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Browse through our recently updated questions and discussion topics.
Is it possible to clone humans using current technology?
Is it possible to clone humans using current technology?
First year university research paper
Cell Biology   nerdfolife   591   bio_man   12 years ago
Localized, mild type I hypersensitivity reactions can be treated with
Localized, mild type I hypersensitivity reactions can be treated with
Localized, mild type I hypersensitivity reactions can be treated with :

 What type(s) of cells are involved in type IV hypersensitivity reactions?  

Vaccination with which immunogen is generally most effective?
Cell Biology   garpo   1237   2   bio_man   12 years ago
Where should a dentist inject the lidocaine to block pain perception?
Where should a dentist inject the lidocaine to block pain perception?
Would this be a correct answer for this question? Inject lidocaine into the axons of the nociceptors
Anatomy and Physiology   ricky83ny   8996   4   12 years ago
I need help, ugh...anything would be great!
I need help, ugh...anything would be great!
77) Which of the following best describes the general arrangement of the efferent limb of the autonomic nervous system?
A) one neuron
B) two neurons in parallel
C) two neurons in series
D) three neurons in series
E) three neurons in parallel
Matching: For each of the following, indicate whether the property corresponds to graded potentials, action poten
Anatomy and Physiology   kmuhs   2671   3   12 years ago
how to write a report?
how to write a report?
I have  to write a report on a gene i picked using scientific papers. The problem is I am having trouble with the structure of the report. Any suggestions will be of great help.
Referencing Help   gzach369@yah   9808   9   how_mendel   12 years ago
Which of the following is an example of a bioenergy product?
Which of the following is an example of a bioenergy product?
Question 48 of 60   1.667 Points
Which of the following is an example of a bioenergy product?

 

   A. Ethanol.   
 

   B. Tidal power.   
 

   C. Wind power.   
 

   D. Uranium.   
 

   E. Solar power.   
Question 49 of 60   1.667 Points
Mae is working in a developing country predicting the environmental i
General Biology   Blah Blah   1063   duddy   12 years ago
A genetic profile of Devin showed that he carried a gene for asthma and a gene for muscular dystroph
A genetic profile of Devin showed that he carried a gene for asthma and a gene for muscular dystroph
Question 22 of 60   1.667 Points
A genetic profile of Devin showed that he carried a gene for asthma and a gene for muscular dystrophy, both on the same copy of chromosome 5. His other copy of chromosome 5 had healthy alleles, as did both copies of chromosome 5 in his wife. Their daughter inherited the gene for asthma but NOT the gene for muscular dystrophy. What is the most like
General Biology   anon44   739   bio_man   12 years ago
In the muscle stimulation lab, the muscle tested came from a...
In the muscle stimulation lab, the muscle tested came from a...
Question 58 of 60   1.667 Points
In skeletal muscle:

 

   A. the fewer the number of muscle fibers responding to a stimulus, the greater the strength of the contraction   
 

   B. the actual number of muscle fibers responding to a stimulus has no effect on the strength of the contraction   
 

   C. The greater the number of muscle fibe
General Biology   Blah Blah   837   bio_man   12 years ago
Physioex 28B (Activities 1-7)
Physioex 28B (Activities 1-7)
Does anyone have the answers to Phyioex 28b, Activities 1- 7. Have tried to conduct the experiments but time is too limited to complete all before online test today.

Thank you!!
Upper-Year Courses   envinsite   1674   bio_man   12 years ago
how do you think a decrease in blood pressure would affect filtration in the kid
how do you think a decrease in blood pressure would affect filtration in the kid
how do you think a decrease in blood pressure would affect filtration in the kid?
General Biology   jok3r21   722   bio_man   12 years ago
Physioex 8.0 Cat version Endrocrine system ex 28B
Physioex 8.0 Cat version Endrocrine system ex 28B
Need some help with Activity 1 - specifically to confirm which rat had highest met rate and why they differed.
Upper-Year Courses   envinsite   1191   bio_man   12 years ago
Gerome is studying survival and adaptation of a lizard species that reproduces p
Gerome is studying survival and adaptation of a lizard species that reproduces p
Question 38 of 60   1.667 Points
Gerome is studying survival and adaptation of a lizard species that reproduces parthenogenetically, producing females only. If significant climate change were to occur, what might be the prognosis for this species?

