TEST BANK FOR Huether: Understanding Pathophysiology, 7th Edition complete

, Understanding Pathophysiology 7th Edition Test Bank b b b b b




Chapter 1. Cellular Biology b b b




MULTIPLE CHOICE b




1. A student is observing a cell under the microscope. It is observed to have supercoiled DNA
b b b b b b b b b b b b b b b



with histones. Which of the following would also be observed by the student?
b b b b b b b b b b b b b




a. A single circular chromosome
b b b




b. A nucleus b




c. Free-floating nuclear material b b




d. No organelles b




ANS: B b




The cell described is a eukaryotic cell, so it has histones and a supercoiled DNA within its
b b b b b b b b b b b b b b b b



nucleus; thus, the nucleus should be observed.
b b b b b b b




A single circular chromosome is characteristic of prokaryotic cells, which do not have histones.
b b b b b b b b b b b b b




Free-floating nuclear material describes a prokaryotic cell, which would not have a distinct
b b b b b b b b b b b b



nucleus.
b




Eukaryotic cells have membrane bounded cellular components called organelles. No organelles
b b b b b b b b b b



describes a prokaryotic cell.
b b b b




2. A nurse is instructing the staff about cellular functions. Which cellular function is the nurse
b b b b b b b b b b b b b b



describing when an isolated cell absorbs oxygen and uses it to transform nutrients to energy?
b b b b b b b b b b b b b b b




a. Metabolic absorption b




b. Communication
c. Secretion
d. Respiration

,ANS: D b




The ability of the cell to absorb oxygen refers to the cells function of respiration.
b b b b b b b b b b b b b b




The ability of the cell to function within a society of cells refers to its function of
b b b b b b b b b b b b b b b b



communication.
b




The ability of the cell to take in nutrients refers to the cells function of metabolic absorption.
b b b b b b b b b b b b b b b b




The ability of the cell to synthesize new substances and secrete these elsewhere refers to the cells
b b b b b b b b b b b b b b b b



function of secretion.
b b b




3. A eukaryotic cell is undergoing DNA replication. In which region of the cell would most of
b b b b b b b b b b b b b b b



the genetic information be contained?
b b b b b




a. Mitochondria
b. Ribosome
c. Nucleolus
d. Nucleus


ANS: C b




The region of the cell that contains genetic material, including a large amount of ribonucleic
b b b b b b b b b b b b b b



acid, most of the DNA, and DNA-binding proteins, is the nucleolus.
b b b b b b b b b b b




The mitochondria is the site of cellular respiration.
b b b b b b b




The ribosomes are involved in manufacturing of proteins within the cell.
b b b b b b b b b b




The nucleus contains the nucleolus, and it is the nucleolus that contains genetic material.
b b b b b b b b b b b b b




4. The fluid mosaic model for biologic membranes describes membrane behavior. According to
b b b b b b b b b b b



this model, which of the following float singly or as aggregates in the fluid lipid bilayer?
b b b b b b b b b b b b b b b b




a. Peripheral membrane proteins b b




b. Integral membrane proteins b b

, c. Glycoproteins
d. Cell adhesion molecules
b b




ANS: B b




Integral membrane proteins float freely in the fluid lipid bilayer.
b b b b b b b b b




Peripheral membrane proteins are not embedded in the layer, but reside at the surface.
b b b b b b b b b b b b b




Glycoproteins act as cell surface markers.
b b b b b b




Cell adhesion molecules are on the outside of the membrane and allow cells to hook together.
b b b b b b b b b b b b b b b




5. Which of the following can bind to plasma membrane receptors?
b b b b b b b b b




a. Oxygen
b. Ribosomes
c. Amphipathic lipids b




d. Ligands


ANS: D b




Ligands are specific molecules that can bind with receptors on the cell membrane.
b b b b b b b b b b b b




Oxygen moves by diffusion; it does not bind to receptors.
b b b b b b b b b b




Ribosomes make proteins and are not involved in binding.
b b b b b b b b




Amphipathic lipids are a portion of the cell membrane.
b b b b b b b b b




6. A nurse is reviewing a report from a patient with metastatic cancer. What finding would
b b b b b b b b b b b b b b



support the diagnosis of metastatic cancer? Alterations in extracellular matrix that include:
b b b b b b b b b b b b




a. Decreased fibronectin b




b. Increased collagen b




c. Decreased elastin b