Biology
5th Edition
ISBN: 9781260487947
Author: BROOKER
Publisher: MCG
expand_more
expand_more
format_list_bulleted
Concept explainers
Question
Chapter 53.2, Problem 1EQ
Summary Introduction
To propose:
A hypothesis to explain why the blood pressure of dogs eventually returned to normal after standing up even after denervation of carotid and aortic baroreceptors.
Introduction:
The baroreceptors present in the blood vessels help to determine the blood pressure. The pressure of the blood is always maintained to supply oxygen to the bloodand remove carbon dioxide from it. The removal of these receptors can disturb the pressure maintaining homeostasis mechanism of the body.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solutionStudents have asked these similar questions
ERCISE 36 Electrical Activity of the Heart
Use this grid to graph the heart rates observed after exercise. Be sure to label your graph completely and accurately.
bon
Put in Order (rearrange these heart structures in the order through which
electrical signals are conducted in a single cardiac cycle)
Put in Order
1.
atrial myocardium
AV bundle branches
nim
2.
AV bundle
AV node
subendocardial (Purkinje) fibers
SA node
3.
4.
5.
ventricular myocardium
6.
Fill-in (complete each statement with the correct term)
7.
1. Relaxation of a heart chamber is called _?_.
2. Contraction of a heart chamber is called _?_.
3. The portion of the ECG that represents ventricular repolarization is the _?.
4. Leads I, II, and III together are called the _?_ leads, or appendicular leads.
5. ? is the condition of elevated heart rate.
Fill-in
1.
2.
3.
4.
5.
a 0010 bu Floouior Inc All rights reserved.
Descrive (in the correct order) the sequence of the blood flow through a four chambered mammalian heart. Be sure to address the following:
1. Begin with the return of oxygen poor blood from the body.
2. Describe the chemical O2/ CO2 and glucose content of the blood in the key locations.
3. Describe the machanisms that regulate the functioning of the system to maintain homeostasis.
From the experimental activity for PhysioEX
Which of the following forms the (Y) axis of this graph
Which of the following forms the (X) axis of this graph
(A) Y - vessel length / X - flow rate
(B) Y - flow rate / X - vessel length
(C) Y - flow rate / X - peripheral resistance
(D) Y - peripheral resistance / X - flow rate
Chapter 53 Solutions
Biology
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- Canvas ← X Ⓡ Question 22 The corresponding mechanical events of P wave and the QRS complex are oo O Depolarization of the ventricles; repolarization of the atria O O O Depolarization of the ventricles; polarization of the SA Node contraction of the atria; contraction of the ventricle Contraction of the AV node; relaxation of the SA node Repolarization of the ventricles; polarization of the atria and ventricles and respectively?arrow_forwardProject Controlling Red Blood Cell Loss During Surgery A typical volume of blood in the human body is about 5 L. A certain percentage of that volume (called the hematocrit) consists of red blood cells (RBCs); typically the hematocrit is about 45% in males. Suppose that a surgery takes four hours and a male patient bleeds 2 L of blood. During surgery the patient's blood volume is maintained at 5 L by injection of saline solution, which mixes quickly with the blood but dilutes it so that the hematocrit decreases as time passes. 1. Assuming that the rate of RBC loss is proportional to the concentration of RBCs, determine the patient's concentration of RBCs by the end of the operation. 2. A procedure called acute normovolemic hemodilution (ANH) has been developed to minimize RBC loss during surgery. In this procedure blood is extracted from the patient before the operation and replaced with saline solution. This dilutes the patient's blood, resulting in fewer RBCs being lost during the…arrow_forwardGive typed explanation Which of the following is the correct order of events of coagulation? (1) thrombin converts fibrinogen to fibrin (2) fibrin strands form the clot (3) prothrombin activator is formed (4) prothrombin converted to thrombin 4, 1, 2, 3 1, 2, 3, 4 3, 4, 1, 2 2, 1, 4, 3arrow_forward
