Although they are not a site of lymphocyte formation, ________ lymphatic structures provide sites where immune responses are initiated.

A. secondary
B. hemopoietic
C. red marrow
D. primary


Answer: A

Anatomy & Physiology

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The specific source of antibodies is the _____.

A) B cell B) T cell C) macrophage D) plasma cell

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Which reproductive accessory organ serves as the birth canal and receives semen during intercourse?

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What is the main reason a patient with Parkinson disease cannot be treated with dopamine?

A. Acetylcholine is the main neurotransmitter that is deficient. B. Injecting dopamine only makes the substantia nigra down-regulate its own production of dopamine. C. Dopamine is highly addictive, creating a dependence in the patient that is worse than Parkinson disease. D. Dopamine cannot cross the blood-brain barrier, and it has too many systemic side effects. E. Dopamine is a protein that is digested in the stomach before it can enter a person's circulation.

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