An organic compound always contains
A) oxygen and nitrogen. B) nitrogen and hydrogen.
C) carbon and oxygen. D) carbon and hydrogen.
D
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The relatively small size of the Purkinje fibers allows for the extremely rapid impulse conduction through the ventricles.
Answer the following statement true (T) or false (F)
Being a conformer is beneficial because
A) it's possible to maintain a stable environment. B) it consumes less energy than being a regulator. C) it allows an organism to live in a wide range of environments that differ from its internal environment. D) all of the above
Which of the following statements about conformers and regulators is correct?
A) In a conformer, internal conditions mimic external changes. B) In a regulator, internal conditions regulate external changes. C) An organism could be a thermo-conformer and an ionoregulator. D) both A and C
The fibrous tunic of the eye is composed of two parts. What are they?
A. The cornea and the sclera B. The conjunctiva and the cornea C. The conjunctiva and the sclera D. The sclera and the retina E. The sclera and the uvea