A researcher discovered a sensory receptor that detects decreasing oxygen concentrations in the blood. According to the principles of negative feedback, it is likely that stimulation of this sensory receptor will produce which of the following response(s)?
a decrease in heart rate
an increase in the respiratory rate
a decrease in the respiratory rate
A and C
A and B
The Correct Answer is B
A. a decrease in heart rate: Low oxygen usually triggers the body to increase heart rate to deliver more oxygen-not decrease it.
B. an increase in the respiratory rate: In negative feedback, low oxygen stimulates chemoreceptors which trigger an increase in respiratory rate to bring in more oxygen.
C. a decrease in the respiratory rate: This would worsen the low oxygen state, and is contrary to how the body responds.
D. A and C: Both options are inappropriate responses to low oxygen levels.
E. A and B: While B is correct, A is not, so this combination is also incorrect.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
A. Anterior:
This means “front” of the body in general, but is too broad and non-specific. The abdomen is located on the anterior side, but “ventral” is the more precise term in this context.
B. Distal:
Means farther from the point of attachment; applies to limbs, not the torso/abdomen.
C. Ventral:
The ventral cavity includes the thoracic and abdominopelvic cavities. A shot to the abdomen involves the ventral aspect of the body.
D. Brachial:
Refers to the upper arm area – unrelated to the abdomen.
E. Proximal:
Means closer to the point of attachment; again, more relevant to limbs.
Correct Answer is B
Explanation
A. voltage gated ion channels: These open in response to changes in membrane potential, not chemical binding.
B. ligand gated ion channels: Ligands (like neurotransmitters) bind to the channel, causing it to open or close.
C. G-protein complex linked receptor proteins: These are receptors that activate intracellular signaling cascades, not ion channels directly.
D. carrier proteins: Carrier proteins transport substances across membranes but do not form open channels.
Whether you are a student looking to ace your exams or a practicing nurse seeking to enhance your expertise , our nursing education contents will empower you with the confidence and competence to make a difference in the lives of patients and become a respected leader in the healthcare field.
Visit Naxlex, invest in your future and unlock endless possibilities with our unparalleled nursing education contents today
Report Wrong Answer on the Current Question
Do you disagree with the answer? If yes, what is your expected answer? Explain.
Kindly be descriptive with the issue you are facing.