Macrophages
A) Secrete cytokines that initiate changes in other cells.
B) Are capable of ingesting neutrophils.
C) Are referred to as polymorphonuclear (PMN) cells.
D) A and B
Answer: D
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Which statement is true regarding secondary bronchi?
A. Each lung has two secondary bronchi. B. Each lung has four secondary bronchi. C. The left lung has two secondary bronchi and the right lung has three secondary bronchi. D. Each lung has three secondary bronchi. E. The right lung has two secondary bronchi and the left lung has three secondary bronchi.
In the lower respiratory tract, cartilage plates first appear at the
A) primary bronchi. B) secondary bronchi. C) tertiary bronchi. D) bronchioles. E) terminal bronchioles.
The upper teeth are embedded in the ________________________________
Fill in the blank(s) with correct word
Which of the following is NOT a function of the cerebrospinal fluid?
A) It forms a protective cushion around the brain and spinal cord. B) It helps nourish cells and maintain a stable ion balance in the central nervous system. C) It transports oxygen in white blood cells to neurons in the central nervous system. D) It transports waste back to the blood.