The ________ valve of the heart has three valves with chordae tendineae.

Fill in the blank(s) with the appropriate word(s).


tricuspid

Anatomy & Physiology

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The single-celled protists are often elongated rather than spherical in order to

a. decrease ?X from environment to mitochondria. b. increase "D.". c. increase ?P. d. increase "A.".

Anatomy & Physiology

In reptiles and birds, the evolution of the _____________ removed the dependence on water and allowed complete transition to life on land

Fill in the blank with the correct word.

Anatomy & Physiology

A cation is

A. a combination of atoms held together by chemical bonds. B. an alteration in the three-dimensional structure of a protein. C. a negatively charged ion. D. a molecule that conducts electricity when placed in solution. E. a positively charged ion.

Anatomy & Physiology

Most people retain adequate kidney function in old age. Why?

A. Nephrons use blood more efficiently. B. Glomeruli grow new blood vessels through life. C. A loss of nephrons does not radically impair function because there are so many to begin with. D. Decreased activity in old age leads to a decrease in production of toxins. E. Older people drink less fluid and therefore have less need to produce urine.

Anatomy & Physiology