By definition, an infection results from a parasitic relationship between a microbe and its host.  That is, harm is being done to the host. Inapparent infection (also called subclinical, or asymptomatic infection) does not result in overt disease.

How is it possible for an infection not to result in overt disease?

For the observations that meets the qualifications of experimental theories answer the following questions.

What would be your experimental approach?

What are the dependent and independent variables?

What are your controls - both positive and negative?

How will you collect your data?

How will you present your data (charts, graphs, types)?

How will you analyze your data?

Observations

A plant grows three inches faster per day when placed on a window sill than it does when placed on a on a coffee table in the middle of the living room.

The teller at the bank with brown hair and brown eyes is taller than the other tellers.

When Sally eats healthy foods, her blood pressure is 10 points lower than when she eats fatty foods.

The Italian restaurant across the street closes at 9 pm but the one two blocks away closes at 10 pm.

For the past two days, the clouds have come out at 3 pm and it has started raining at 3:15 pm.

George did not sleep at all the night following the start of daylight savings.

You are a graduate student studying an inducible transcription factor called X. You make a cellular lysate and carry out a series of centrifugation steps at increasing speeds to localize X. You find that prior to induction, X is the supernatant following a fourth, very high speed ultracentrifugation step; however, after induction it is located in the pellet after only one relatively low speed ultracentrifugation step. What might this tell you about how X is regulated? What other techniques might you carry out to confirm your results?

In fall, the leaves of trees transition from green to an array of reds, oranges, and yellows. How will this change impact photosynthesis? Be sure to mention the effect on the light reactions and the Calvin cycle.

Black fur color is dominant to white fur color and non-webbed toes are dominant to webbed toes. a dog with white fur and web toes is mated with a dog homozygous dominant for both black fur and non-webbed toes. Draw the resulting Punnett square from this cross. What are the genotypic and phenotypic ratios of their offspring.

James got into a car accident. When the ambulance arrived, James was sitting on the flood next to his car with blood covering him. His car was hit a truck who came wrong way and hit face-to-face. James looks dazed, and as the paramedics approach he says with a mixture of panic and relief, “I am covered with blood!” James is only semi-lucid as he babbles on about pushing out the broken glass in his car window. The paramedic reports quickly that the patient is bleeding from multiple right-arm cuts and especially deep laceration on the right upper arm. The paramedic stopped the bleeding and move him quickly to the ambulance. James systolic blood pressure is 80 mm Hg (low), diastolic is not audible (too low to hear). His heart rate is 122 bpm (very rapid), and skin is pale and clammy, indicating peripheral vasoconstriction (narrowing of his blood vessels, particularly in the skin) and circulatory shock-like signs. On the way to the hospital, a paramedic begins transfusing normal saline solution (NSS; water with some NaCl, similar to body fluids, given directly into his vein).

Up on their arrival to the hospital, a hematocrit HCT was ordered by Dr. Smith and it is low but normal. Several vials of James’s blood are also sent to the lab for blood tests and typing. Two liters of NSS are transfused over the next hour while the ED physician sutures his deepest, right-upper-arm laceration. Despite no further bleeding since the paramedics treated him at the scene, James had another HCT tested one hour after the original HCT, drops to below normal. Dr. Smith didn’t order a blood transfusion though. Aside from his present health problem, James is otherwise healthy. He is admitted to the hospital for overnight observation.

Hematocrit is the percentage of total blood volume that is comprised of RBCs. Calculate James HCT if PCV for the RBCs is 1.25ml and plasma volume is 3.75 ml

What does the model of collaborative research with developing countries imply about licensing genetic versions of patented drugs for poor areas with HIV, malaria, and tuberculosis?

how is the glycolcalyx of blood vessels affected by hyperglycemia & what does this have to do with diabetes?

describe the body's referred order of nutrients breackdown.

What ion contributes most to the resting membrane potential and why?

What is meant by analog and digital modes of neuronal activity?

Is an action potential necessary for release of neurotransmitter? Why or why not?

Describe Surface-Enhanced Laser Desorption Ionization - Time of Flight (SELDI-TOF) mass spectrometry as an approach for the rapid detection and quantification of proteins.

Outline how protein folding occurs and how this process is reversed to facilitate digestion with proteases such as trypsin prior to mass spectrometry analysis.

Discuss how proteins are identified by Peptide Mass Fingerprinting (PMF) using Matrix Assisted Laser Desorption Ionization Time-of-Flight (MALDITOF) mass spectrometry.

Trace the formation of T cells and B cells from stem cells.