Vaccines work by ________
A) boosting innate immunity with cytokines
B) providing the necessary antibodies to fight infections
C) suppressing inflation to help speed healing
D) priming the adaptive immunity with a relatively harmless primary exposure
D
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Thirst is always a reliable indicator of body water need
Indicate whether the statement is true or false
Regarding its role as a neurotransmitter in the CNS, norepinephrine
A. is secreted by brainstem neurons in response to sensory stimulation. B. amplifies weak sensory signals and dampens strong ones so that more information can reach conscious levels. C. is important for maintaining directed attention. D. both "is secreted by brainstem neurons in response to sensory stimulation" and "is important for maintaining directed attention" are correct. E. All of the choices are correct.
Which of the following motions occurs primarily in the sagittal plane?
Which of the following motions occurs primarily in the sagittal plane?
Cardiac muscle cells
A. have smooth ER but no T tubules. B. form the heart valves. C. are maintained by an extensive capillary network. D. develop a significant oxygen debt during systole. E. do not contain actin and myosin like skeletal muscle cells.