What increases the basal metabolic rate in an individual?
Starvation.
Sleep.
Aging process.
Stress.
The Correct Answer is D
Stress can increase the basal metabolic rate (BMR) due to the release of stress hormones like adrenaline and cortisol, which can increase the body's energy expenditure.
Stress Response Mechanism
- Brain and Pituitary Gland:
- The stress response begins in the brain, specifically the hypothalamus, which signals the pituitary gland to release adrenocorticotropic hormone (ACTH).
- Adrenal Glands:
- ACTH travels through the bloodstream to the adrenal glands, located above the kidneys. The adrenal glands then release cortisol and adrenaline into the bloodstream.
- Cortisol and Adrenaline Effects:
- Cortisol:
- Cortisol increases glucose production in the liver by converting glycogen (the stored form of glucose) to glucose, making more energy available to the body.
- It also promotes protein breakdown into amino acids, which can be converted to glucose, further increasing energy availability.
- Adrenaline (Epinephrine):
- Adrenaline increases heart rate and blood pressure, enhancing the delivery of oxygen and nutrients to tissues.
- It stimulates glycogenolysis (the breakdown of glycogen to glucose) and lipolysis (the breakdown of fat into fatty acids), providing additional energy sources.
- Cortisol:
- Physiological Changes:
- Liver: Converts glycogen to glucose, increasing blood glucose levels.
- Heart: Accelerated heart rate and increased blood pressure improve oxygen and nutrient delivery.
- Lungs: Increased breathing rate (fast breathing) ensures more oxygen enters the bloodstream.
- Sweat Glands: Increased sweating helps cool the body.
- Digestive System: Digestion slows down, conserving energy for more immediate demands.
- Vision: Tunnel vision may occur as the body focuses on immediate threats.
Impact on Basal Metabolic Rate (BMR)
The combined effects of cortisol and adrenaline lead to an increase in BMR. The body’s energy expenditure rises due to:
- Increased Glucose and Fat Availability: Enhanced breakdown of glycogen and fats provides more fuel for cellular metabolism.
- Heightened Cardiovascular Activity: Increased heart rate and blood pressure raise energy demands.
- Enhanced Cellular Activity: The overall increase in cellular processes, including metabolism and energy production, results in higher energy expenditure.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["A","C","D"]
Explanation
Choice A reason:
“Do you feel your life is empty?” is a relevant question on the geriatric depression scale. Feelings of emptiness can indicate depression, especially in older adults who may experience significant life changes and losses.
Choice B reason:
“Are you on a low cholesterol diet?” is not a relevant question for assessing depression. This question pertains to dietary habits and cardiovascular health rather than mental health.
Choice C reason:
“Have you dropped your activities or interests?” is a pertinent question on the geriatric depression scale. A loss of interest in activities that were once enjoyable is a common symptom of depression.
Choice D reason:
“Do you feel happy most of the time?” is a relevant question on the geriatric depression scale. Assessing overall happiness helps identify depressive symptoms, as individuals with depression often report feeling unhappy or sad most of the time.
Correct Answer is ["A","C","D"]
Explanation
Choice A reason:
If Mr. Greene has memory retention and a neurological evaluation that has demonstrated understanding of how to follow the sliding scale and recognize proper dosage, use, and potential side effects of insulin, he is a candidate for self-administration. This ensures he can manage his insulin therapy safely and effectively.
Choice B reason:
If Mr. Greene states “I can do it” but has severe hand tremors, he is not a candidate for self-administration of insulin. Severe hand tremors can impair his ability to accurately draw up and administer the correct dose of insulin, increasing the risk of errors.
Choice C reason:
If Mr. Greene demonstrates the ability to self-administer insulin over a period of time successfully using the “Teach Back” method by a number of staff or visiting nurse, he is a candidate for self-administration. The “Teach Back” method confirms that he understands and can perform the procedure correctly.
Choice D reason:
If Mr. Greene no longer is actively suicidal and has hand-eye coordination that is accurate, he is a candidate for self-administration of insulin. Accurate hand-eye coordination is essential for safely drawing up and administering insulin.
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