Human Physiology: An Integrated Approach (8th Edition)
8th Edition
ISBN: 9780134605197
Author: Dee Unglaub Silverthorn
Publisher: PEARSON
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Textbook Question
Chapter 15.5, Problem 13CC
In the classic movie Jurassic Park, Dr. Ian Malcolm must flee from the T. rex. Draw a reflex map showing the cardiovascular response to his fight-or-flight situation. Remember that fight-or-flight causes epinephrine secretion as well as output from the cardiovascular control center. (Hints: What is the stimulus? Fear is integrated in the limbic system.)
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The following medications are used to treat an exacerbation of congestive heart failure. Each one of them is actually used to counteract mechanisms the body has naturally set in place in response to a drop in blood pressure and presumed drop in tissue perfusion. For each medication, explain its affect(s) on A, B, and C. If you feel it has no effect on a particular parameter, then say "no effect".
Specifically for each:
A) affect on TPR (total peripheral resistance) and how/why it changes it
B) affect on cardiac output (contractility, heart rate, stroke volume) and how/why it changes it
C) blood volume/pressure and how/why it changes it
ACEIs (ACE inhibitors)
Beta blockers
Digoxin
Nitrates (nitroglycerin, isosorbide)
Diuretics like Lasix
Fill in the following blanks (a - f) regarding the Baroreceptor Reflex Control:
The baroreceptor reflex control is a negative feedback loop.
If the patient is hypotensive, they are experiencing a decrease in blood pressure detected by
(a.)_
located in the aortic and carotid bodies.
The afferent pathways include the (b.)_
nerve and the (c.)__
nerve.
These synapse at the cardioregulatory and vasomotor integration centers located in the
(d.)_
These centers will cause the heart rate to (e.)(increase/decrease) and blood vessels to (f.)
(vasodilate/vasocontrict).
For the toolbar press ALT+510 (BC) or ALTHEN±+510/Mad
When you exercise, your heart speeds up, and a greater volume of blood is pumped around the body to meet demands. Both heart rate and stroke volume are affected by changes in blood gases, blood pressure, temperature and movement.
Make reference to the following to help structure your answer:
Inputs:
Chemoreceptors
Stretch receptors
Thermoreceptors
Pressure receptors
How the information is processed by the brain
Effectors – what nerves regulate heart rate in response to changes in each direction.
Explain this concept in no more than 300 words. You must make reference to the nervous system in the control of these events.
Chapter 15 Solutions
Human Physiology: An Integrated Approach (8th Edition)
Ch. 15.2 - Would you expect to find valves in the veins...Ch. 15.2 - Prob. 2CCCh. 15.2 - Who has the higher pulse pressure, someone with...Ch. 15.2 - The formula given for calculating MAP applies to a...Ch. 15.2 - Prob. 5CCCh. 15.3 - Resistance to blood flow is determined primarily...Ch. 15.3 - Prob. 7CCCh. 15.3 - Prob. 8CCCh. 15.3 - Skeletal muscle arterioles have both - and...Ch. 15.4 - Prob. 10CC
Ch. 15.4 - Prob. 11CCCh. 15.5 - Prob. 12CCCh. 15.5 - In the classic movie Jurassic Park, Dr. Ian...Ch. 15.6 - A man with liver disease loses the ability to...Ch. 15.6 - Prob. 15CCCh. 15.7 - Prob. 16CCCh. 15.7 - Malnourished children who have inadequate protein...Ch. 15 - Prob. 1RQCh. 15 - Prob. 2RQCh. 15 - Prob. 3RQCh. 15 - Prob. 4RQCh. 15 - Prob. 5RQCh. 15 - Prob. 6RQCh. 15 - List the factors that aid venous return to the...Ch. 15 - Prob. 8RQCh. 15 - Prob. 9RQCh. 15 - Prob. 10RQCh. 15 - Prob. 11RQCh. 15 - Most systemic arterioles are innervated by the...Ch. 15 - Match each event in the left column with all...Ch. 15 - Which organs receive more than two-thirds of the...Ch. 15 - By looking at the density of capillaries in a...Ch. 15 - Prob. 16RQCh. 15 - Prob. 17RQCh. 15 - Define edema. List some ways in which it can...Ch. 15 - Prob. 19RQCh. 15 - Prob. 20RQCh. 15 - Calcium channel blockers prevent Ca2+ movement...Ch. 15 - Prob. 22RQCh. 15 - Prob. 23RQCh. 15 - Define myogenic autoregulation. What mechanisms...Ch. 15 - Left ventricular failure may be accompanied by...Ch. 15 - Robert is a 52-year-old nonsmoker. He weighs 180...Ch. 15 - The following figure is a schematic representation...Ch. 15 - Prob. 28RQCh. 15 - Draw a reflex map that explains Anthonys vasovagal...Ch. 15 - Prob. 30RQCh. 15 - Prob. 31RQCh. 15 - Prob. 32RQCh. 15 - Prob. 33RQCh. 15 - Prob. 34RQCh. 15 - Prob. 35RQCh. 15 - Prob. 36RQCh. 15 - Prob. 37RQCh. 15 - Prob. 38RQCh. 15 - Prob. 39RQ
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