The heartbeat is initiated by the cells of the ________ node.
Fill in the blank(s) with the appropriate word(s).
SA
You might also like to view...
Which of the following structures contains otoliths (ear stones)?
a) macula of the saccule b) cupula of the crista c) tectorial membrane of the organ of Corti d) basilar membrane of the cochlear duct e) tympanic membrane
Bars frequently provide snacks for their drinkers to enjoy, either free or at a nominal charge. These snacks invariably contain large amounts of salt. Why would providing such munchies be advantageous to the bar's profits?
What will be an ideal response?
A fracture in the ________ can impair the lengthwise growth of bones in a child
A) epiphyseal plate B) osteoblasts C) periosteum D) medullary cavity E) articular cartilage
Skeletal muscle fibers
A. can contract but are not extensible or excitable. B. increase dramatically in number after birth. C. are found in the walls of the stomach. D. possess striations. E. do not require nerve innervation to contract.