The vasomotor center
A. sends low frequency action potentials to blood vessels to maintain tone.
B. regulates the expansion of elastic arteries.
C. increases the strength of heart muscle contraction under low O2 conditions.
D. controls the contraction and relaxation of precapillary sphincter muscles.
Answer: A
You might also like to view...
________ centers receive information from many association areas and direct extremely complex motor activities such as speech
A) Frontal B) Integrative C) Communication D) Terminal E) Vocal
During skin repair, most of the scab consists of an insoluble network of ________, a protein that forms from blood proteins during the clotting response.
A) keratin B) dermicidin C) melanin D) collagen E) fibrin
What is the blind spot in the eye?
A) where more cones than rods are found B) where the optic nerve leaves the eye C) where the macula lutea is found D) where only rods occur
After contraction has occurred, the Ca2+ are
A. returned to the sarcolemma. B. secreted by the Golgi apparatus to the outside of the cell. C. destroyed by cholinesterase. D. chemically bound to the cross bridges. E. released from troponin.