Which of the following best describes the composition of the dermis?
A) Collagen and fibroblasts
B) Collagen and living keratinocytes
C) Collagen and dead keratinocytes
D) Elastic fibers and dendritic cells
E) Elastic fibers and melanocytes
A
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In these views of the trachea, what structure does number 2 indicate?
A. Tracheal cartilage B. Trachealis muscle C. Carina D. Anular ligament E. Pseudostratified ciliated columnar epithelium
The substance released at axon terminals to propagate a nervous impulse is called a(n) ________.
A) ion B) cholinesterase C) neurotransmitter D) biogenic amine
Which of the following ECG waves represents atrial repolarization?
a. P wave. b. QRS complex. c. T wave. d. atria don't repolarize e. the wave does not appear on an ECG because it occurs at the same time as the QRS complex
Hyperthyroidism can be treated by surgical removal of the thyroid gland or by intravenous injection of radioactive iodine.
Answer the following statement true (T) or false (F)