The posterior lobe of the pituitary releases ________, which stimulates contractions of the uterus during labor.
A. prolactin
B. oxytocin
C. estrogen
D. growth hormone
E. luteinizing hormone
Answer: B
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The research team used their experiments to study the incorporation of labeled nucleotides into a culture of lymphocytes and found that the lymphocytes incorporated the labeled nucleotide at a significantly higher level after a pathogen was introduced
into the culture. They concluded that _____. A) the presence of the pathogen made the experiments too contaminated to trust the results B) their tissue culture methods needed to be relearned C) infection causes lymphocytes to divide more rapidly D) infection causes cell cultures in general to reproduce more rapidly E) infection causes lymphocyte cultures to skip some parts of the cell cycle
As long as your sample is large enough, you don't have to worry about using the sample standard deviation in place of the unknown population standard deviation in constructing a confidence interval because ________.
A. for low degrees of freedom, the t-distribution is similar to the standard normal distribution B. the sample standard deviation is an efficient estimator of the population standard deviation C. for all degrees of freedom, the t-distribution is bell-shaped D. for a large sample, the t-distribution is similar to the standard normal distribution
ALL of these respiratory pathogens require person-to-person propagation EXCEPT
a. Legionella pneumophila. b. Streptococcus spp. c. influenza virus. d. both Streptococcus spp. and influenza virus.
Amplification is an important characteristic of signal transduction pathways involving surface receptors. What is
amplification and how is it accomplished in the cell?
What will be an ideal response?