Provide an Appropriate Response

question 165

Multiple Choice

Provide an appropriate response.
-A nutritionist wants to conduct a study to validate the efficacy of an herb as an aid in weight loss. She randomly
Assigns half of a group of overweight persons to a treatment group who are given the herb with instructions as
To use and a planned diet for six weeks. The other half of the group is given a placebo with the same instructions
And same diet. None of the participants know to which group they belong. She weighs each subject on Friday of
Each week. What type of blinding is being used?

• A)single-blind
• B)double-blind
• C)triple-blind
• D)does not use blinding

---

Definitions:

SA Node

The sinoatrial node, a group of cells located in the right atrium of the heart that generates electrical impulses initiating each heartbeat.

SA Node

The sinoatrial node, often called the heart's natural pacemaker, initiates electrical impulses that set the rate and rhythm of heartbeats.

Ventricular Contractions

The tightening of the heart's ventricles, which pumps blood out of the heart and into the arteries.

P-QRS Waves

Represents the electrical activity that triggers the heartbeat, as recorded by an electrocardiogram.