 

   A. The lack of a need for gametes would allow rapid reproduction.   
 

   B. The lack of a need
General Biology   Blah Blah   958   bio_man   12 years ago
If global warming were to reduce rainfall from 100 cm annually to 20 cm annually
If global warming were to reduce rainfall from 100 cm annually to 20 cm annually
Question 42 of 60   1.667 Points
Nicole is studying a pond weed with a population growth rate of 100 percent per year. It has taken twenty years for the pond weed to cover one half of a lake. How many more years will it take before the pond is completely covered?

 

   A. 15 years.   
 

   B. 10 years.   
 

   C. 5 years.   
 
General Biology   Blah Blah   1119   bio_man   12 years ago
Assume you are a biologist that is studying the effect of a new food additive on
Assume you are a biologist that is studying the effect of a new food additive on
Question 56 of 60   1.667 Points
The forelimbs of a frog are located:

 

   A. along the dorsal ridges.   
 

   B. along the ventral midline.   
 

   C. toward the anterior end.    
 

   D. toward the posterior end.   
Question 57 of 60   1.667 Points
Assume you are a biologist that is studying the effect of a new food
General Biology   Blah Blah   960   bio_man   12 years ago
If you were a travel agent with clients who wanted an ecotour to see bison and prairies dogs...
If you were a travel agent with clients who wanted an ecotour to see bison and prairies dogs...
Question 44 of 60   1.667 Points
If you wished to make a documentary film comparing American antelope to African antelope, which biomes would you target for filming?

 

   A. Savanna - temperate grassland.   
 

   B. Desert - savanna.   
 

   C. Taiga - desert.   
 

   D. Temperate deciduous forest - savanna.   
 
General Biology   Blah Blah   1099   bio_man   12 years ago
Claire was experimenting with the effects of ultraviolet light on frogs.
Claire was experimenting with the effects of ultraviolet light on frogs.
Question 34 of 60   1.667 Points
Claire was experimenting with the effects of ultraviolet light on frogs. If she wished to darken the skin of the frogs, what might she inject them with?

 

   A. Oxytocin.   
 

   B. Melanocyte-stimulating hormone.   
 

   C. Prolactin.   
 

   D. Melatonin.   
 

   E. Follicle-st
General Biology   Blah Blah   1168   bio_man   12 years ago
What laboratory test results would suggest a possible cause?
What laboratory test results would suggest a possible cause?
Question 32 of 60   1.667 Points
Ami has severe osteoporosis. What laboratory test results would suggest a possible cause?

 

   A. Low glucocorticoid level.   
 

   B. Inactive osteoclasts.   
 

   C. Calcitonin excess.   
 

   D. Low parathyroid hormone level.   
 

   E. Calcitonin deficiency   
Question 33
General Biology   Blah Blah   932   bio_man   12 years ago
The cells that interact with antigen-specific B cells and stimulate them to make
The cells that interact with antigen-specific B cells and stimulate them to make
The cells that interact with antigen-specific B cells and stimulate them to make antibodies are called?


What type of molecules present peptide antigens derived from engulfed extracellular pathogens?

Which host cells express MHC II proteins

 T cells interact with the peptide-MHC complex using

 Antibody-mediated immunity controls the
Cell Biology   garpo   1691   bio_man   12 years ago
The above events in the sequence in which they occur during the reproductive
The above events in the sequence in which they occur during the reproductive
1) Pre-embryo release hCG, which maintains hormone levels
2) A hormones signals the follicle to rupture
3) Blastocyst is implanted
4) The egg is fertilized to form a zygote
 Neutral Face
Genetics and Developmental Biology   kasy110   3490   5   bio_man   12 years ago
Which of the following is NOT a factor involved in the determination of resting
Which of the following is NOT a factor involved in the determination of resting
Which of the following is NOT a factor involved in the determination of resting membrane potential?
a. concentration of sodium
b. concentration of potassium
c. pressence of sodium channels
d. presence of potassium channels
e. concentration of sodium receptors
Anatomy and Physiology   kmuhs   1652   bio_man   12 years ago
Compare the urine volume in your baseline data with the urine volume as you incr
Compare the urine volume in your baseline data with the urine volume as you incr
ACTIVITY 2:  The Effect of Pressure on Glomerular Filtration

