A protein that helps to protect the body against viral infections is
A. complement.
B. interferon.
C. lysozyme.
D. histamine.
E. kinin.
B
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An ectopic pacemaker is an area of the myocardial conducting system, other than the atrioventricular node, that initiates cardiac depolarization.
Answer the following statement true (T) or false (F)
Which organelles contain powerful enzymes that take care of cleaning up intracellular debris and other waste?
A. Ribosomes B. Smooth endoplasmic reticula C. Mitochondria D. Lysosomes
You're studying long-term stress in foster children. One thing you find is that, among the children experiencing the most significant stress for the longest period of time is decreases in ________.
A. bone and muscle density B. circulating cortisol levels C. adrenal gland function D. blood glucose levels
Define spinal reflex
A) A spinal reflex is a slow, calculated response of the spinal cord following exposure to a single specific stimulus. B) A spinal reflex is a slow, calculated response of the spinal cord following repeated exposure to specific stimuli. C) A spinal reflex is a slow, calculated action involving input from the brain triggered by specific stimuli. D) A spinal reflex is an automatic response to a stimulus that is controlled in the spinal cord and can function without input from the brain. E) A spinal reflex is when sensory inputs are sent quickly by the spinal cord to the brain for analysis before any response occurs.