During a primary humoral response to antigens all of the following occur except
A) B cells may differentiate into plasma cells immediately.
B) B cells may undergo several rounds of mitosis before producing plasma cells and memory cells.
C) antibody levels do not peak until 1 to 2 weeks after the initial exposure.
D) neutrophils invade the surrounding areas, releasing chemotactic substances.
E) the first immunoglobulins to appear in circulation are of the IgM type.
D
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Use Table 1.1 to graph the data appropriately. What can you CONCLUDE based on the new figure?
The primary motor cortex is located in the ________ lobe.
A. frontal B. parietal C. temporal D. occipital
Smooth muscle cells tend to be shorter but thicker than skeletal muscle cells
Indicate whether this statement is true or false.
Which of the choices below is not a function of the urinary system?
A) helps maintain homeostasis by controlling the composition, volume, and pressure of blood B) regulates blood glucose levels and produces hormones C) maintains blood osmolarity D) eliminates solid, undigested wastes and excretes carbon dioxide, water, salts, and heat