Acetylcholine binds to a GPCR on heart muscle, making the heart beat more slowly. The activated receptor stimulates a G protein, which opens a K+ channel in the plasma membrane. Which of the following would enhance this effect of the acetylcholine?

7.  Convert 8.5 g/cm3  to  kg/m3

9.  Convert 800 mm to meters

5.  Convert 6.4 gallons to liters

Which section of the graph represents the thermoneutral zone? 

A newly admitted patient diagnosed with schizophrenia is hypervigilant and constantly scans the environment. The patient states, “I saw two doctors talking in the hall. They were plotting to kill me.” The nurse may correctly assess this behavior as:

Below is a list of ecological studies. Select the ones that are “observational”, and not “manipulative experiments”.

Consider the photo below, which shows the canopy of coniferous and deciduous forest. Explain how a shift in forest composition from coniferous forest (e.g. spruce) to deciduous forest (aspen and birch) would be expected to affect the region’s temperature via albedo. Consider the effect in both the growing season (showing in picture) and during the winter.  

Examine the graph below carefully. Note the three regions labelled A, B, and C. The correct term for an animal that responds to environmental temperature variation in this way is .

Given sufficient levels of environmental heterogeneity, ectotherms can successfully regulate a constant body temperature.