles.
In the case of insulin, the external signal originates with the increase in blood glucose levels, a signal that penetrates the intracellular space and generates an increase in insulin production in the islets of Langerhans (pancreas).
Before insulin secretion occurs, the cell must be depolarized, allowing calcium to enter, which promotes transport by regulated exocytosis of insulin to the extracellular space.
Learn more:
brainly.com/question/1109181
The nine activities that scientists engage in as a part of scientific inquiry are the following:
1. Observe
2. Define the problem
3. Form a study question
4. Research the problem
5. State the expectations (hypothesis)
6. Experiment and gather data
7. Analyze the results
8. Reflect on the findings
9. Communicate with the wider community
Answer:
The three sections of the small intestine are the duodenum,
Explanation:
The duodenum
It receives chyme from the stomachs
Its intestinal cells enzymes such as secrete amylase, sucrase, and lipase enzymes that break down fats and sugars.
The jejunum
It is covered in villi and microvilli giving the name THE PRINCIPAL SITE of digestion.
the ileum.
Aid absorption e.g. amino acids, lipids, fat-soluble vitamins, and vitamin B12.
