A woman brings her 4-year-old daughter to the pediatrician because of continuing problems with vomiting, constipation, and abdominal distension. Extensive examination results in a diagnosis of an aganglionic colon. The girl has a deficiency in which of the following neural cell types?
(A) Pseudounipolar sensory neurons
(B) Presynaptic sympathetic neurons
(C) Presynaptic parasympathetic neurons
(D) Postsynaptic sympathetic neurons
(E) Postsynaptic parasympathetic neurons
Answer: (E) Postsynaptic parasympathetic neurons
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Identify all of the bones that articulate at the ankle joint.
a. Fibula b. Metatarsals c. Calcaneous d. Talus e. Tibia
A chemical buffer system is a mixture in a solution of two chemical compounds that minimize pH changes when either an acid or a base is added to or removed from the solution
a. True b. False Indicate whether the statement is true or false
Chemicals other than antibodies secreted by lymphocytes are collectively known as
a. cytokines b. antigens c. opsonins d. complement factors e. pyrogens
The scrotum contains the testes and spermatic cords.
Answer the following statement true (T) or false (F)