Which of the following statements about the endocrine system is false?
A) It has target cells that are mainly in distant tissues.
B) It affects only cells with appropriate receptors.
C) It releases secretions directly into body fluids.
D) It is regulated by negative feedback mechanisms.
E) It releases hormones, all of which are lipids, directly into the bloodstream.
Answer: E
You might also like to view...
When the kidney secretes hydrogen ions:
a. the pH of the urine rises b. sodium ions are added to the urine also c. the bicarbonate ion is added to the urine also d. none of the above
One primary oocyte containing 46 doubled chromosomes yields only one ovum containing 23 unpaired chromosomes
Indicate whether the statement is true or false
Neurons must be provided with a reliable supply of glucose because they are __________.
a. involved primarily with transmitting nerve impulses b. covered with myelinated fibrous sheaths c. usually unable to metabolize other molecules d. primarily located in the brain
Blood flow is greatest at the ________ of the lungs and perfusion is greatest at the ________ of the lungs.
A. base; base B. base; apex C. apex; apex D. apex; base