University of Maryland Global Campus Biology Discussion

Description

Week 3 Discussion Classmate Responses

You must comment on two classmate’s personal response to the discussion. Your comment on a classmate’s personal response to the discussion must be substantive comment that contributes to their learning. The comment must be a minimum of 100 words. Both classmate’s initial posts are in the attachments.

Below info is in reference to this weeks discussion only, if you need it.

Personal Response:You must post a personal response to the discussion. Do a web or library search to locate a research study about the effects of one or more environmental factors (such as temperature, pH, sunlight, nutrients, carbon dioxide, heavy metals, UV light, air pollution, heavy metals, etc.) that affect cellular respiration or photosynthesis. Identify the process you selected (cellular or photosynthesis) and the factor that the selected study addresses, and describe in your own words the conclusion from this research study.

BIOL 103 Week 3 Discussion Classmate Fernando Carbon dioxide (CO2) is essential for plant photosynthesis, which is the primary way energy from the sun gets into animals, humans, and the rest of the ecosystem. Photosynthesis changes light energy from the sun into chemical energy in the form of carbohydrates, or sugars, the primary energy source for most living things on planet earth; one main concern is that there is too much CO2 in the atmosphere. Plants can react in several ways. However, the effects on the access of CO2 absorption by plants is still being documented and studied; some of the effect range from thicker foliage (Urton, 2018), higher crop yields (Sneed, 2018), and a reallocation of plant mass to increase root size, which might affect how plants absorb water and other nutrients from the soil (NIM, 2017). One common point is the potential negative impact that accesses atmospheric CO2 plant absorption might have on our environment in its contribution to climate change. While its effects on the environment are still being analyzed, some climate models demonstrate that excessive absorption of CO2 by plants might be a contributing factor to climate change and global warming, and must be considered when planning how to fight it. REFERENCES: Urton(2018).UniversityofWashington.https://www.washington.edu/news/2018/10/01/thick-leaveshigh-co2/ Snned(2018).ScientificAmerican.https://www.scientificamerican.com/article/ask-the-experts-doesrising-co2-benefit-plants1/ NationalLibraryofMedicine(2017).https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5550704/ BIOL 103 Week 3 Discussion Classmate Ricardo I had researched the effects that heavy metals have on cellular respiration, specifically arsenic. It was discovered that arsenic can cause cell injury and death by multiple mechanisms. Its interference with cellular respiration explains the potent toxicity of arsenic. Additionally, arsine gas may interact directly with red cell membranes. Arsenic is a known human carcinogen, meaning it is capable of causing cancer in living tissue. While arsenic toxicity may vary by form, inorganic arsenic is generally more toxic than organic arsenic. The type of organic arsenic found in certain seafood (arsenobetaine and arsenocholine) appears to have low toxicity. However, animal studies have shown that other organic arsenic compounds (methyl and phenyl arsenates, for example) can produce health effects similar to those produced by inorganic arsenic. Arsenic also binds with sulfhydryl groups and disrupts sulfhydryl containing enzymes, and as a result of critical enzyme effects, there is an inhibition of the pyruvate oxidation pathway and the tricarboxylic acid cycle, impaired gluconeogenesis, and reduced oxidative phosphorylation. Via my research I have learnt that arsenic not only binds with sulfhydryl groups and disrupts sulfhydryl containing enzymes, but it also replaces the stable phosphorus anion in phosphate with the less stable As (V) anion, leading to rapid hydrolysis of high energy bonds in compounds such as ATP. Additionally, the type of organic arsenic found in certain seafood appears to have low toxicity and finally the fact that arsine gas binds to red blood cells, causing hemolysis which is the destruction of red blood cells. Resources: https://www.atsdr.cdc.gov/ Education Resources (thoughtco.com)

