Discuss why the difference in life expectancy for men and women has narrowed from eight years to five years since 1980.
What will be an ideal response?
Life expectancy for men in the United States is almost 5 years lower than for women. For years it had been assumed that the difference is based on biology, but we are learning that most likely the gender gap is related to lifestyle behaviors most commonly observed in men. Around 1980, the gender gap in life expectancy was almost 8 years. The decrease in the gender gap is thought to be due to the fact that women are increasingly taking on jobs, habits, and stressors of men including drinking and employment outside the home.
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Explain how professional antigen-presenting cells optimize antigen presentation to T cells despite the relatively limited capacity of any particular MHC molecule to bind different pathogen-derived peptides
What will be an ideal response?
Platelets are commonly called:
A) erythrocytes. B) leukocytes. C) lymphocytes. D) thrombocytes.
The central portion of the thoracic cavity, between the lungs, is a space called the:
A) mediastinum.
B) septum.
C) diaphragm.
D) bronchi.
Laughter is associated with a release of tension and an increase in the natural mood-lifters known as ____
a. morphine b. neuropeptides c. pheromones d. endorphins e. androgens