The body system which functions to regulate the activities of other body systems by secreting chemical messengers called hormones is the

A. endocrine system.
B. cardiovascular system.
C. nervous system.
D. respiratory system.


Ans: A. endocrine system.

Biology & Microbiology

You might also like to view...

What is NOT a component of the translation machinery?

A. mRNA B. tRNA C. translation factors D. ribosomes E. protein polymerase

Biology & Microbiology

Any change in allele frequencies in a gene pool

is

a. natural selection. b. macroevolution. c. microevolution. d. mutation. e. artificial selection

Biology & Microbiology

Rods are

a. sensitive to red light. b. sensitive to green light. c. sensitive to blue light. d. relatively insensitive to dim light. e. sensistive to dim light.

Biology & Microbiology

Antibiotics are most likely to be effective in the treatment of infections caused by

A) bacteria. B) viruses. C) parasitic worms. D) lice and ticks. E) prions.

Biology & Microbiology