If an element is composed of atoms with an atomic number of 6 and a mass number of 14, then a non-isotopic atom of this element contains
A) 6 protons.
B) 8 electrons.
C) 8 neutrons.
D) 6 protons and 8 electrons.
E) 6 protons and 8 neurons.
E
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An athlete who is nearing the end of a 2-kilometer run would be expected to have both an increased mean arterial blood pressure and an increased total peripheral resistance.
Answer the following statement true (T) or false (F)
Examination of a tissue sample from the central nervous system reveals many darkly pigmented cells. This tissue probably came from the
A) nucleus gracilis. B) nucleus cuneatus. C) motor cortex. D) substantia nigra. E) cerebellar nucleus.
Shivering consists of rhythmic, oscillating skeletal muscle contractions that occur at a rapid rate of 10 to 20 per second
a. True b. False Indicate whether the statement is true or false
Why is ventricular fibrillation fatal?
A) Ventricular fibrillation is fatal because the ventricles quiver and do not relax long enough to be filled with blood by the atria. B) Ventricular fibrillation is fatal because the ventricles quiver and do not pump blood to the systemic circulation. C) Ventricular fibrillation is fatal because the ventricles do not relax long enough for the coronary vessels to fill with blood for the coronary tissue to receive oxygen and nutrients. D) Ventricular fibrillation is fatal because the heart is beating to an ectopic pacemaker and the rhythm is irregular. E) Ventricular fibrillation is fatal because the heart rate slows significantly and blood flow and pressure decreases.