What does an ECG record?

A. blood volume
B. brain activity
C. hormonal changes
D. heart sounds
E. electrical changes


Answer: E

Biology & Microbiology

You might also like to view...

Variation arises in asexually reproducing populations by ________

a. mutation b. all of the choices c. natural selection d. recombination

Biology & Microbiology

During an autoimmune response, the body's immune cells may attack ________. a. the cells in the pancreas b. All of these choices

c. the cells in the thyroid d. the cells in the skin e. the neuromuscular junction

Biology & Microbiology

What type of mutation occurs due to exposure to damaging environmental agents?

a. transition substitutions b. spontaneous mutations c. induced mutations d. transverse substitutions

Biology & Microbiology

Development and reproduction of an organism is guided by instructions from

a. the blood. b. the brain. c. DNA. d. the environment. e. RNA.

Biology & Microbiology