15.   Compare the urine volume in your baseline data with the urine volume as you increased the systemic blood pressure.

1.   When the one-way valve between the collecting duct and the urinary bladder was closed, what happened to the filtrate pressure in Bowman’s capsule (was not directly measured) a
Anatomy and Physiology   Vickys05   4709   bio_man   12 years ago
Mid-term HELP. A few questions left
Mid-term HELP. A few questions left
Marcy is a meteorologist concerned that rainfall may decline in a country undergoing extentsive deforestation.  Why might rainfall decline?
A. Lack of nitrogen fixation
B. Depletion of aquifers
C. Pollution of ground water
D. Excessive nitrogen fixation
E. Reduced traspiration

If you encountered a seafloor that you suspected was composed larg
General Biology   lausengc   1998   4   12 years ago
The basis of neural integration is:
The basis of neural integration is:
Can some one please help me sith this question:
The basis of neural integration is:
A. Addition of postsynaptic potentials overlapping in time and space.  
B. Command signals from central pattern generator.
C. Spontaneous activity in pacemaker neurons.
D. The area under the curve of postsynaptic potentials
     overlapping in time and s
Anatomy and Physiology   fatima2005   3528   2   mo.am   12 years ago
PhysioEx 9.0.
PhysioEx 9.0.
I am working with the new PhysioEx book. I have been looking to see if this has been posted yet, and so far I have found nothing. So if this is already up I am sorry for the repost! I am working on the PhysioEx 9.0 Exercise 1 Activity 1 through 5 and I could really use some help!

ACTIVITY 1:  Simulating Dialysis (Simple Diffusion)

1. The molecular weight o
Anatomy and Physiology   c.c.morgan   1630   2   greenis7   12 years ago
Physioex 9.0 exercise 9
Physioex 9.0 exercise 9
26.   If a person is very dehydrated, compared to normal, the urine volume will ______ and the concentration of the urine will ________.
a.   increase;  increase
b.   increase;  decrease         
c.   decrease;  increase
d.   decrease;  decrease

31.   Is most of the tubule filtrate reabsorbed into the blood stream (the body) or excreted in urine?&nbs
Anatomy and Physiology   Vickys05   1360   shawnep99   12 years ago
Emma’s doctor told her that she had candidiasis, and infection of the vagina.
Emma’s doctor told her that she had candidiasis, and infection of the vagina.
Emma’s doctor told her that she had candidiasis, and infection of the vagina.
The cause of his illness likely belonged to which of the following groups of organisms?

 

   A. Dinoflagellates.   
 

   B. Flagellates.   
 

   C. Sac fungi   
 

   D. Club fungi.   
 

   E. Ciliates.   


Berkeley was
General Biology   Mira8642   639   shawnep99   12 years ago
Help with application 1
Help with application 1
what occurs from the moment Steve decides to swing to actually completing the act? Detail the steps needed for the thought to go from the first neuron to the second, and then from the last neuron to one of the muscles you identified in part 1? (shoulders, arm, wrist, and hand)

Which nerve directly innervates the muscle you chose in part 2d?

Explain the sliding
Anatomy and Physiology   Shannon3   1334   2   12 years ago
In telophase does the chromatin of each chromosome begin to coil?
In telophase does the chromatin of each chromosome begin to coil?
1)In the anaphase the chromatids BEGIN to move towards opposite ends.
but in telophase the chromatids are are HAVE FINISHED MOVING towards opposite ends.

the reason I am asking this because in my notes I saw "opposite poles" for each of these phases, so I looked into it and I was curious.


2) in telophase does the chromatin of each chromosom
Cell Biology   reyrey389   918   2   Hakatari   12 years ago
Virus and autophagy
Virus and autophagy
Hi there,

One of my question for an assignment is that viruses initate a process that is similar to autophagy. Describe the process.

I'm a little lost here. I know that a virus inserts their genetic material to the host cell which may be incorporated into the host DNA and that autophagy is the fusion of a lysosome and an autophagosome to digest the cell�
Cell Biology   cookiemonster1   1238   2   duddy   12 years ago
Starting at the renal corpuscle, list the components of the renal tubule as they
Starting at the renal corpuscle, list the components of the renal tubule as they
6.   Starting at the renal corpuscle, list the components of the renal tubule as they are encountered by filtrate.

22.   List the several “mechanisms” you have explored that change the GFR.  How does each of them specifically alter the GFR?

