The fibrous sac that surrounds the heart and produces lubricant for heart contraction is the
A) myocardium.
B) pericardium.
C) endocardium.
D) epicardium.
E) reticulocardium.
B
You might also like to view...
The process of examining the genomes of animals and plants for useful genes is
A. gene prospecting. B. genetic engineering. C. phenotypic labeling. D. cloning.
Claytonia virginica is a woodland spring herb with flowers that vary from white to pale pink to bright pink. Slugs prefer to eat pink-flowering over white-flowering plants (due to chemical differences between the two), and plants experiencing severe
herbivory are more likely to die. The bees that pollinate this plant also prefer pink to white flowers, so that Claytonia with pink flowers have greater relative fruit set than Claytonia with white flowers. A researcher observes that the percentage of different flower colors remains stable in the study population from year to year. Given no other information, if the researcher removes all slugs from the study population, what do you expect to happen to the distribution of flower colors in the population over time? A) The percentage of pink flowers should increase over time. B) The percentage of white flowers should increase over time. C) The distribution of flower colors should not change. D) The distribution of flower colors should randomly fluctuate over time.
A normal tidal volume at rest is approximately ________ mL.
A) 100 B) 500 C) 5000 D) 1000 E) 10,000
The ____ gland stores and releases hormones produced by the hypothalamus
a. pancreas b. pineal c. pituitary d. thyroid e. parathyroid