Blood return to the heart through the veins is aided by
A. precapillary sphincters.
B. skeletal muscle and respiratory pumps.
C. a blood pressure difference from arteries to the capillaries.
D. All apply.
Answer: B
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Microfilaments do not
A) anchor the cytoskeleton to membrane proteins. B) help determine the consistency of cytoplasm. C) produce cell movement, with myosin. D) consist of the protein called actin. E) distribute chromosomes to opposite ends of a dividing cell.
The ________ ossicles are the three little bones in the middle ear
Fill in the blank(s) with correct word
The difference in electrical charge between two points:
A. is called the potential difference between those points. B. is called the diffusion potential between those points. C. is called the current, and is expressed in the units of millimoles. D. is the same for all ions.
Hair cells in the semicircular canals detect changes in the rate of angular motion of the head, while the same kinds of cells in the utricle and saccule detect changes in the head's rate of linear motion
Indicate whether the statement is true or false.