In the intestine, ________ ensure(s) that most digested nutrients pass through the epithelial cells and not between them.

A. the plasma membrane
B. desmosomes
C. gap (communicating) junctions
D. tight junctions
E. ground substance


Answer: D

Anatomy & Physiology

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What muscle raises the upper eyelid?

A) lacrimal B) orbicularis oculi C) levator palpebrae superioris D) superior rectus muscle

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Which of the following produces a lipid-rich secretion that prevents the upper and lower eyelids from sticking together at their edges?

A) palpebra B) lacrimal caruncle C) chalazion D) tarsal gland E) conjunctiva

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What are the three components of a typical cell?

A) Nucleic acids, organelles, and nucleus B) Nucleus, plasma membrane, and cell wall C) Nucleic acids, cells wall, and organelles D) Nucleus, plasma membrane, and cytoplasm

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