Which of the following is a role of lymph nodes?
A. They return lymph to circulation.
B. They filter lymph.
C. They produce lymph.
D. They produce red blood cells.
Answer: B. They filter lymph.
Lymph nodes are rich with macrophages, B cells, and T cells; therefore, the lymph nodes are primed for activating the immune system. Structurally, lymph nodes have a capsule and medullary chords and sinuses that serve to filter lymph fluid.
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Contrast light and dark adaptation and include the role of the rods and cones.
What will be an ideal response?
Match the characteristic with the correct division of the nervous system.All axons are myelinated
A. Autonomic nervous system B. Somatic motor nervous system C. Both somatic and autonomic nervous systems D. Neither somatic nor autonomic nervous system
At the grocery store a cute, little curly-haired child is standing behind you in line. You turn around for a moment and she sticks her tongue out at you. Which tongue muscle did she use?
A) orbicularis oris B) stylohyoid C) genioglossus D) hyoglossus
Which part of a synovial joint may be reinforced by ligaments and tendons?
A. Articular capsule B. Synovial membrane C. Menisci and discs D. Articular cartilage