Which of the following systems is mismatched?

Urinary -- Includes kidney & bladder; removes wastes

Endocrine -- Includes the hormone producing glands, involved in metabolism and growth, puberty, sexual reproduction, etc.

Respiratory -- Includes lungs, involved in gas exchange & pH balance

Digestive -- Includes blood vessels, transports nutrients and gases to organs and wastes (CO2) from organs

Answer and Explanation

The Correct Answer is D

A. Urinary – Includes kidney & bladder; removes wastes: The urinary system includes the kidneys and bladder, which remove nitrogenous waste and regulate water and electrolyte balance.
B. Endocrine – Includes the hormone-producing glands: The endocrine system includes pituitary, thyroid, adrenal glands, etc., involved in metabolism, growth, and reproduction.
C. Respiratory – Includes lungs, involved in gas exchange & pH balance: The lungs are central to the exchange of O₂ and CO₂, which also helps regulate blood pH.
D. Digestive – Includes blood vessels, transports nutrients and gases to organs and wastes (CO2) from organs: Blood vessels are primarily part of the circulatory system, not the digestive system. The digestive system includes the mouth, esophagus, stomach, intestines, liver, pancreas, etc., which process food and absorb nutrients-not gas transport.

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Correct Answer is C

Explanation

A. isotope; 27: The atomic number (27) refers to the number of protons, not neutrons. Isotopes have the same protons, different neutrons.
B. isomer; 33: An isomer is a different structural arrangement of the same molecules-not applicable here.
C. isotope; 33: Cobalt 60 is an isotope of Cobalt 59 (same protons, different neutrons).
Neutrons = mass number – atomic number = 60 – 27 = 33
D. isotope; 32: 60 – 27 = 33, not 32 neutrons.

A. covalent B. ionic C. polar covalent D. hydrogen

Correct Answer is C

Explanation

A. covalent: This is too general. Covalent bonds involve shared electrons, but do not specify if sharing is equal or unequal.
B. ionic: Ionic bonds involve transfer of electrons, typically between metals and nonmetals. Carbon and oxygen share electrons.
C. polar covalent: A polar covalent bond involves unequal sharing of electrons. Electrons spend more time around oxygen because it is more electronegative than carbon.
D. hydrogen: A hydrogen bond is an intermolecular force, not a bond between carbon and oxygen atoms.

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Which of the following systems is mismatched?

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Naxlex Comprehensive Predictor Exams

The elemental cobalt (Cobalt 59) has an atomic number of 27 and a mass number of 59. Cobalt 60 is a radioactive atom used in cancer therapy. You would say Cobalt 60 is an of Cobalt 59, and has how many neutrons in its nucleus?

Correct Answer is C

Explanation

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Correct Answer is C

Explanation

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