Arteries ensure that blood constantly flows due to contraction of its smooth muscle layer
Indicate whether the statement is true or false
F
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Which statement is true regarding the action of an oligodendrocyte?
A. Each oligodendrocyte can form a myelin sheath around many axons simultaneously. B. An oligodendrocyte is responsible for forming part of the blood-brain barrier. C. Oligodendrocytes function only within the PNS. D. Each oligodendrocyte can wrap only a 1-mm portion of a single axon. E. A neurolemmocyte attacks pathogens.
Which organ stores sperm in insect reproductive systems?
a. ovariole b. ovipositor c. spermatophore d. germarium e. spermatheca
What does structure "D" represent on the diagram?
A. Arrector pili B. Hair follicle C. Epidermis and dermis D. Subcutaneous tissue E. Sebaceous gland
Which efferent motor neuron listed below is found in the reflex arc for defecation?
A. Spinal cord B. Stretch receptors in the rectal wall C. The rectal wall D. Motor neurons in the rectal wall