Videos
Mark the following statements as true or false. If a statement is false, correct it to make a true statement.
a. The heart is located in the mediastinum slightly to the left of the midline.
b. The heart consists of two superior ventricles and two inferior atria.
c. Arteries always carry oxygenated blood away from the heart, and veins always carry deoxygenated blood toward the heart.
d. The pulmonary circuit delivers blood from the right side of the heart to the lungs to become oxygenated.
e. The heart plays a role in the regulation of blood pressure and secretes the hormone atrial natriuretic peptide.
To review:
Whether the following statements are true or false. Also, the false statements are to be corrected.
a. The heart is located in the mediastinum, slightly to the left of the midline.
b. The heart consists of two superior ventricles and two inferior atria.
c. Arteries always carry oxygenated blood away from the heart, and veins always carry deoxygenated blood toward the heart.
d. The pulmonary circuit delivers blood from the right side of the heart to the lungs for it to be oxygenated.
e. The heart plays a role in the regulation of blood pressure and secretes the atrial natriuretic peptide hormone.
Introduction:
The heart is situated on the left side of the thoracic cavity. It consists of four chambers: two atria and two ventricles. Pumping of oxygenated blood away from the heart and carrying deoxygenated blood back is the main function of the heart.
Explanation of Solution
a. The statement,“The heart is located in the mediastinum, slightly to the left of the midline” is true. The mediastinum is a subdivision of the thoracic cavity, located between the two lungs. It not only houses the heart, but also the blood vessels, trachea, andesophagus. The heart lies in the cavity of the mediastinum, and is called the pericardial cavity.
b. The statement, “The heart consists of two superior ventricles and two inferior atria” is false. The heart has four chambers, which include the two ventricles and the two atria. The left and right atria lie superior while the left and right ventricles lie inferior. So, the correct statement is “The heart consists of two superior atria and two inferior ventricles”.
c. The statement, “Arteriesalways carry oxygenated blood away from the heart, and veins always carry deoxygenated blood toward the heart” is true. The pulmonary arteriesare known to carry deoxygenated blood to the lungs for it to be oxygenated, and, in the systemic circuit, arteries deliver oxygenated blood to the systemic capillaries. The veins of the pulmonary circuit deliver oxygenated blood to the left side of the heart, while the veins (of the systemic circuit) deliver deoxygenated blood toward the heart and away from the body.
d. The statement, “The pulmonary circuit delivers blood from the right side of the heart to lungs to become oxygenated” is true. The pulmonary pump is located on the right side of the heart. It pumps blood into a series of blood vessels that directs it to the lungs. The pulmonary arteries deliveroxygen-poor and carbondioxide-rich, or deoxygenated, blood to the lungs to make it oxygenated.
e. The statement, “The heart plays a role in the regulation of blood pressure, and secretes the atrial natriuretic peptide (ANP) hormone” is true. The heart also acts as an endocrine organ. ANP decreases the concentration of sodium ion retention in the kidney and lowers the blood pressure. This reduces the osmotic water retention and also helps in reducing the pressure and volume of blood in the blood vessels.
Thus, it can be concluded that the heart lies in the mediastinum. It consists of two inferior ventricles and two superior atria. Thearteries are responsible for carrying oxygenated blood away from the heartand toward the tissues. Also, veins are responsible for carrying deoxygenated blood towards the heart.
Want to see more full solutions like this?
