Refer to Figure 42-2. The neuron labeled 3 is:
a. an interneuron in the gray mater of the cord.
b. an interneuron in the white mater of the cord.
c. a sensory neuron in the gray mater of the cord.
d. a sensory neuron in the white mater of the cord.
e. a motor neuron in the gray mater of the co
A
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The group of bacteria that lack rigid cell walls and take on irregular shapes is:
A) chlamydias. B) mycobacteria. C) mycoplasmas. D) rickettsias.
Your job is to classify a newly discovered animal species. Your initial studies reveal that your specimen has tissues, organs, a head, and a coelom; has no segmentation; and has bilateral symmetry. To what phylum does this animal belong?
A) Cnidaria B) Mollusca C) Annelida D) Platyhelminthes E) Porifera
A reproductive hormone that is secreted directly from a structure in the brain is _____
A) estradiol B) progesterone C) follicle-stimulating hormone (FSH) D) gonadotropin-releasing hormone (GnRH)
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A) mucous membranes of the respiratory tract. B) mucous membranes of the gastrointestinal tract. C) skin. D) parenteral route. E) All of these portals are used equally.