Practice Q's Flashcards
A student is observing a cell under the microscope. It is observed to have supercoiled DNA with histones. Which of the following would also be observed by the student?
a. a single circular chromosome
b. a nucleus
c. free-floating nuclear material
d. no organelles
b. a nucleus
A nurse is instructing the staff about cellular functions. Which cellular function is the nurse describing when an isolated cell absorbs oxygen and uses it to transform nutrients to energy?
a. metabolic absorption
b. communication
c. secretion
d. respiration
d. respiration
A eukaryotic cell is undergoing DNA replication. In which region of the cell would most of the genetic information be contained?
a. mitochondria
b. ribosome
c. nucleolus
d. nucleus cytoplasm
c. nucleolus
Which of the following can remove proteins attached to the cell’s bilayer by dissolving the layer itself.
a. peripheral membrane proteins
b. integral membrane proteins
c. glycoproteins
d. cell adhesion molecules
b. integral membrane proteins
Which of the following can bind to plasma membrane receptors?
a. oxygen
b. ribosomes
c. amphipathic lipids
d. ligands
d. ligands
A nurse is reviewing a report from a patient with metastatic cancer. What alternation in the extracellular matrix would support the diagnosis of metastatic cancer?
a. decreased fibronectin
b. increased collagen
c. decreased elastin
d. increased glycoproteins
a. decreased fibronectin
Which form of cell communication is used to relate to other cells in direct physical contact?
a. cell junction
b. gap junction
c. desmosome
d. tight junction
a. cell junction
Pancreatic beta cells secrete insulin, which inhibits secretion of glucagon from neighboring alpha cells. This action is an example of which of the following signaling types?
a. paracrine
b. autocrine
c. neurohormonal
d. hormonal
a. paracrine
In cellular metabolism, each enzyme has a high affinity for a:
a. solute
b. substrate
c. receptor
d. ribosome
b. substrate
An athlete runs a marathon, after which his muscles feel fatigued and unable to contract. The athlete asks the nurse why this happened. The nurse’s response is based on the knowledge that the problem is a result of a deficiency of:
a. GTP
b. AMP
c. ATP
d. GMP
c. ATP
Which phase of catabolism produces the most ATP?
a. digestion
b. glycolysis
c. oxidation
d. citric acid cycle
d. citric acid cycle
A nurse is teaching the staff about the phases of cellular catabolism. Which phases should the nurse include?
a. digestion, glycolysis, oxidation, and the citric acid cycle
b. diffusion, osmosis, and mediated transport
c. S phase, G phase, and M phase
d. metabolic absorption, respiration, and excretion
a. digestion, glycolysis, oxidation, and the citric acid cycle
A runner has depleted all the oxygen available for muscle energy. Which of the following will facilitate his continue muscle performance?
a. electron-transport chain
b. aerobic glycolysis
c. anaerobic glycolysis
d. oxidative phosphorylation
c. aerobic glycolysis
A faculty member asks a student to identify the appropriate term for the movement of a solute from an area of greater to lesser concentration. Which answer indicates the nursing student understood the teaching?
a. osmosis
b. diffusion
c. hydrostatic pressure
d. ative transport
b. diffusion
Which description accurately describes electrolytes?
a. small lipid-soluble molecules
b. large protein molecules
c. micronutrients used to produce ATP
d. electrically charged molecules
d. electrically charged molecules
A nurse is reading a chart and sees the term oncotic pressure. The nurse recalls that oncotic pressure (colloid osmotic pressure) is determined by:
a. the concentration of sodium
b. plasma proteins
c. hydrostatic pressure
d. the availability of membrane transporter proteins
b. plasma proteins
A patient has a body fluid of 300 mOsm/kg. This lab result is measuring:
a. osmolality
b. osmolarity
c. osmotic pressure
d. oncotic pressure
a. osmolality
A nurse is discussing the movement of fluid across the arterial end of capillary membranes into the interstitial fluid surrounding the capillary. Which process of fluid movement is the nurse describing?
a. hydrostatic pressure
b. osmosis
c. diffusion
d. active transport
a. hydrostatic pressure
How are potassium and sodium transported across plasma membranes?
a. by passive electrolyte channels
b. by coupled channels
c. by adenosine triphosphate enzyme (ATPase)
d. by diffusion
c. by adenosine triphosphate enzyme (ATPhase)
The ion transporter that moves Na+ and Ca2+ simultaneously in the same direction is an example of which of the following types of transport?
a. biport
b. uniport
c. antiport
d. symport
d. symport
During which process are bacteria engulfed for ingestion?
a. endocytosis
b. pinocytosis
c. phagocytosis
d. exocytosis
c. phagocytosis
Some cancer drugs work during the cell cycle phase where nuclear and cytoplasmic divisions occur. What is this cell cycle phase called?
a. G1
b. S
c. M
d. G2
c. M
Which causes the rapid change in the resting membrane potential that initiates an action potential?
a. potassium gates open, and potassium rushes into the cell, changing the membrane potential from negative to positive
b. sodium gates open, and sodium rushes into the cell, changing the membrane potential from negative to positive
c. sodium gates close, allowing potassium into the cell to change the membrane potential from positive to negative
d. potassium gates close, allowing sodium into the cell to change the membrane potential from positive to negative
b. sodium gates open, and sodium rushes into the cell, changing the membrane potential from negative to positive
A cell is isolated, and electrophysiology studies reveal that the resting membrane potential is -70mV. The predominant intracellular ion is Na+, and the predominant extracellular ion is K+. With voltage change, which of the following would result in an action potential?
a. K+ rushing into the cell
b. Na+ rushing into the cell
c. Na+ rushing out of the cell
c. K+ rushing out of the cell
a. K+ rushing into the cell