Low levels of ___ can have dire consequences on the functioning of neurons because of its role in membrane repolarization
A.
sodium ions
B.
potassium ions
C.
chloride ions
D.
hydrogen ions
B
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What is the correct order of structures through which air flows into the respiratory tract?
A. Larynx; pharynx; trachea; bronchioles; bronchi B. Pharynx; larynx; trachea; bronchi; bronchioles C. Larynx; pharynx; trachea; bronchi; bronchioles D. Larynx; pharynx; bronchi; trachea; bronchioles E. Pharynx; trachea; larynx; bronchi; bronchioles
Which of the following is true of the coronary arteries?
A) They branch off the pulmonary veins. B) They open and close in pulsation with the contraction and relaxation of the heart ventricles. C) Together they supply part of the heart muscle with oxygen. D) They originate at the base of the aorta and are the first branches off this vessel. E) None of the answers are correct.
Oligodendrocytes form myelin around the axons of the CNS
Indicate whether the statement is true or false
Without the presence of ________, sensations of pain in a somatic location that are not due to nociceptor stimulation in that region may not be experienced.
A. third-order neurons B. interneurons C. receptive fields D. mechanoreceptors