Nails are hard derivatives formed from the stratum ________ of the epidermis.
A. lucidum
B. corneum
C. spinosum
D. basale
E. granulosum
Answer: B
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Nerve plexuses are networks of interweaving posterior rami of spinal nerves.
Answer the following statement true (T) or false (F)
________ increases the intensity of uterine contractions.
A. Oxytocin B. ADH C. Pituitary hormone D. Melatonin
Once an SA nodal cell reaches threshold, the depolarization phase occurs during which
A. potassium comes in through fast voltage-gated channels. B. calcium comes in through fast voltage-gated channels. C. potassium moves out through fast voltage-gated channels. D. sodium moves out through slow voltage-gated channels. E. calcium moves out through slow voltage-gated channels.
What does the regeneration tube of a peripheral nerve fiber consist of?
A. The axolemma and neurilemma B. The neurilemma and endoneurium C. The myelin sheath and neurilemma D. Schwann cells and astrocytes E. Satellite cells and oligodendrocytes