An increase in cardiac sympathetic activity ____________________ the permeability of calcium ions
Fill in the blank(s) with correct word
increases
You might also like to view...
Calcium ions bind to the ________ molecule in skeletal muscle cells
A) actin B) tropomyosin C) myosin D) troponin
Polar bears have black skin. This characteristic helps them deal with cold stress by
a. increasing the amount of air trapped next to the skin. b. increasing the absorption of radiant energy from the sun. c. increasing the insulation provided by subcutaneous fat. d. reducing heat loss by restricting blood flow to the skin.
Only autosomal trisomies involving chromosomes 13, 18, and 21 are survivable. Why would this be?
A) These are relatively short chromosomes. B) These are redundant chromosomes. C) These are relatively long chromosomes. D) These are relatively gene-poor chromosomes. E) These chromosomes have no genes.
When one atom donates an electron to another atom, the donating atom becomes a ________ charged ion, and the receiving atom becomes a ________ charged ion. These ions are joined together by a/an ________ chemical bond.
A. positively; negatively; hydrogen B. negatively; positively; ionic C. positively; negatively; ionic D. negatively; positively; covalent