LIFE:SCIENCE OF BIOL.(LL) >CUSTOM<
LIFE:SCIENCE OF BIOL.(LL) >CUSTOM<
11th Edition
ISBN: 9781319209957
Author: Sadava
Publisher: MAC HIGHER
bartleby

Videos

Question
Book Icon
Chapter 51, Problem 1Q
Summary Introduction

To review:

The relative medullary thickness (RMT) is a good predictor to determine an animal’s ability to produce concentrated urine or not, based on an RMT vs freezing point depression (FPD) plot.

Given:

The RMT and the FPD for different mammals are given in the Table 1:

Table 1: The RMT and FPD of different mammals.

Animal RMT FPD (ᵒC)
Beaver 1.3 0.96
Pig 1.6 2
Human 3 2.6
Dog 4.3 4.85
Cat 4.8 5.8
Lab rat 5.8 4.85
Kangaroo rat 8.5 10.4
Jerboa 9.3 12
Sand rat 10.7 9.2

Introduction:

RMT refers to the thickness of medulla of the kidney divided by volume (length X width X thickness) of the entire kidney. FPD is a test, which is used to measure the concentration of urine. It is known that fresh water freezes at 0°C, but the addition of solutes lowers this freezing temperature.

Expert Solution & Answer
Check Mark

Explanation of Solution

The graph plot between RMT and FPD is given in the Figure 1.

LIFE:SCIENCE OF BIOL.(LL) >CUSTOM<, Chapter 51, Problem 1Q

Figure 1: Plot of RMT vs FPD.

It can be observed from the graph that as the RMT increases, the FPD also increases. This means that the concentration of the urine increases with an increase in relative length of loops of Henle. The graph follows an almost linearly increasing trend.

A slight deviation from the trend is observed in case of the laboratory rat and the sand rat.

Conclusion

Therefore, it can be concluded that the RMT is a good predictor of the ability of the mammal to produce concentrated urine.

Want to see more full solutions like this?

Subscribe now to access step-by-step solutions to millions of textbook problems written by subject matter experts!
Students have asked these similar questions
A researcher measured the rate of ADH excretion as a function of exercise. Plasma 4 ADH Concentration (pG/mL) 2: 50 100 150 200 250 Exercise (Watts) Perrault et. al. 1989 Based on the graph above, a student could infer that an increase in exercise effects ADH secretion and the resulting water levels in the blood, respectively, in the following way Select one: а. ADH Secretion Water Levels in Blood Increases Decreases b. ADH Secretion Water Levels in Blood Increases Increases С. ADH Secretion Water Levels in Blood Decreases Decreases d. ADH Secretion Water Levels in Blood Decreases Increases CO
What is the adaptive importance of the effect of DPG on the curve?
Does the lambda max increase as the concentration of the sample increase?.
Knowledge Booster
Background pattern image
Biology
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
SEE MORE QUESTIONS
Recommended textbooks for you
Text book image
Human Physiology: From Cells to Systems (MindTap ...
Biology
ISBN:9781285866932
Author:Lauralee Sherwood
Publisher:Cengage Learning
Text book image
Curren'S Math For Meds: Dosages & Sol
Nursing
ISBN:9781305143531
Author:CURREN
Publisher:Cengage
Complications during Labour and Delivery; Author: FirstCry Parenting;https://www.youtube.com/watch?v=QnCviG4GpYg;License: Standard YouTube License, CC-BY