Teratogens are most damaging to organ systems if exposure to them occurs
A. early in pre-embryonic development.
B. when the organ systems are undergoing peak development in the embryo.
C. in the fetal period, after systems have formed but have not completed maturation.
B
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The strongest muscle contractions are normally achieved by ________.
A) increasing stimulus above the threshold B) increasing stimulus above the treppe stimulus C) increasing the stimulation up to the maximal stimulus D) recruiting small and medium muscle fibers
A patient with essential hypertension might have pressures of 200/120 mm Hg. This hypertensive state could result in all of the following changes except ________.
A) increased work of the left ventricle B) increased incidence of coronary artery disease C) increased damage to blood vessel endothelium D) decreased size of the heart muscle
A ration is divided into a 24 hours time frame
Indicate whether the statement is true or false
Which type of tissue covers surfaces and lines cavities?
A. Muscle B. Connective C. Epithelial D. Connective and muscle