- Listen Frogs have small lungs relative to their body size and they are often filled with parasitic trematodes. How can they survive without this respiratory surface? #analyze Frogs obtain considerable oxygen through specialized rectal structures called respiratory trees Frogs are ectotherms and don't require oxygen O Frog lungs are much more efficient than those of animals with larger lungs relative to body size O Frogs obtain considerable oxygen through their moist integumentarrow_forwardDescribe all the events (steps) that occur during a cardiac cycle for mammals (organisms with a double circulation). Please include in your description all the steps illustrated in slide #16 of the Cardiovascular System PowerPoint presentation (Lectures 5&6), as well as the opening and closing of all heart valves (refer to slide #21), and the signals arising from the SA and AV nodes (shown in slide #25). How does this cycle contribute to metabolic homeostasis for our cells, and what is the purpose of the valves?arrow_forwardIn counter-current flow within fish gills, A. oxygen-poor water is in contact with oxygen-rich blood; B. water is shunted around to touch both sides of the capillaries; C. as the fish contracts muscles alternately, water flows over both sides of gills; D. oxygen-poor water is in contact with oxygen-poor blood:arrow_forward
- Please answer fast a) Xena chases Callisto, the temperature inside her leg muscles starts to rise. Describe the effect of increased temperature on local autoregulatory control of blood flow in the affected leg muscles. b) Consider the venous return in Xena’s body and explain how it changes during exercise. Provide your rationale. c) Explain how the change of venous return you described in response to the previous question affects Xena’s cardiac output. Discuss your answer. d) Xena is a fit, young person. Compare the change of Xena’s heart rate during physical exercise to that of an unfit and older individual and justify your observation.arrow_forwardQuestion:- How is blood returned to the heart from the legs in humans if veins have almost no blood pressure? Please describe the factors/mechanismsarrow_forward*DO NOT COPY AND PASTE THE ANSWER THAT CHEGG HAS FOR THIS QUESTION. I HAVE ASKED THIS QUESTION AND THE "EXPERT" COPIED AND PASTED THE ANSWER FROM CHEGG. PLEASE ACTUALLY SOLVE THIS PROBLEM, OR I'LL JUST HAVE TO CANCEL MY BARTLEBY SUBSCRIPTION. Hello, please answer the following Physiology question completely and correctly. Thank you. Physiology Question Based On Attached ECG: "On the pressure curve label the stretches on the ventricular curve that represent the 5 different phases of the cardiac cycle. Also, label where they are closing. Where would the AV valves be opening and where would the semilunar valves be opening?"arrow_forward
- eat) Thanks to the Doppler effect we can calculate the velocity at which blood is moving through the aorta. Once the average velocity over multiple heartbeats is known (cm/sec), what other parameter is required to calculate the cardiac output (cm3 . sec-1)? a) The volume of the left atrium (cm³) b) The length of the aorta (cm) c) The volume of the left ventricle (cm3) d) The cross-sectional area of the aorta (cm2)arrow_forwardShow computation 2. A physician orders 1 unit packed RBC to infuse over 4 hours. A unit of blood contains 250ml. The BT set delivers 10gtts/ml. A nurse prepares to set the flow rate at how many drops per minute? 3. Calculate the IV flow rate for 1200 mL of NS to be infused in 6 hours. The infusion set is calibrated for a drop factor of 15 gtts/mL.arrow_forwardAPPLIED PROJECT CONTROLLING RED BLOOD CELL LOSS DURING SURGERY A typical volume of blood in the human body is about 5 L. A certain percentage of that volume (called the hematocrit) consists of red blood cells (RBCS); typically the hematocrit is about 45% in males. Suppose that a surgery takes four hours and a male patient bleeds 2.5 L of blood. During surgery the patient's blood volume is maintained at 5 L by injection of saline solu- tion, which mixes quickly with the blood but dilutes it so that the hematocrit decreases as time passes. 1. Assuming that the rate of RBC loss is proportional to the volume of RBCS, determine the patient's volume of RBCS by the end of the operation. 2. A procedure called acute normovolemic hemodilution (ANH) has been developed to minimize RBC loss during surgery. In this procedure blood is extracted from the patient before the operation and replaced with saline solution. This dilutes the patient's blood, resulting in fewer RBCS being lost during the…arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
- Biology (MindTap Course List)BiologyISBN:9781337392938Author:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. BergPublisher:Cengage Learning
Biology (MindTap Course List)
Biology
ISBN:9781337392938
Author:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg
Publisher:Cengage Learning