超星 - quiz for week 7

单选题

The underlined part in “biochemistry” means_____.

A. life
B. drug
C. two
D. system

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单选题

Insulin belongs to the group of biomacromolecules called_______.

A. nucleic acids
B. carbohydrates
C. lipids
D. proteins/peptides

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单选题

Pancreas belongs to_______.

A. both cardiovascular system and digestive system
B. both endocrine system and respiratory system
C. both digestive system and endocrine system
D. both cardiovascular system and endocrine system

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单选题

Which of the following statements regarding the release of insulin is correct?

A. Insulin is released by the pancreas at a constant rate throughout the day.
B. Release surges of insulin are responsive to a decrease in the blood glucose level.
C. Release surges of insulin can be observed after meals.
D. Insulin is released by the pancreases only after a meal.

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单选题

Glucose molecules from the blood are transported into the cells by____________.

A. active transport
B. passive diffusion
C. facilitated diffusion

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单选题

Insulin helps glucose to enter the cells by__________.

A. binding to insulin receptors and activating glucose transporters
B. directly creating pores on the cell membrane
C. increasing the concentration gradient of glucose across cell membrane.
D. decreasing the concentration gradient of glucose across cell membrane.

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单选题

When cells are starved for glucose, they begin to use__________ as their energy source.

A. proteins
B. fats
C. nucleic acids
D. hormones

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单选题

Which of the following statements regarding ketones is NOT TRUE?

A. They are metabolites of fats.
B. They are produced by the liver.
C. They can poison and kill cells when they accumulate in the body.
D. They are more efficient energy source than glucose.

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单选题

Type I diabetes________.

A. is also known as juvenile-onset diabetes.
B. is less severe than type II diabetes.
C. more frequently affects obese or middle aged and older people.
D. occurs when cells do not respond normally to insulin.

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单选题

The underlined suffix in “glucose” means_______.

A. sugar
B. protein
C. fat
D. nucleic acid

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