The larynx, trachea, bronchi, and bronchioles all make up the
A) upper respiratory tract.
B) lower respiratory tract.
C) internal respiratory tract.
D) alveoli of the respiratory tract.
E) respiratory mucosa.
B
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Which of the following is a function of the glottis? A) moving air to and from the exchange surfaces B) production of sound C) protecting from dehydration by filtering water out of the air D) providing an extensive surface area for gas exchange E) All of the answers are correct.
A) moving air to and from the exchange surfaces B) production of sound C) protecting from dehydration by filtering water out of the air D) providing an extensive surface area for gas exchange E) All of the answers are correct.
Plasma accounts for ________ of total blood volume.
A. 75% B. 50% C. 55% D. 90%
A fast-adapting tactile receptor that monitors movements across the body surface is a
A) tactile (Merkel) disc. B) lamellar corpuscle. C) tactile (Meissner) corpuscle. D) Ruffini corpuscle. E) root hair plexus.
Which cells of the immune system are the primary targets the HIV virus?
a) B cells b) helper T cells c) cytotoxic T cells d) antigen-presenting cells e) all of these cells are affected by HIV