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Which of the following statements about B cells and T cells is TRUE?

What is TRUE about the blood in the vessels labelled A and B below?

Which statement about tissue and organ transplantation is TRUE?

Smallpox is a disease that was eradicated from the world in 1980.  During its vaccination campaign in the 1960s the World Health Organization ran out of resources to vaccinate people and there was uncontrolled spread of smallpox. Describe how low smallpox vaccination rates could lead to an uncontrolled outbreak of smallpox in a population.  Explain what is needed to prevent uncontrolled spread of a disease.

In the case of Henrietta Lacks, cells were derived from a tumor in a woman without her consent.  She and her family were never notified of their collection, and were never compensated for them. These cells, called HeLa cells, have been used by thousands of researchers to study biomedical questions and have led to many important discoveries and treatments for diseases.  This case upholds some of the pillars of medical ethics, but not all of them.  Which statement is TRUE?

Which of the following is TRUE of the regulation of heart rate?    

Which of the following is a good dietary source of both Vitamin C and calcium?

The figure below shows a model of cardiac output when a person’s [autonomic] nervous system is activated.  As you can see, not all organs are shown, thus percentages will not add to 100. Based on this model about [brain]L is going to the brain each minute while about [pulmonary]L is going to the pulmonary circuit each minute.  

BMI is a mathematical comparison of a person’s height and weight.  Which is a more appropriate use of BMI?

Which of the following statements about the fight or flight response is true?