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Human Biology

Better understanding of AIDS

What is the method for attachment for HIV (key receptor)? What is the principal target cell? Why hasn't a vaccine been developed?

Carbonaceous oxides

Some one mentioned carbonaceous oxides. Most of us would say carbon dioxide but the way you said it sounded more erudite. Industry, vehicles, and power plants put out a lot of these oxides which form carbonic acid when it combines with water. It's a weak acid when compared to sulfuric acid but it is produced in huge quantities

American Bison

In 1800 the estimated American Bison population was ten million, with a range over much of what is now the United States and lower Canada. By 1900 there were fewer than 1000 left, largely due to human actions. We drove the passenger pigeon to extinction, nearly killed off the California Condor. The Bald Eagle was nearly wiped

2 questions about clinical uses of nitrates such as isosorbide, beta antagonists in my0cardial infarction interpretation of blood gas data in relation to hypoxemia, respiratory control.

I need help with the two following questions in some detail. Need about two sides for each question. Also not all the patient data may be relevant to answer the questions, as there were other questions that came with the patient data, I may also need further explanation and help with those questions which are in relation to the

Enzymatic Reactions

In the presence of the enzyme alcohol dehydrogenase, the rate of reduction of acetaldehyde to ethanol increases as you increase the concentration of the substrate, acetaldehyde. Eventually the rate of the reaction reaches a maximum, where further increases in the concentration of the substrate has no affect on the reaction rate.


Can you explain to me the homeostatic nature of skin repair and how stress or poor nutrition affect the skin's ability to heal a wound?

Blood Test Results

Subject A is 19 year old student, 1.72 m tall and weighs 53kg. Subject A has been suffering from severe diarrhoea, stomach cramps, flatulence, bloating and stomach pain. He has been suffering from tiredness and generally feeling run down. Subject A is non drinker, non smoker, often skips breakfast but always has cooked m

Concept map on metabolism

Create a concept map using the below words. Provide a summary of your map, including how the words are related to each other and the overall concept. Hexokinase Glucose Glycolysis Krebs cycle Electron Transport Chain Pyruvic acid Acetyl - CoA Fermentation Lactic acid Ethanol Cytochrome oxidase ATP NADH


Describe the basis and uses of biofeedback training.

ANS fibers

Which ANS fibers release acetylcholine? Which release norepinephrine?

Animal Behavior - Reproductive strategies

Outline the theoretical basis for the typical female reproductive strategy. Outline the theoretical basis for the typical male reproductive strategy Sometimes the typical reproductive strategy is reversed. Give an example. Include what is usually different about the reproductive process in those species that results in thi

Dilution Series

A culture was determined to have 5.4 x 10^6 CFU/ml. Design a stepwise protocol to determine this number. For practice use different volumes of diluent and diluate.

MIC Calculation & Dilution series

The MIC of penicillin for Staphylococcus epidermis was determined to be in tube #5. The starting concentration was 1000g/ml in tube #1 and a 5-fold dilution was performed. What is the MIC? Show how you would do the dilution series?

Osmolar clearance

A 35-year-old female complains to her doctor that she is suffering from frequent urination. Her resting blood pressure and heart rate are 120/80 and 72, respectively. Her plasma creatinine is 0.85 mg/dl, urine flow is 5 ml/min, and urine osmolarity is 190 mOsm/l. Her plasma osmolarity is 290 mOsm/l. Calculate her osmolar clea

MHC uniqueness of individuals

Find the correct answer: The uniqueness of an individual is defined in part by the a. Type of antibodies produced by that individual b. Antigens to which the individual can respond c. Ability to produce T cells after passage through the thymus d. MHC proteins on the surfaces of the individual's cells.

Neurobiology questions

1. Two types of GABA receptors have been identified. The GABA(a) receptor is an ion channel permeable to CL-; and the GABA(b) receptor is a G-protein-couple receptor (activates a second messenger cascadein the postsynaptic cell) which causes K+ selective channels to open. What effect would the activation of GABA(b) receptors hav

Volume & Concentration Problem is asssessed.

I have 100mls of an antibiotic stock solution at a concentration of 6mg/ml. I would like a final volume of 10mls of the antibiotic at a concentration of 1.5mg/ml. How much of the stock solution do I need to obtain this?