The heart is within the ________. a. cranial cavity b. mediastinum c. posterior (dorsal) cavity d. All of the above

Cancer cells can be characterized as “generic” cells that perform no specialized body function. Thus cancer cells lack ________. a. differentiation b. reproduction c. responsiveness d. both reproduction and responsiveness

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

Which of the following statements about chemical bonds is true?

a. Covalent bonds are stronger than ionic bonds.

b. Hydrogen bonds occur between two atoms of hydrogen.

c. Bonding readily occurs between nonpolar and polar molecules.

d. A molecule of water is unlikely to bond with an ion.

Which of the following is a molecule, but not a compound? a. $H_2O$ b. 2H c. $H_2$ d. $H^+$

A collection of similar tissues that performs a specific function is an ________. a. organ b. organelle c. organism d. organ system

Which of the following imaging techniques would be best to use to study the uptake of nutrients by rapidly multiplying cancer cells? a. CT b. MRI c. PET d. ultrasonography

What are two major disadvantages of MRI scans? a. release of radiation and poor quality images b. high cost and the need for shielding from the magnetic signals c. can only view metabolically active tissues and inadequate availability of equipment d. release of radiation and the need for a patient to be confined to metal tube for up to 30 minutes

Which of the following statements about chemical bonds is true?

(a) Covalent bonds are stronger than ionic bonds.
(b) Hydrogen bonds occur between two atoms of hydrogen.
(c) ​Bonding readily occurs between nonpolar and polar molecules
(d) A molecule of water is unlikely to bond with an ion.

When an atom donates an electron to another atom, it becomes a. an ion b. an anion c. nonpolar d. all of the above

The structure that divides the thoracic cavity from the abdominal cavity is the: a. mediastinum b. diaphragm c. lungs d. stomach

Define the following cavities: thoracic, abdominal, pelvic, and abdominopelvic. What is the mediastinum?

Describe the mediastinum and its contents.

Name the two subdivisions of the dorsal cavity. What structure does each contain?