Lecture 6 Part 1 - MC Flashcards
Which transporter is primarily responsible for the uptake of glucose and galactose into enterocytes?
A) GLUT2
B) GLUT4
C) SGLT1
D) GLUT5
C
GLUT5 transporter is specialized to transport which monosaccharide across the apical membrane of enterocytes?
A) Glucose
B) Fructose
C) Galactose
D) All of the above
B
How does the SGLT1 transporter facilitate the entry of glucose and galactose into the enterocytes?
A) It uses ATP directly to transport glucose.
B) It requires the presence of sodium ions to function.
C) It functions independently of any ions.
D) It uses insulin as a signaling molecule.
B
Once in the enterocytes, glucose and galactose are transported into the bloodstream through which transporter?
A) GLUT2
B) GLUT4
C) GLUT5
D) SGLT1
A
Where are GLUT2 transporters present in addition to the apical membrane of enterocytes?
A) Pancreatic beta cells
B) Liver cells
C) Brain neurons
D) Adipocytes
A
What is the primary function of insulin in the liver after it binds to liver cell receptors?
A) To convert galactose to glucose
B) To store glucose as glycogen
C) To release glucose into the bloodstream
D) To transport glucose into liver cells
B
Which transporter is predominantly found in skeletal muscles and is responsive to insulin?
A) GLUT1
B) GLUT3
C) GLUT4
D) GLUT5
C
In which cells does insulin stimulate the conversion of glucose into Gly-3P for triglyceride formation?
A) Pancreatic beta cells
B) Adipocytes
C) Liver cells
D) Brain cells
B
Which glucose transporter is located at the brain’s blood-brain barrier and is always present, independent of insulin?
A) GLUT1
B) GLUT3
C) GLUT2
D) GLUT4
A
At what level of blood glucose concentration is mental function typically impaired, according to the information provided?
A) Below 2 mmol/L
B) Below 5 mmol/L
C) Below 4 mmol/L
D) Below 3 mmol/L
A
