The parenchyma of the lung is ()
A. bronchial tree and connected alveoli
B. pulmonary arteries and veins and their branches
C. lymphatic vessels
D. nerves
E. connective tissue
查看答案
All of the following are features of the trachea EXCEPT ()
A. an elastic wall
B. cartilage rings completely encircle the wall
C. submucosal glands
D. presence of lymphoid tissue in the lamina propria
E. lined by pseudostratified columnar epithelium
Which one is the most numerous of leukocytes in human blood ? ()
A. Neutrophils
B. Eosinophils
C. Basophils
D. lymphocytes
E. Monocytes
In peripheral nerve fibers, the sheath cell is ()
Astrocytes
B. Oligodendrocytes
C. Satellite cells
D. Ependymal cells
E. Schwann cells
The special structure at the junction of two adjacent cells in cardiac muscle is ()
A. tight junction
B. intermediate junction
C. Desmosome
D. gap junction
E. intercalated disc
微信支付 
支付宝支付