The spinal cord is part of the central nervous system.
Answer the following statement true (T) or false (F)
True
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Autonomic nervous system fibers are involved in all of the following except __________.
A. changing the diameter of the pupil B. adjusting heart rate and force C. altering salivary mucus secretion D. regulating gastrointestinal motility E. maintaining tonicity of the muscles of the neck
What type of receptors do norepinephrine and epinephrine bind in the heart?
A. Muscarinic B. ?1-adrenergic C. Nicotinic D. ?-adrenergic
The figure illustrates keratinization in the epidermis. What layer of the epidermis is "D"?
A. stratum granulosum B. stratum corneum C. stratum lucidum D. stratum spinosum E. stratum basale
When the embryonic mass of cells develops an internal cavity, the mass of cells is called a(n)
A. zygote. B. morula. C. blastocyst. D. embryonic disc. E. trophoblast.