Deck 1: Cellular Biology

Question 1

The fluid mosaic model for biologic membranes describes membrane behavior.According to this model,which of the following float singly or as aggregates in the fluid lipid bilayer?

A) Peripheral membrane proteins
B) Integral membrane proteins
C) Glycoproteins
D) Cell adhesion molecules

Answer 1

Integral membrane proteins

Question 2

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

Answer 2

Paracrine

Question 3

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

Answer 3

A nucleus

Question 4

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

Question 5

Which of the following can bind to plasma membrane receptors?

A) Oxygen
B) Ribosomes
C) Amphipathic lipids
D) Ligands

Question 6

A patient who has diarrhea receives a hypertonic saline solution intravenously to replace the sodium and chloride lost in the stool.What effect will this fluid replacement have on cells?

A) Cells will become hydrated.
B) Cells will swell or burst.
C) Cells will shrink.
D) Cells will divide.

Question 7

A nurse is reviewing a report from a patient with metastatic cancer.What finding would support the diagnosis of metastatic cancer? Alterations in extracellular matrix that include:

A) Decreased fibronectin
B) Increased collagen
C) Decreased elastin
D) Increased glycoproteins

Question 8

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

Question 9

A nurse is teaching a patient about fluid and electrolytes.Which of the following indicates the teaching was successful regarding electrolytes? Electrolytes are:

A) Small lipid-soluble molecules
B) Large protein molecules
C) Micronutrients used to produce ATP
D) Electrically charged molecules

Question 10

The faculty member asked the student to identify the appropriate term for the movement of small,electrically uncharged molecules through a semipermeable barrier.Which answer indicates the nursing student understood the teaching?

A) Osmosis
B) Diffusion
C) Hydrostatic pressure
D) Active transport

Question 11

In cellular metabolism,each enzyme has a high affinity for a:

A) Solute
B) Substrate
C) Receptor
D) Ribosome

Question 12

A nurse is teaching the staff about the three phases of cellular catabolism.Which of the following should the nurse include?

A) Digestion, glycolysis and 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

Question 13

Which phase of catabolism produces the most ATP?

A) Digestion
B) Glycolysis
C) Oxidation
D) Citric acid cycle

Question 14

A runner has depleted all the oxygen available for muscle energy.Which of the following will facilitate his continued muscle performance?

A) Electron-transport chain
B) Aerobic glycolysis
C) Anaerobic glycolysis
D) Oxidative phosphorylation

Question 15

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

Question 16

Which form of cell communication is used to relate to other cells in direct physical contact?

A) Cell junction
B) Gap junction
C) Desmosomes
D) Tight junctions

Question 17

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) Concentration of sodium
B) Plasma proteins
C) Hydrostatic pressure
D) Availability of membrane transporter proteins

Question 18

An athlete runs a marathon,after which his muscles feel fatigued and unable to contract.The athlete asks the nurse why this happened.How should the nurse respond? A deficiency in ________ can cause impaired muscle contraction.

A) GTP
B) AMP
C) ATP
D) GMP

Question 19

In teaching a patient with cirrhosis,which information should the nurse include regarding cholesterol?

A) Cholesterol decreases the membrane fluidity of the erythrocyte, which reduces its ability to carry oxygen.
B) Cholesterol decreases the membrane fluidity of erythrocytes, which reduces its ability to carry hemoglobin.
C) Cholesterol increases the membrane fluidity of erythrocytes, which allows binding of excess glucose.
D) Cholesterol increases the membrane fluidity of erythrocytes, which prolongs its life span beyond 120 days.

Question 20

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

Question 21

The student is reviewing functions of the cell.The student would be correct in identifying the primary function of the nerve cell as:

A) Sensory interpretation
B) Conductivity
C) Maintenance of homeostasis
D) Communication

Question 22

The phase of the cell cycle during which the centromeres split and the sister chromatids are pulled apart is referred to as:

A) Anaphase
B) Telophase
C) Prophase
D) Metaphase

Question 23

A biopsy of the lung bronchi revealed ciliated epithelial cells that are capable of secretion and absorption.These cells are called _____ columnar epithelium.

A) Simple
B) Ciliated simple
C) Stratified
D) Pseudostratified ciliated

Question 24

A nurse recalls that the four basic types of tissues are (select all that apply):

A) Nerve
B) Epithelial
C) Mucosal
D) Connective
E) Skeletal
F) Muscle

Question 25

Characteristics of prokaryotes include which of the following? (Select all that apply.)

A) They contain no organelles.
B) Their nuclear material is not encased by a nuclear membrane.
C) They contain a distinct nucleus.
D) They contain histones.
E) They contain a cellular membrane.

Question 26

A nurse is teaching a patient with diabetes how glucose is transported from the blood to the cell.What type of transport system should the nurse discuss with the patient?

A) Active-mediated transport (active transport)
B) Active diffusion
C) Passive osmosis
D) Passive-mediated transport (facilitated diffusion)

Question 27

Some cancer drugs work during the cell cycle phase where nuclear and cytoplasmic division occurs.What is this cell cycle phase called?

A) G₁
B) S
C) M
D) G₂

Question 28

A cell is isolated,and electrophysiology studies reveal that the resting membrane potential is -70 millivolts.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
D) K⁺ rushing out of the cell

Question 29

The student is studying for a pathophysiology exam and is trying to remember the definition of amphipathic.The student should choose which of the following to be correct?

A) All cells have a membrane that is composed of lipids.
B) Cells have organelles that have specialized function.
C) Molecules are polar with one part loving water and one part hating water.
D) Cells have receptor sites that other substances attach to and create additional functions.

Question 30

What is the role of cytokines in cell reproduction?

A) Provide growth factor for tissue growth and development
B) Block progress of cell reproduction through the cell cycle
C) Restrain cell growth and development
D) Provide nutrients for cell growth and development

Question 31

A nurse is teaching the staff about cholesterol.Which information should be taught? The cellular uptake of cholesterol depends on:

A) Active-mediated transport
B) The antiport system
C) Receptor-mediated endocytosis
D) Passive transport

Question 32

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

Question 33

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

Question 34

A nurse is teaching the staff about platelet-derived growth factor.Which information should the nurse include? Platelet-derived growth factor (PDGF)stimulates the production of:

A) Platelets
B) Epidermal cells
C) Connective tissue cells
D) Fibroblast cells

Question 35

Why is potassium able to diffuse easily in and out of cells?

A) Because potassium has a greater concentration in the intracellular fluid (ICF)
B) Because sodium has a greater concentration in the extracellular fluid (ECF)
C) Because the resting plasma membrane is more permeable to potassium
D) Because there is an excess of anions inside the cell

Question 36

During which process can lysosomal enzymes be released to degrade engulfed particles?

A) Endocytosis
B) Pinocytosis
C) Phagocytosis
D) Exocytosis

Question 37

The nurse would be correct in identifying the predominant extracellular cation as:

A) Sodium
B) Potassium
C) Chloride
D) Glucose

Question 38

What 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.