Concept explainers
To determine: How the effects of low-level tobacco smoking on forced expiration volume differ from those of low-level marijuana smoking.
Concept introduction: Smoking has a wide range of negative health effects. It increases the risk of lung infection and many types of cancer. Tobacco contains more than 40 carcinogens. Tobacco smokers have a higher risk of cardiovascular disease. Another smoking material is marijuana which contains carbon monoxide and an assortment of carcinogens, including arsenic and ammonia, but few studies have not found an increased risk of lung cancer who only smokes marijuana. The people who smoke both marijuana and tobacco seem to have more respiratory problems than those who smoke only tobacco.

Explanation of Solution
Forced expiration volume is the volume of air that an individual can exhale after a deep inhalation. Smoking alters lung function that results in breathing problem that can change the forced expiration volume.
The data represented is based on the study done for effects of smoking to assess lung function by the Coronary Artery Risk Development in Young Adults (CARDIA). The study involves about 5,000 people aged between 18 to 30 years old in a long-term study. The study was followed for 20 years and periodical assessment of habit, health, and lung function was conducted to know how the lifetime use of tobacco and marijuana affects the forced expiration.
Refer to Fig. 38.19 “Association between marijuana or tobacco smoking and the change in forced expiration volume (FEV)” in the textbook, the low-level of tobacco use causes a direct decrease of FEV, but the low level of marijuana use causes an increase in FEV first, and then a decrease in FEV. In comparison to tobacco use, the decrease in FEV is low in the marijuana user.
Tobacco causes decrease in FEV right away, but marijuana causes an increase in FEV first, and then a decrease in FEV.
Want to see more full solutions like this?
Chapter 38 Solutions
Biology: The Unity and Diversity of Life
- How much ATP will be produced during the following metabolic scenario: Aerobic respiration of a 5mM lipid solution that is made up of one glycerol and an 8-carbon fatty acid and 12-carbon fatty acid. Recall that when glycerol breaks down to Glyceraldehyde-3-phosphate it costs one ATP but your get an extra FADH2. Every two carbons of a fatty acid break down to one acetyl-CoA. (pathways will be provided on the exam) Units cannot be entered in this style of question but the units of your answer should be in mM of ATP.arrow_forwardWhen beta-lactamase was isolated from Staphylcoccus aureus and treated with a phosphorylating agent, only the active site, serine was phosphorylated. Additionally, the serine was found to constitute 0.35% (by weight) of this beta-lactamase enzyme. Using this, calculate the molecular weight of this enzyme and estimate the number of amino acids present in the polypeptide.arrow_forwardBased on your results from the Mannitol Salt Agar (MSA) media, which of your bacteria were mannitol fermenters and which were not mannitol fermenters?arrow_forward
- help tutor pleasearrow_forwardQ8. A researcher wants to study the effectiveness of a pill intended to reduce stomach heartburn in pregnant women. The researcher chooses randomly 400 women to participate in this experiment for 9 months of their pregnancy period. They all need to have the same diet. The researcher designs two groups of 200 participants: One group take the real medication intended to reduce heartburn, while the other group take placebo medication. In this study what are: Independent variable: Dependent variable: Control variable: Experimental group: " Control group: If the participants do not know who is consuming the real pills and who is consuming the sugar pills. This study is It happens that 40% of the participants do not find the treatment helpful and drop out after 6 months. The researcher throws out the data from subjects that drop out. What type of bias is there in this study? If the company who makes the medication funds this research, what type of bias might exist in this research work?arrow_forwardHow do I determine the inhertiance pattern from the pedigree diagram?arrow_forward
- 22. Which of the following mutant proteins is expected to have a dominant negative effect when over- expressed in normal cells? a. mutant PI3-kinase that lacks the SH2 domain but retains the kinase function b. mutant Grb2 protein that cannot bind to RTK c. mutant RTK that lacks the extracellular domain d. mutant PDK that has the PH domain but lost the kinase function e. all of the abovearrow_forwardWhat is the label ?arrow_forwardCan you described the image? Can you explain the question as well their answer and how to get to an answer to an problem like this?arrow_forward
- Case Studies In Health Information ManagementBiologyISBN:9781337676908Author:SCHNERINGPublisher:CengageComprehensive Medical Assisting: Administrative a...NursingISBN:9781305964792Author:Wilburta Q. Lindh, Carol D. Tamparo, Barbara M. Dahl, Julie Morris, Cindy CorreaPublisher:Cengage Learning
- Essentials Health Info Management Principles/Prac...Health & NutritionISBN:9780357191651Author:BowiePublisher:Cengage
