________ ribosomes are responsible for the synthesis of proteins that remain within the cell.
Fill in the blank(s) with the appropriate word(s).
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The tympanic membrane vibrates to frequencies between
A) 2,000-3,000 Hz. B) 20-2,000 Hz. C) 2-200 Hz. D) 200-200,000 Hz. E) 20-20,000 Hz.
The stimulus for secretion of atrial natriuretic hormone is increased
A. blood osmolality. B. aldosterone production. C. blood pressure in atria of heart. D. blood pressure in kidney's afferent arterioles. E. blood pressure in the ventricles of the heart.
The ligamentum teres is the remnant of the fetal ductus venosus.
Answer the following statement true (T) or false (F)
What is the reason why we must breathe oxygen?
Oxygen is broken down to yield energy. Oxygen allows us to get more energy (in the form of ATP) out of the food molecules we break down for energy. Oxygen stimulates enzyme activity. Oxygen is the chemical detected by chemoreceptors that keeps us breathing.