Which of the following is something antibodies do not do?
A) Link antigen molecules together
B) Bind antigen molecules of two or more enemy cells and stick them together
C) Bind to enemy cells, thus changing their shape so their complement-binding sites are exposed
D) Neutralize antigens by binding to regions of an antigen that can be pathogenic
E) Differentiate into memory antibodies, which upon reexposure to the same pathogen would mount a quicker attack
E
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The vitamin that is a constituent of coenzyme FAD is
A) thiamine (B1). B) riboflavin (B2). C) niacin (nicotinic acid). D) folate (B9). E) cobalamin (B12).
Which of the following is not true of the enteric nervous system?
A. Neurons are embedded in the wall of the digestive tract. B. It innervates smooth muscles and glands. C. Some of the fibers arise in the brainstem. D. It regulates motility of the esophagus, stomach, and intestines. E. It has its own reflex arcs.
The percentage of erythrocytes in blood is known as the ________
A) hematocrit B) buffy coat C) hemoglobin D) plasma
The spinal reflex for micturition involves stretch receptors in the wall of the bladder that send messages about distension to sympathetic, parasympathetic, and motor neurons in the spinal cord
Indicate whether the statement is true or false.