In the context of homeostasis, what role does the pancreas play in glucose regulation?
It stores glucose for later use.
It converts glucose into amino acids.
It secretes insulin to lower blood glucose levels.
It secretes glucagon to increase blood glucose levels.
The Correct Answer is C
A. It stores glucose for later use: Glucose is primarily stored in the liver and muscles as glycogen, not directly in the pancreas. The pancreas regulates blood glucose through hormone secretion rather than storage.
B. It converts glucose into amino acids: The pancreas does not convert glucose into amino acids; its role in glucose regulation is hormonal control through insulin and glucagon.
C. It secretes insulin to lower blood glucose levels: The pancreas contains beta cells in the islets of Langerhans that secrete insulin in response to elevated blood glucose. Insulin facilitates cellular glucose uptake, glycogen synthesis, and helps maintain homeostasis.
D. It secretes glucagon to increase blood glucose levels: Alpha cells in the pancreas secrete glucagon to raise blood glucose when levels are low, but the primary immediate role in lowering high blood glucose is through insulin secretion.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
A. Alveoli: Alveoli are tiny sac-like structures in the lungs where oxygen and carbon dioxide are exchanged between the air and blood. Their thin walls and extensive capillary network maximize gas diffusion efficiency.
B. Pharynx: The pharynx serves as a passageway for both air and food. It does not participate in gas exchange but directs air toward the lower respiratory tract.
C. Trachea: The trachea conducts air between the larynx and bronchi. It provides a clear airway but is not involved in the actual exchange of gases.
D. Bronchi: Bronchi branch from the trachea to deliver air to each lung. They act as air passages and do not serve as the main site for gas exchange.
Correct Answer is D
Explanation
A. Simple squamous epithelium: Simple squamous epithelium consists of a single layer of flat cells. It is specialized for diffusion and filtration, such as in the alveoli and blood vessels, rather than absorption and secretion in the gastrointestinal tract.
B. Transitional epithelium: Transitional epithelium is found in the urinary bladder and ureters, allowing for stretching and expansion. It does not play a primary role in absorption or secretion.
C. Stratified squamous epithelium: Stratified squamous epithelium has multiple layers for protection against abrasion, such as in the skin and esophagus, and is not specialized for efficient nutrient absorption or secretion.
D. Simple columnar epithelium: Simple columnar epithelium consists of a single layer of tall, column-shaped cells, often with microvilli and goblet cells. This structure maximizes surface area for absorption and allows secretion of mucus and digestive enzymes, making it ideal for the gastrointestinal tract.
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.