If a cell lacked centrioles, it probably would not be able to
A) move.
B) produce DNA.
C) divide.
D) synthesize proteins.
E) metabolize sugars.
C) divide.
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A horse with a puncture wound and no history of tetanus prophylaxis would receive tetanus toxoid
a. true b. false
The sinoatrial node is the heart's normal pacemaker because
a. it has the fastest natural rate of autorhythmicity. b. it has both sympathetic and parasympathetic innervation. c. it lies in the right atrium. d. activation of K+ channels occurs more rapidly in this region than elsewhere in the heart. e. none of these answers.
Predict what type of epithelial tissue would be found in an organ that needs to prevent water loss
A) Keratinized stratified squamous epithelium B) Nonkeratinized stratified squamous epithelium C) Stratified cuboidal epithelium D) Simple columnar epithelium
The individual with emphysema attempts to forcefully expire, which exacerbates (worsens) the problem of airway collapse, since now the floppy airways are excessively compressed by the tremendous rise in intrathoracic pressure. Additionally, a person with emphysema has a __________ residual volume due to not being able to expire the normal volume of air; this causes a(n) __________ in vital capacity.
A. smaller; decrease B. smaller; decrease C. larger; increase D. larger; decrease