Blood from the systemic circuit returns to the heart via the __________.
Fill in the blank(s) with the appropriate word(s).
venae cavae
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Cells of unknown function that are clustered together in concentric layers within the medullary region of the thymus are called ________.
Fill in the blank(s) with the appropriate word(s).
A ________ section divides a body or organ into right and left portions
A) transverse B) frontal C) sagittal D) coronal
In children, failure to attain normal height is a symptom of ________.
A. gigantism B. dwarfism C. type 2 diabetes D. Addison's disease
Each of these statements is true except one. Identify the exception.
A) Activation of ? receptors opens Na+ channels in the membrane. B) ?2 receptors are not innervated by sympathetic neurons, so are more sensitive to epinephrine, delivered via the blood. C) ?1 receptors respond equally well to both epinephrine and norepinephrine. D) Monoamine oxidase is the main enzyme responsible for the degradation of catecholamines.