The beta cells of the pancreas produce insulin, a protein-based hormone. Which of the following organelles would be found in higher levels in the beta cells?
A) microvilli
B) ribosomes
C) mitochondria
D) lysosomes
B) ribosomes
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You have just eaten french fries, buttered toast, ice cream, and whole milk. Which of the following glands would be active in helping you to digest this food?
A) the pancreas B) the buccal glands C) the thyroid gland D) the parotid glands
Which of the following is a correct statement about a simple epithelium?
a. All of the cells are in direct contact with the basement membrane. b. It is designed for protection against mechanical abrasion. c. It is formed from multiple layers of cells. d. It may contain the protein keratin.
A sample of bone has lamellae that are not arranged in osteons. Is the sample more likely from the epiphysis or from the diaphysis?
A) epiphysis B) diaphysis
at three specific checkpoints during the cell cycle a cyclin binds to a Cdk and activates a series of reactions that allow the cell to move on to the next phase. when in the cell cycle do these checkpoints occurs? select three answers.
a) late in the G2 phase b) during the G1 phase c) between the S and G2 phases d) at the end of metaphase e) at the end of prophase