Which of the Following Is a Disadvantage of Dry Heat

question 29

Multiple Choice

Which of the following is a disadvantage of dry heat methods such as using a Bunsen burner to incinerate microbes from an inoculating loop and the use of a hot air oven?

• A) Use of an open flame can be dangerous and hot air ovens take much longer to sterilize than autoclaves.
• B) Bunsen burners and hot air ovens only reach a maximum of 100oC so they are not effective against endospores.
• C) Neither of these methods actually sterilize; they only kill vegetative cells.
• D) Bunsen burners take too long to sterilize and hot air ovens are hazardous for the operators.

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Definitions:

Signal Transmission

The process by which information is conveyed from one place to another through electrical impulses, chemical signals, or physical movements.

Dendrites

A neuron’s often bushy, branching extensions that receive and integrate messages, conducting impulses toward the cell body.

Neurotransmitters

Chemicals released by neurons in the brain and nervous system to transmit signals between nerve cells.

Parasympathetic

Part of the autonomic nervous system that conserves energy as it slows the heart rate, increases intestinal and gland activity, and relaxes sphincter muscles in the gastrointestinal tract.