Chapter 17 Solutions
Human Anatomy & Physiology
- Molecular Biology Please help with question. Thank you in advance. Discuss, compare and contrast the structure of promoters inprokaryotes and eukaryotes.arrow_forwardMolecular Biology Please help with question. Thank you You are studying the expression of the lac operon. You have isolated mutants as described below. In the absence of glucose, explain/describe what would happen, for each mutant, to the expression of the lac operon when you add lactose AND what would happen when the bacteria has used up all of the lactose (if the mutant is able to use lactose).1. Mutations in the lac repressor gene that would prevent the binding of lactose2. Mutations in the lac repressor gene that would prevent release of lactose once lactose hadbound3. Normally the lac repressor gene is located next to (a few hundred base pairs) and upstreamfrom the lac operon. Mutations in the lac repressor gene that move the lac repressor gene 100,000base pairs downstream.4. Mutations in the lac operator that would prevent binding of lac repressorarrow_forwardYou have returned to college to become a phylogeneticist. One of the first things you wish to do is determine how mammals, birds, and reptiles are related. Like any good scientist, you need to consider all available data objectively and without a preconceived “correct” answer. In pursuit of that, you should produce a phylogenetic tree based only on morphological features that show birds and mammals are more closely related. You will then produce a totally different tree, also using morphological features, that shows birds and reptiles are more closely related. Do not forget to include all three groups in both your trees. Based solely off the trees you produce, which relationship would you consider the more likely and why? Once you have answered that question, provide a brief summary of the “modern” understanding of the relationship between these three groups.arrow_forward
- true or false, the reason geckos can walk on walls is hydrogen bonding between their foot pads and the moisture on the wall.arrow_forwardBiology laboratory problem Please help. thank you You have 20 ul of DNA solution and 6X DNA loading buffer solution. You have to mix your DNA solution and DNA loading buffer before load DNA in an agarose gel. The concentration of the DNA loading buffer must be 1X in the DNA and DNA-loading buffer mixture after you mix them. For that, I will add _____ ul of 6X loading buffer to the 20 ul DNA solution.arrow_forwardBiology lab problem To make 20 ul of 5 mM MgCl2 solution using 50 mM MgCl2 stock solution and distilled water, I will mix ________ ul of 50 mM MgCl2 solution and ________ ul of distilled water. Please help . Thank youarrow_forward
- Biology Please help. Thank you. Biology laboratory question You need 50 ml of 1% (w/v) agarose gel. Agarose is a powder. How would you make it? You can ignore the volume of agarose powder. Don't forget the unit.TBE buffer is used to make an agarose gel, not distilled water. I will add _______ of agarose powder into 50 ml of distilled water (final 50 ml).arrow_forwardAn urgent care center experienced the average patient admissions shown in the Table below during the weeks from the first week of December through the second week of April. Week Average Daily Admissions 1-Dec 11 2-Dec 14 3-Dec 17 4-Dec 15 1-Jan 12 2-Jan 11 3-Jan 9 4-Jan 9 1-Feb 12 2-Feb 8 3-Feb 13 4-Feb 11 1-Mar 15 2-Mar 17 3-Mar 14 4-Mar 19 5-Mar 13 1-Apr 17 2-Apr 13 Forecast admissions for the periods from the first week of December through the second week of April. Compare the forecast admissions to the actual admissions; What do you conclude?arrow_forwardAnalyze the effectiveness of the a drug treatment program based on the needs of 18-65 year olds who are in need of treatment by critically describing 4 things in the program is doing effectively and 4 things the program needs some improvement.arrow_forward
- I have the first half finished... just need the bottom half.arrow_forward13. Practice Calculations: 3 colonies were suspended in the following dilution series and then a viable plate count and microscope count was performed. Calculate IDF's, TDF's and then calculate the CFU/mL in each tube by both methods. Finally calculate the cells in 1 colony by both methods. Show all of your calculations in the space provided on the following pages. 3 colonies 56 cells 10 μL 10 μL 100 μL 500 με m OS A B D 5.0 mL 990 με 990 με 900 με 500 μL EN 2 100 με 100 μL 118 colonies 12 coloniesarrow_forwardDescribe and give a specific example of how successionary stage is related to species diversity?arrow_forward
Medical Terminology for Health Professions, Spira...Health & NutritionISBN:9781305634350Author:Ann Ehrlich, Carol L. Schroeder, Laura Ehrlich, Katrina A. SchroederPublisher:Cengage Learning
Fundamentals of Sectional Anatomy: An Imaging App...BiologyISBN:9781133960867Author:Denise L. LazoPublisher:Cengage Learning