Chordae tendineae:a
hold the AV valves in place.
b. contract when the heart contracts.
c. are one part of the conductance system of the heart.
d. regulate blood flow into the ventricles.
e. are stretched during ventricular systole
A
You might also like to view...
The phylogeny below represents a hypothesis for the evolutionary relationships among major groups of plants. If it is correct, in what order should we predict to find the fossils of these groups, in order from oldest to youngest?
A. flower group, conifer group, ferns, moss group B. conifer group, ferns, moss group, flower group C. ferns, moss group, conifer group, flower group D. moss group, ferns, daisy E. ferns, conifer group, moss group
All living species in the Osteichthyes clade have endoskeletons composed entirely of cartilage
a. True b. False
Cells become progressively committed to specific patterns of gene activity and developmental fate through a process
known as: a. morphogenesis. b. determination. c. cell differentiation. d. pattern formation. e. growth.
The plastids of kelps and other brown algae arose through secondary endosymbiosis. What modern organisms are most closely related to the type of cell that eventually became these plastids?
A. Chlamydomonas (a single-celled green alga) B. coccolithophorids C. cyanobacteria D. Trypanosoma (a kinetoplastid) E. dinoflagellates