Biology Praxis (5236)
Determine if smooth muscle, cardiac muscle, and skeletal muscle is striated - answer-
Smooth: Not striated
- Cardiac: Striated
- Skeletal: Striated
True or False: The student should start to wash off a chemical spilled on the skin while
reporting the incident. - answer True
What is the safety shower used for? - answer- for contaminated clothing
- if clothing catches on fire
What is a fire blanket used for? - answerto smother a lab fire
When should a student use an eyewash station? - answerIf a chemical gets in their
eyes
Other types of safety equipment include (4) - answer- fire extinguisher
- phone
- spill neutralizers
- first aid box
Which are more preferred: Glasses or contact lenses in the lab? - answerGlasses b/c
contacts carry a risk of chemicals getting caught between the lens and the eye
What is the purpose of a Fume Hood? How to use? - answer- carries away vapors from
reagents or reactions
- Equipment should be placed as far back in the hood as practical to help enhance the
collection of fumes
Purpose of Glass Safety Shield of Fume Hood? - answerautomatically closes to the
appropriate height and should be low enough to protect the face and body
What are the 6 safety hazards in a lab? - answer- Fire
- Explosion
- Chemical and thermal burns
- Inhalation of toxic fumes
- Absorption
- Ingestion
How can a fire be caused in the lab? - answerCan be caused by volatile solvents such
as ether, acetone, and benzene being kept in an open container.
,How should solvents be heated to prevent a fire from taking place? - answerSolvents
should be heated in a hood with a steam bath, not on a hot plate!
How can an Explosion occur? - answerHeating or creating a reaction in a closed
system, which can result in flying glass and chemical splashes.
How can explosions be prevented? - answerThe system should be vented
How are Chemical/thermal burns caused? - answerMany chemicals are corrosive to the
skin and eyes
How can inhalation of toxic fumes be dangerous? - answerSome compounds severely
irritate membranes in the eyes, nose, throat, and lungs
How can Absorption be dengaerous? - answerAbsorption of toxic chemicals such as
dimethyl sulfoxide (DMSO) and nitrobenzene through the skin
How can Ingestion be dangerous? - answerIngesting toxic chemicals
What are the considerations when choosing gloves? (5) - answer- Gloves that are
highly protective may limit dexterity
- Some gloves may not offer appropriate protection against a specific chemical
- Degradation rating
- Breakthrough time
- Permeation rate
Define Degradation rating - answerindicates how effective a glove is when exposed to
chemicals
Define Breakthrough time - answerindicates how quickly a chemical can break through
the surface of the glove
Define Permeation rate - answerindicates how quickly chemicals can seep through after
the initial breakthrough
What are typically the most appropriate types of gloves used? - answerDisposable:
- Latex
- Vinyl
- Nitrile
What is the purpose of Double-gloving? - answercan improve resistance or dexterity in
some instances
,True or False: Potentially hazardous materials intended for use in science labs should
not be secured in a safe area where relevant SDS can be accessed. - answerFalse,
they should be!
What does SDS stand for? - answerSafety Data Sheets
What should be done with extra chemicals in the lab? - answerThey should be disposed
of as directed by the school district's rules or local ordinances - they should NOT be
returned back to the original container!!
