Isotopes of an element differ in the number of
A) protons in the nucleus.
B) electrons in the nucleus.
C) neutrons in the nucleus.
D) electron clouds.
E) electrons in energy shells.
Answer: C
You might also like to view...
Which is a TRUE statement about excitation-contraction coupling?
A. In skeletal muscle cells, it requires the influx of extracellular calcium ion. B. In smooth muscle cells, it must be preceded by an action potential in the cell membrane. C. In all kinds of muscle it requires the entry of calcium from the extracellular fluid. D. Calcium-induced calcium-release plays a role in cardiac muscle cells, as well as in some smooth muscle cells. E. In skeletal muscle cells, excitation-contraction coupling begins when an action potential propagates along the sarcoplasmic reticulum membrane.
The pneumotaxic center
A) is in the pons. B) excites the apneustic center. C) inhibits the apneustic center. D) both is in the pons and excites the apneustic center. E) both is in the pons and inhibits the apneustic center.
The pounding or racing heart with or without irregularity in rhythm is ________________
Fill in the blank(s) with correct word
Alcohol consumption causes peripheral vasoconstriction. Why is drinking wine in a hot tub not advised?
What will be an ideal response?