What feature of cardiac muscle helps the cells coordinate their contraction as a single unit?
A. Fused cells with multiple nuclei
B. Intercalated disks rich in gap junctions
C. Covalent bonds between actin and myosin molecules
D. Large numbers of motor neurons
Answer: B
You might also like to view...
Biosensors involve linking which of the following with electronic circuitry?
A. Microorganisms B. Microbially derived enzymes C. Gene chips D. Both microorganisms and gene chips are used with electronic circuitry. E. Both microorganisms and microbially derived enzymes are used with electronic circuitry. F. Both gene chips and microbially derived enzymes are used with electronic circuitry.
Which part(s) of a neuron that conduct(s) an electrical signal towards an adjacent neuron?
a. dendrites b. cell body c. axon d. both dendrites and the axon e. dendrites, cell body, and the axon
The gonads are another name for
a. the parathyroid and thyroid. b. the ovary and testis. c. the adrenal cortex and medulla. d. the anterior and posterior pituitary. e. none of these
What makes water a good solvent?
a. It dissolves ions and polar molecules. b. It dissolves fats. c. It mixes well with alcohol. d. It heats up very quickly. e. It is very acidic.