Where should acids be stored? - answerSeparately, away from other chemicals
Where should flammables be stored? - answerAway from acids, bases, and oxidizers
How to use a Bunsen Burner? (4) - answer- Strikers should be used instead of matches
- Produce a medium blue flame
- Tongs should be used to hold the material in the flame
- The flame is extinguished by turning off the gas at the source
What is the difference between a Lab Notebook and a Lab Report? - answer- Lab
Notebook: formal record of lab preparations and of all pre-lab and lab work
- Lab Report: prepared after lab work is completed
True or False: Observational recordings should not be altered, erased, or whited-out to
make corrections. - answerTrue
What should you do if you mis-wrote in a Lab Notebook? - answerDraw a single line
through it
How should Entries be made in a Lab Notebook? - answershould provide detailed info
and be recorded in a way that another person should be able to replicate the
experiment
How should Quantitative data be recorded in a Lab Notebook? - answerIn tabular form,
and may include calculations made during an experiment
True or False: Lab book entries can include references and research performed before
the experiment. - answerTrue
What sections can Entries include? (4) - answer- Objective/Purpose (states the problem
that was explored or the question that was answered)
- Procedures
- Data Collected
- Results
What should a Lab Report include? (6) - answer- Brief but descriptive Title
, - Abstract (summary of the report)
- Hypothesis
- Control
- Variable
- Conclusion (explains whether the results supported the hypothesis)
What are the 2 types of flasks used in lab? - answerErlenmeyer and Volumetric
When should Volumetric flasks be used? - answerused to accurately prepare a specific
volume and concentration of solution
When should Erlenmeyer flasks be used? - answerfor mixing, transporting, and reacting
but are NOT appropriate for accurate measurements!
What is a pipette used for? - answerto accurately measure small amounts of liquid
Where is the liquid read of a pipette? - answerAt the Meniscus
What is a repipette? - answerhand-operated pump that dispenses solution
What are beakers used for? - answermeasure mass or dissolve a solvent in a solute,
they DO NOT measure volume as accurately as a volumetric flask, pipette, graduated
cylinder, or burette
What are graduated cylinders used for? - answerprecise measurements, considered
more accurate than Erlenmeyer flasks or beakers
How to read a graduated cylinder? (3) - answer- should be placed on a flat surface
- read at eye level
- measurement should be taken from the bottom of the curve that the liquid forms
What is a burette? - answerpiece of lab glassware used to accurately dispense liquid
(used for dilutions)
What is the most commonly used microscope in labs? - answerOptical (light
microscopes)
What is the difference in lens between a simple microscope and a compound
microscope? - answer- Simple: 1 lens
- Compound: 3 lens
How do Scanning electron microscopes work? - answerSEMs provide greater detail of a
sample in terms of the surface topography and can produce magnifications much
greater than those possible with optical microscopes
Determine if smooth muscle, cardiac muscle, and skeletal muscle is striated - answer-
Smooth: Not striated
- Cardiac: Striated
- Skeletal: Striated
True or False: The student should start to wash off a chemical spilled on the skin while
reporting the incident. - answer True
What is the safety shower used for? - answer- for contaminated clothing
- if clothing catches on fire
What is a fire blanket used for? - answerto smother a lab fire
When should a student use an eyewash station? - answerIf a chemical gets in their
eyes
Other types of safety equipment include (4) - answer- fire extinguisher
- phone
- spill neutralizers
- first aid box
Which are more preferred: Glasses or contact lenses in the lab? - answerGlasses b/c
contacts carry a risk of chemicals getting caught between the lens and the eye
What is the purpose of a Fume Hood? How to use? - answer- carries away vapors from
reagents or reactions
- Equipment should be placed as far back in the hood as practical to help enhance the
collection of fumes
Purpose of Glass Safety Shield of Fume Hood? - answerautomatically closes to the
appropriate height and should be low enough to protect the face and body
What are the 6 safety hazards in a lab? - answer- Fire
- Explosion
- Chemical and thermal burns
- Inhalation of toxic fumes
- Absorption
- Ingestion
How can a fire be caused in the lab? - answerCan be caused by volatile solvents such
as ether, acetone, and benzene being kept in an open container.
,How should solvents be heated to prevent a fire from taking place? - answerSolvents
should be heated in a hood with a steam bath, not on a hot plate!
How can an Explosion occur? - answerHeating or creating a reaction in a closed
system, which can result in flying glass and chemical splashes.
