In a resting potential, an example of a cation that is more abundant as a solute in the cytosol of a neuron than it is in the interstitial fluid outside the neuron is _____
A) Cl-
B) Ca++
C) Na+
D) K+
D
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Mutation is a source of new genetic variation. New genes can only be introduced into the population when individuals reproduce. Considering this, would you expect more variation in a population of mice or elephants, over the same time period, assuming that the populations were the same size? Explain
What will be an ideal response?
The structure of phospholipids includes a water-soluble phosphate group and water-insoluble fatty acid tails.
a. true b. false
Large, multinucleate cells that break down bone are called:a
osteoblasts. b. chondrocytes. c. bone stem cells. d. chondroblasts. e. osteoclasts.
Which of the following statements best explains why people with Hodgkin's disease often show signs of immunodeficiency?
A) The Hodgkin's disease virus infects and destroys B cells. B) Hodgkin's disease involves the deposition of immune complexes in the kidneys. C) Hodgkin's disease is a type of cancer that affects lymphocytes. D) Hodgkin's disease occurs when an immune response elicited by streptococcal bacteria kills normal heart cells as well.