What is a major function of the endocrine system?
A) The endocrine system releases hormones into the bloodstream to reach receptors on target cells.
B) The endocrine system communicates directly with target cells through the use of neurotransmitters.
C) The endocrine system secretes products into ducts that lead to body surfaces or cavities.
D) The endocrine system produces immediate, short-lasting effects.
Answer: A
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The following structures of the mammalian nervous system, from posterior to anterior are laid out in the following order:
A) Spinal cord, medulla oblongata, pons, cerebellum. B) Spinal cord, pons, cerebellum, medulla oblongata. C) Medulla oblongata, spinal cord, cerebellum, pons. D) Pons, cerebellum, spinal cord, medulla oblongata.
Sickle cell disease is caused by
A) a lack of intrinsic factor. B) an excess of hemoglobin. C) a mutation. D) a lack of dietary iron.
Which of the following bones is paired?
A. Mandible B. Vomer C. Sphenoid D. Occipital E. Temporal
Erythroblastosis fetalis can develop between an Rh ____ mother and Rh ____ fetus
a. negative; negative b. neutral; negative c. negative; positive d. positive; negative e. positive; positive