Grid View

	Excellent	Good	Fair	Poor
Main Postinga	45 (45%) – 50 (50%) Answers all parts of the discussion question(s) expectations with reflective critical analysis and synthesis of knowledge gained from the course readings for the module and current credible sources. Supported by at least three current, credible sources. Written clearly and concisely with no grammatical or spelling errors and fully adheres to current APA manual writing rules and style.	40 (40%) – 44 (44%) Responds to the discussion question(s) and is reflective with critical analysis and synthesis of knowledge gained from the course readings for the module. At least 75% of post has exceptional depth and breadth. Supported by at least three credible sources. Written clearly and concisely with one or no grammatical or spelling errors and fully adheres to current APA manual writing rules and style.	35 (35%) – 39 (39%) Responds to some of the discussion question(s). One or two criteria are not addressed or are superficially addressed. Is somewhat lacking reflection and critical analysis and synthesis. Somewhat represents knowledge gained from the course readings for the module. Post is cited with two credible sources. Written somewhat concisely; may contain more than two spelling or grammatical errors. Contains some APA formatting errors.	0 (0%) – 34 (34%) Does not respond to the discussion question(s) adequately. Lacks depth or superficially addresses criteria. Lacks reflection and critical analysis and synthesis. Does not represent knowledge gained from the course readings for the module. Contains only one or no credible sources. Not written clearly or concisely. Contains more than two spelling or grammatical errors. Does not adhere to current APA manual writing rules and style.
Main Post: Timeliness	10 (10%) – 10 (10%) Posts main post by day 3.	0 (0%) – 0 (0%)	0 (0%) – 0 (0%)	0 (0%) – 0 (0%) Does not post by day 3.
First Response	17 (17%) – 18 (18%) Response exhibits synthesis, critical thinking, and application to practice settings. Responds fully to questions posed by faculty. Provides clear, concise opinions and ideas that are supported by at least two scholarly sources. Demonstrates synthesis and understanding of learning objectives. Communication is professional and respectful to colleagues. Responses to faculty questions are fully answered, if posed. Response is effectively written in standard, edited English.	15 (15%) – 16 (16%) Response exhibits critical thinking and application to practice settings. Communication is professional and respectful to colleagues. Responses to faculty questions are answered, if posed. Provides clear, concise opinions and ideas that are supported by two or more credible sources. Response is effectively written in standard, edited English.	13 (13%) – 14 (14%) Response is on topic and may have some depth. Responses posted in the discussion may lack effective professional communication. Responses to faculty questions are somewhat answered, if posed. Response may lack clear, concise opinions and ideas, and a few or no credible sources are cited.	0 (0%) – 12 (12%) Response may not be on topic and lacks depth. Responses posted in the discussion lack effective professional communication. Responses to faculty questions are missing. No credible sources are cited.
Second Response	16 (16%) – 17 (17%) Response exhibits synthesis, critical thinking, and application to practice settings. Responds fully to questions posed by faculty. Provides clear, concise opinions and ideas that are supported by at least two scholarly sources. Demonstrates synthesis and understanding of learning objectives. Communication is professional and respectful to colleagues. Responses to faculty questions are fully answered, if posed. Response is effectively written in standard, edited English.	14 (14%) – 15 (15%) Response exhibits critical thinking and application to practice settings. Communication is professional and respectful to colleagues. Responses to faculty questions are answered, if posed. Provides clear, concise opinions and ideas that are supported by two or more credible sources. Response is effectively written in standard, edited English.	12 (12%) – 13 (13%) Response is on topic and may have some depth. Responses posted in the discussion may lack effective professional communication. Responses to faculty questions are somewhat answered, if posed. Response may lack clear, concise opinions and ideas, and a few or no credible sources are cited.	0 (0%) – 11 (11%) Response may not be on topic and lacks depth. Responses posted in the discussion lack effective professional communication. Responses to faculty questions are missing. No credible sources are cited.
Participation	5 (5%) – 5 (5%) Meets requirements for participation by posting on three different days.	0 (0%) – 0 (0%)	0 (0%) – 0 (0%)	0 (0%) – 0 (0%) Does not meet requirements for participation by posting on 3 different days.
Total Points: 100