How can explosions be prevented? - answerThe system should be vented
How are Chemical/thermal burns caused? - answerMany chemicals are corrosive to the
skin and eyes
How can inhalation of toxic fumes be dangerous? - answerSome compounds severely
irritate membranes in the eyes, nose, throat, and lungs
How can Absorption be dengaerous? - answerAbsorption of toxic chemicals such as
dimethyl sulfoxide (DMSO) and nitrobenzene through the skin
How can Ingestion be dangerous? - answerIngesting toxic chemicals
What are the considerations when choosing gloves? (5) - answer- Gloves that are
highly protective may limit dexterity
- Some gloves may not offer appropriate protection against a specific chemical
- Degradation rating
- Breakthrough time
- Permeation rate
Define Degradation rating - answerindicates how effective a glove is when exposed to
chemicals
Define Breakthrough time - answerindicates how quickly a chemical can break through
the surface of the glove
Define Permeation rate - answerindicates how quickly chemicals can seep through after
the initial breakthrough
What are typically the most appropriate types of gloves used? - answerDisposable:
- Latex
- Vinyl
- Nitrile
What is the purpose of Double-gloving? - answercan improve resistance or dexterity in
some instances
,True or False: Potentially hazardous materials intended for use in science labs should
not be secured in a safe area where relevant SDS can be accessed. - answerFalse,
they should be!
What does SDS stand for? - answerSafety Data Sheets
What should be done with extra chemicals in the lab? - answerThey should be disposed
of as directed by the school district's rules or local ordinances - they should NOT be
returned back to the original container!!
Where should acids be stored? - answerSeparately, away from other chemicals
Where should flammables be stored? - answerAway from acids, bases, and oxidizers
How to use a Bunsen Burner? (4) - answer- Strikers should be used instead of matches
- Produce a medium blue flame
- Tongs should be used to hold the material in the flame
- The flame is extinguished by turning off the gas at the source
What is the difference between a Lab Notebook and a Lab Report? - answer- Lab
Notebook: formal record of lab preparations and of all pre-lab and lab work
- Lab Report: prepared after lab work is completed
True or False: Observational recordings should not be altered, erased, or whited-out to
make corrections. - answerTrue
What should you do if you mis-wrote in a Lab Notebook? - answerDraw a single line
through it
How should Entries be made in a Lab Notebook? - answershould provide detailed info
and be recorded in a way that another person should be able to replicate the
experiment
How should Quantitative data be recorded in a Lab Notebook? - answerIn tabular form,
and may include calculations made during an experiment
True or False: Lab book entries can include references and research performed before
the experiment. - answerTrue
What sections can Entries include? (4) - answer- Objective/Purpose (states the problem
that was explored or the question that was answered)
- Procedures
- Data Collected
- Results
What should a Lab Report include? (6) - answer- Brief but descriptive Title
, - Abstract (summary of the report)
- Hypothesis
- Control
- Variable
- Conclusion (explains whether the results supported the hypothesis)
What are the 2 types of flasks used in lab? - answerErlenmeyer and Volumetric
When should Volumetric flasks be used? - answerused to accurately prepare a specific
volume and concentration of solution
When should Erlenmeyer flasks be used? - answerfor mixing, transporting, and reacting
but are NOT appropriate for accurate measurements!
What is a pipette used for? - answerto accurately measure small amounts of liquid
Where is the liquid read of a pipette? - answerAt the Meniscus
What is a repipette? - answerhand-operated pump that dispenses solution
What are beakers used for? - answermeasure mass or dissolve a solvent in a solute,
they DO NOT measure volume as accurately as a volumetric flask, pipette, graduated
cylinder, or burette
What are graduated cylinders used for? - answerprecise measurements, considered
more accurate than Erlenmeyer flasks or beakers
How to read a graduated cylinder? (3) - answer- should be placed on a flat surface
- read at eye level
- measurement should be taken from the bottom of the curve that the liquid forms
What is a burette? - answerpiece of lab glassware used to accurately dispense liquid
(used for dilutions)
What is the most commonly used microscope in labs? - answerOptical (light
microscopes)
What is the difference in lens between a simple microscope and a compound
microscope? - answer- Simple: 1 lens
- Compound: 3 lens
How do Scanning electron microscopes work? - answerSEMs provide greater detail of a
sample in terms of the surface topography and can produce magnifications much
greater than those possible with optical microscopes
