Which of the following is not a mechanical barrier to pathogen invasion?
A. Mucus
B. Lysozyme in tears
C. Saliva
D. Interferon
Ans: D. Interferon
Anatomy & Physiology
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Which of the following might serve as a secondary pacemaker for the heart?
A) Both AV node and Purkinje fibers B) AV node C) Purkinje fibers D) Neither AV node nor Purkinje fibers
Anatomy & Physiology
Tactile sensation does NOT refer to:
A) crude touch. B) two-point discrimination. C) vibrations. D) light touch.
Anatomy & Physiology
Which of the following organs contains the control center for the feedback system that regulates blood pressure?
a) skin b) arteries c) brain d) heart e) pituitary gland
Anatomy & Physiology
The gallbladder ________.
A. breaks down red blood cells B. is attached to the pancreas C. produces bile D. produces secretin E. stores bile
Anatomy & Physiology