This type of mechanoreceptor is found in the lips, nipples, and fingertips and helps us to precisely determine contact with something else
A) free nerve endings B) Pacinian corpuscles
C) Meissner's corpuscles D) hair root plexus
Answer: C
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Which of the following statements about single nucleotide polymorphisms (SNPs) is correct? (Choose all that apply)
A. For some disorders, multiple SNPs plus environmental factors are necessary in order for the disorder to present itself. B. Genotyping SNPs instead of sequencing entire genomes allows researchers to find correlations between genetic risk factors and disease. C. SNPs are useful in the diagnosis of a disease but not in the prediction of an individual's risk for acquiring that disease. D. Individuals who are heterozygous for the S allele in the ?-globin gene are more likely to develop sickle-cell anemia than individuals who are homozygous for the S allele in the ?- globin gene. E. The presence of an SNP in an organism's genome when compared to the "standard" genome of that organism means that a disease condition will develop.
Membrane potential cannot exceed +30 mV, because when it reaches this level, gated sodium channels close, and:
a. potassium only moves across the cell membrane via passive transport proteins b. sodium only moves across the cell membrane via passive transport proteins c. potassium gated channels open d. potassium flows into the cytoplasm e. the action potential is not propagated
Studies done in the 1960s suggested that individuals with the XYY condition were prone to criminal behavior. What conclusions currently seem appropriate concerning this chromosomal condition?
What will be an ideal response?
What substance would you expect to accumulate in soil as a result of increased acid precipitation?
A. Nitrogen B. Oxygen C. Ammonia D. Calcium