Homework: Chapters 1 & 2

Magnesium has 2 valence electrons. Which of the following is the most likely charge of a Mg ion? A. +2 B. +6 C. -2 D. -6

A. +2

Which of the following is an example of a normal physiologic process that uses a positive feedback loop? A. blood clotting B. fluid balance regulation C. blood pressure regulation D. temperature regulation

A. Blood clotting

The heart is within the ________. A. mediastinum B. pleural cavity C. dorsal cavity D. cranial cavity

A. Mediastinum

AB → A + B is a general notation for a(n) ________ reaction. A. decomposition B. synthesis C. anabolic D. exchange

A. decomposition

A reaction that uses water to break apart a larger molecule into smaller parts is called _____. A. hydrolysis B. anabolic C. dehydration synthesis D. catastrophic

A. hydrolysis

To make a banana split, you halve a banana into two long, thin, right and left sides along the ________. A. midsagittal plane B. transverse plane C. coronal plane D. longitudinal plane

A. midsagittal plane

Metabolism can be defined as the ________. A. process whereby new cells are formed to replace worn-out cells B. sum of all chemical reactions in an organism C. process whereby all unspecialized cells become specialized to perform distinct functions D. adjustment by an organism to external or internal changes

B. Sum of all chemical reactions in an organism

The smallest independently functioning unit of an organism is a(n) ________. A. tissue B. cell C. molecule D. organ

B. cell

The only way that the chemical reactions in our cells are able to occur is by lowering the activation energy with the use of a/an ______. A. isotope B. enzyme C. Nucleotide D. protein

B. enzyme

The body system responsible for structural support and movement is the ________ system. A. muscular B. skeletal C. cardiovascular D. endocrine

B. skeletal

The lumbar region is ________. A. inferior to the gluteal region B. superior to the popliteal region C. inferior to the umbilical region D. superior to the cervical region

B. superior to the popliteal region

When a chemical reaction is written, how do you determine the reactants of the reaction? A. The atoms/molecules on the right B. The atoms/molecules on the left C. The atoms/molecules on the 'tail-side' of the arrow D. The atoms/molecules on the 'point-side' of the arrow

C. The atoms/molecules on the 'tail-side' of the arrow

After you eat lunch, nerve cells in your stomach respond to the distension (the stimulus) resulting from the food. They relay this information to ________. A. a set point B. sensors C. a control center D. effectors

C. a control center

Cancer cells can be characterized as "generic" cells that perform no specialized body function. Thus cancer cells lack ________. A. responsiveness B. homeostasis C. differentiation D. reproduction

C. differentiation

A collection of similar tissues that performs a specific function is an ________. A. organ system B. organelle C. organ D. organism

C. organ

Which of the following is a monomer that is a building block of proteins? A. monosaccharide B. nucleotide C. disaccharide D. amino acid

D. Amino Acid

________ reactions release energy. A. All B. Synthesis C. Anabolic D. Exergonic

D. Exergonic

When an atom donates an electron to another atom, it becomes A. an anion B. nonpolar C. lipophilic D. an ion

D. an ion

A phospholipid ________. A. is a building block of ATP B. can donate both cations and anions in solution C. is made up of a triglyceride bonded to a phosphate group D. has both polar and nonpolar regions

D. has both polar and nonpolar regions

The ability of an enzyme's active sites to bind only substrates of compatible shape and charge is known as ________. A. functionality B. specialty C. subjectivity D. specificity

D. specificity