In humans, the respiratory rate is primarily regulated by levels of ________ in the blood, which is detected by nerve cells in the respiratory center

Fill in the blank(s) with correct word


carbon dioxide

Biology & Microbiology

You might also like to view...

Under what circumstances does membrane transport require energy?

A) wherever large molecules are moved within a cell B) whenever a solute is moved against its electrochemical gradient C) whenever an ion moves through a phospholipid bilayer membrane D) whenever oxygen moves through a phospholipid bilayer membrane

Biology & Microbiology

Mammals lose unwanted solutes through

a. urinary excretion only. b. respiration only. c. muscle contraction only. d. respiration and urinary excretion. e. lymph filtering only.

Biology & Microbiology

In the stomach, food processing continues and secretions from stomach glands aid the initial digestion of 

A. carbohydrates. B. nucleic acids. C. vitamins. D. proteins. E. lipids.

Biology & Microbiology

Heritability is a measure of the degree to which the phenotypic variation of a given trait is due to genetic factors

Indicate whether the statement is true or false

Biology & Microbiology