31.   Is most of the tubule filtrate reabsorbed into the blood stream (the body) or excreted in urine?  Explain.
Anatomy and Physiology   Vickys05   17952   2   duddy   12 years ago
Describe and explain what happened to the glomerular capillary pressure and GFR
Describe and explain what happened to the glomerular capillary pressure and GFR
Activity 3 Renal Response to Altered Blood Pressure

19.   Describe and explain what happened to the glomerular capillary pressure and GFR when both arteriole radii changes were implemented simultaneously with the low blood pressure condition.
20.   Which arteriole radius adjustment was more effective at compensating for the effect of low blood pressure on the GFR?
Anatomy and Physiology   Vickys05   3560   duddy   12 years ago
I need help with application assignment 1,
I need help with application assignment 1,
muscles,joints and bones anatomy
a. which bones of the body are used to go from the anatomical positon to holding th golf club in front of her wit both hands as seen in the picture above?
Anatomy and Physiology   jchild2046   1879   2   12 years ago
Explain why altering vessel diameter would have a greater effect on blood flow t
Explain why altering vessel diameter would have a greater effect on blood flow t
Explain why altering vessel diameter would have a greater effect on blood flow than would changing hydrostatic blood pressure
Anatomy and Physiology   missnorcal   1401   robertling   12 years ago
What is the principal determinant for the release of aldosterone from the adrena
What is the principal determinant for the release of aldosterone from the adrena
ACTIVITY 6:  The Effect of Hormones on Urine Formation

47.   What is the principal determinant for the release of aldosterone from the adrenal cortex?

49.   What is the principal determinant for the release of ADH from the posterior pituitary gland?
Does ADH favor the formation of dilute urine or of concentrated urine?  
Anatomy and Physiology   Vickys05   10404   duddy   12 years ago
I need help with a couple of questions, Physioex 8, Exercise 7
I need help with a couple of questions, Physioex 8, Exercise 7
I would appreciate help on these 2 problems, just to make sure I have got them right :-) Thanks in advance!

2. Explain how the respiratory and circulatory systems work together to distribute oxygen to, and remove carbon dioxide from,
the cells of the body.


1.the percentage of vital capacity exhaled during a 1-second period of the FVC test
2.the
Anatomy and Physiology   kweigl1   2822   4   bio_man   12 years ago
What types of transport are utilized during glucose reabsorption and where do th
What types of transport are utilized during glucose reabsorption and where do th
40.   What types of transport are utilized during glucose reabsorption and where do they occur?

47.   What is the principal determinant for the release of aldosterone from the adrenal cortex?

49.   What is the principal determinant for the release of ADH from the posterior pituitary gland?
Does ADH favor the formation of dilute urine or of concentrated urine? &
Anatomy and Physiology   Vickys05   8494   duddy   12 years ago
Identify the type of membrane potential (graded receptor potential or action pot
Identify the type of membrane potential (graded receptor potential or action pot
58.   Identify the type of membrane potential (graded receptor potential or action potential) that occurred at R1, R2, R3, and R4 when you applied a moderate stimulus.  (Compare/view the response to the stimulus.)
Anatomy and Physiology   ricky83ny   6060   2   12 years ago
Cell Notes
Cell Notes
I.   A Tour of the Cell
A.   All living organism have cell.
B.   Microscopes provide windows to the world of the cell.
1.   A light microscope is the first microscope and it works by passing visible light through a specimen.
2.   Then Electron microscope came that uses beam of light. It’s much powerful then the light microscope about small as 1nm can be seen. Then scanni
Free Notes   boing   968   12 years ago
Solutions Chemistry Vocabulary
Solutions Chemistry Vocabulary

1.   colligative property - a property of a solution that depends on the concentration of the solute particles; boiling point elevation, freezing point depression, and vapor pressure lowering are colligative properties.
2.   colloidal dispersion  - a heterogeneous system which is dispersed as particles in another substance
3.   dynamic equilibrium - an equilibrium in
Free Notes   boing   1837   12 years ago
Explain how you were able to achieve smooth contraction at a given force level.
Explain how you were able to achieve smooth contraction at a given force level.
Help! Duddy! This has been a life saver! But I was wondering you had the answers to this same activity but for numbers 7-18? My lab is due and I cannot get the simulation to work on my computer. I will without a doubt contribute if I get some help.
-what was the effect of increasing the frequency of simulation?
-Compare and contrast wave summation with recruitment. How a
Upper-Year Courses   mcy   2893   2   kh   12 years ago
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