18 Questions
What happens to glucose concentration inside muscle cells when insulin is not available?
It remains close to zero
What is the primary function of muscle glycogen?
Used for short periods of extreme energy
What does insulin do with glucose absorbed after a meal?
Stores it in muscle cells
What happens to liver glycogen when hypoglycemia appears?
Is split into glucose and released into the blood
How does insulin affect the liver's use of glucose?
Stimulates storage of glucose as glycogen
What effect does glucagon have on liver glycogen during hypoglycemia?
Stimulates conversion of glycogen to glucose
What happens when insulin is not available in the body?
Vesicles carrying glucose transport proteins separate from the membrane
Which of the following tissues show rapid uptake, storage, and use of glucose in response to insulin?
Adipose tissue
What facilitates glucose uptake into cells by binding with the membrane?
Glucose transport proteins
What is the main source of energy for muscles most of the day?
Fatty acids
What is the primary effect of glucagon in the liver?
Causing glycogenolysis
What effect does muscle contraction have on glucose transporter 4 (GLUT 4)?
Stimulates translocation to the cell membrane
Which type of glucose transporter is insulin-dependent and involved in the uptake of glucose by muscle and adipose cells?
GLUT 4
Which process leads to the storage and use of glucose by almost all tissues, especially muscles, adipose, and liver cells?
Insulin secretion
What is the role of insulin in promoting glyconeogenesis and glycogenolysis?
Facilitating the use of new glucose in cells
Where is GLUT 2 predominantly found among the following cells?
Pancreatic beta-cells
Which hormone increases insulin secretion leading to glyconeogenesis and glycogenolysis?
Glucagon
What is the function of GLUT 1 among the following?
Basal rate glucose uptake in all cells
Test your knowledge on how cell membranes facilitate glucose uptake and the role of insulin in the process. Learn about the translocation of vesicles carrying glucose transport proteins and their interaction with the cell membrane. Explore the changes in membrane permeability to amino acids and potassium when insulin is not available.
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