To explain: The reason why a cell sufficient with nutrients commits cell suicide when it does not receive any signal from other cells.
Concept introduction: Cell signaling is of three types. Endocrine signaling is where the cell secretes ligands called hormones that is sent through the blood stream to a target cell that is located far away from the origin cell. In paracrine signaling, the effector molecules do not enter the blood stream like the endocrine signaling, rather these molecules disseminate through the extracellular matrix and remain locally in the neighborhood of cells which secreted them and hence they are also known as local mediators. Autocrine signaling is a form of paracrine signaling where the cell secretes a ligand for itself to initiate a signaling cascade where the ligand is regulated to stay in the local vicinity.
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Essential Cell Biology (fifth Edition)
- What is the opening indicated by the pointer? (leaf x.s.) stomate guard cell lenticel intercellular space none of thesearrow_forwardIdentify the indicated tissue? (stem x.s.) parenchyma collenchyma sclerenchyma ○ xylem ○ phloem none of thesearrow_forwardWhere did this structure originate from? (Salix branch root) epidermis cortex endodermis pericycle vascular cylinderarrow_forward
- Identify the indicated tissue. (Tilia stem x.s.) parenchyma collenchyma sclerenchyma xylem phloem none of thesearrow_forwardIdentify the indicated structure. (Cucurbita stem l.s.) pit lenticel stomate tendril none of thesearrow_forwardIdentify the specific cell? (Zebrina leaf peel) vessel element sieve element companion cell tracheid guard cell subsidiary cell none of thesearrow_forward
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- Identify the tissue. parenchyma collenchyma sclerenchyma ○ xylem O phloem O none of thesearrow_forwardPlease answer q3arrow_forwardRespond to the following in a minimum of 175 words: How might CRISPR-Cas 9 be used in research or, eventually, therapeutically in patients? What are some potential ethical issues associated with using this technology? Do the advantages of using this technology outweigh the disadvantages (or vice versa)? Explain your position.arrow_forward
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