Campbell Biology
12th Edition
ISBN: 9780135188743
Author: Urry
Publisher: PEARSON
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Textbook Question
Chapter 33, Problem 33.1CR
Lacking tissues and organs, how do soonges accomplish tasks such as gas exchange, nutrient transport, and waste disposa I?
Expert Solution & Answer
Summary Introduction
To determine: How sponges perform “gas exchange, nutrient transport, and waste disposal” without tissues and organs.
Introduction: All sponges belong to the phylum Porifera. They are the simplest animals with the cellular level of organization. They have diverged forms than other animals early in evolution. Most of the body parts of sponges are asymmetrical. Sponges consist of pores in their body called ostia.
Explanation of Solution
The sponges have a relatively simple body plan with all cells of the body in direct contact with water. This allows excretion and exchange of gases to occur through diffusion. The sponges are filter feeders and contain choanocytes (collar cells) that help them to get food. The beating of flagella of choanocyte draws food particles along with water. The food particles stick to collar-like projections of the choanocytes. The food particles are then phagocytized and are either digested or passed on to the other cells called amoebocytes. These amoebocyte cells then transfer it to other cells of the body.
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Digoxin: Intravenous Bolus - Two Compartment Model
Drug
Digoxin
Route:
IV Bolus
Dose:
0.750 mg
Plasma Concentration Time Profile
Beta
Alpha
Time (hrs)
Conc (ng/ml)
LN
(ng/ml)
LN
(ng/ml)
LN
0.00
#NUM!
#NUM!
#NUM!
0.10
12.290
2.509
#NUM!
#NUMI
0.60
6.975
1.942
#NUM!
#NUMI
1.00
4.649
1.537
#NUM!
#NUMI
2.00
2.201
0.789
#NUM!
#NUM!
3.00
1.536
0.429
#NUM!
#NUM!
4.00
1.342
0.294
#NUM!
#NUM!
5.00
1.273
0.241
#NUM!
#NUMI
6.00
1.238
0.213
#NUM!
#NUM!
7.00
1.212
0.192
#NUM!
#NUM!
8.00
1.188
0.172
#NUMI
#NUM!
9.00
1.165
0.153
#NUM!
#NUMI
10.00
1.143
0.134
#NUMI
#NUM!
11.00
1.122
0.115
#NUM!
12.00
1.101
0.096
#NUMI
13.00
1.080
0.077
#NUMI
16.00
1.020
0.020
#NUMI
24.00
0.876
-0.132
#NUMI
Pharmacokinetic Parameters
Parameter
Value
Alpha
B
Beta
Units
ng/ml
hr-1
ng/ml
hr-1
CO
ng/ml
H.C
AUC
ng x hr/ml
Vc
Vbeta
Vss
C
L/hr
TK (alpha)
hr
TX (beta)
days
5+
F3
F4
F5
0+
F6
F7
%
6
95
14
#3
29
&
t
F8
F9
FW
EW
Linuron, a derivative of urea, is used as an herbicide. Linuron serum levels were measured in 4Kg
rabbits following a bolus IV injection of 10mg/kg.
Time (minutes)
Serum Linuron Levels (ug/ml)
following IV dose
10
15.48
20
8.60
30
5.90
45
3.78
60
2.42
90
1.49
120
0.93
180
0.60
240
0.41
300
0.29
360
0.22
Analyze this data and perform the necessary calculations to determine the following pharmacokinetic
parameters from the IV data: (5 points per parameter, 24 parameters/variables ■ 120 points
possible). You do NOT need to submit graphs or data tables.
Give the terminal regression line equation and R or R² value:
Give the x axis (name and units, if any) of the terminal line:
Give the y axis (name and units, if any) of the terminal line:
Give the residual regression line equation and R or R² value:
Give the x axis (name and units, if any) of the residual line:
Give the y axis (name and units, if any) of the residual line:
Chapter 33 Solutions
Campbell Biology
Ch. 33.1 - Prob. 1CCCh. 33.1 - Prob. 2CCCh. 33.2 - Compare and contrast the polyp and medusa forms of...Ch. 33.2 - VISUAL SKILLS Use the cnidarian life cycle...Ch. 33.2 - MAKE CONNECTIONS Many new animal body plans...Ch. 33.3 - Prob. 1CCCh. 33.3 - Prob. 2CCCh. 33.3 - MAKE CONNECTIONS Explain how the molluscan foot...Ch. 33.4 - Prob. 1CCCh. 33.4 - Describe two adaptations that have enabled insects...
Ch. 33.4 - MAKE CONNECTIONS Historically, annelids and...Ch. 33.5 - Prob. 1CCCh. 33.5 - WHAT IF? The insect Drosophila melanogaster and...Ch. 33.5 - MAKE CONNECTIONS Describe how the features and...Ch. 33 - Lacking tissues and organs, how do soonges...Ch. 33 - Describe the cnidarian body plan and its two major...Ch. 33 - is the lophotrochozoan clade united by unique...Ch. 33 - Describe some ecological roles of nematodes and...Ch. 33 - You've read that echinoderms and chordates are...Ch. 33 - A land snail, a clam and an octopus all share...Ch. 33 - Prob. 2TYUCh. 33 - The water vascular system of echinoderms (A)...Ch. 33 - Prob. 4TYUCh. 33 - In Figure 33.2, which two main clades branch from...Ch. 33 - Prob. 6TYUCh. 33 - Evolution connection Interpret thf data Draw a...Ch. 33 - Prob. 8TYUCh. 33 - Prob. 9TYUCh. 33 - SYNTHESIZE YOUR KNOWLEDGE Colleclively, do these...
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