The reticular region of the dermis contains:
a. reticular connective tissue
b. dermal papilla
c. dense irregular connective tissue
d. Merkle cells
Answer: c. dense irregular connective tissue
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Sympathetic tone is continuous stimulation of smooth muscles in the walls of blood vessels, which results in partial constriction.
Answer the following statement true (T) or false (F)
Which of the following statements is true of the aortic bodies?
A. They are fetal structures that enable blood to bypass the lungs. B. They are innervated by the glossopharyngeal nerves. C. They are baroreceptors that supply information about blood pressure to the pons. D. They are chemoreceptors that supply information about blood chemistry to the medulla oblongata. E. They communicate with the pons by way of the vagus nerve.
Answer the following statements true (T) or false (F)
1. The end result of spermatogenesis is the formation of four cells, each containing 23 chromosomes. 2. As spermatogenesis takes place, each cell division moves the sperm closer to the exterior wall of the seminiferous tubule. 3. The epididymis is a tightly coiled tube attached to the testes and is about 6 feet long. 4. The epididymis makes up part of the spermatic cord. 5. Only about 1% of the primary follicles in the ovary develop into a mature follicle. 5.
One of the ways an inhibitory neurotransmitter can work is by causing the postsynaptic cell to
A. close chloride gates and prevent chloride exit. B. open sodium gates and allow sodium entry. C. open potassium gates and allow potassium exit. D. open both sodium and calcium gates.