Cells of the small intestine and kidney tubule have a "brush border" composed of __________, which are cell extensions that increase surface area.

A. plicae
B. rugae
C. flagella
D. microvilli
E. cilia


D. microvilli

Anatomy & Physiology

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Which of the following organisms are able to thrive under the most diverse environmental conditions due to their remarkable biochemical adaptations?

A) Prokaryotes B) Plants C) Fungi D) Invertebrates

Anatomy & Physiology

Immunity can be transferred from mother to child. When the child's immunity is acquired

A.   through the placenta, it is passive immunity, but through breastmilk it is active immunity. B.   through the placenta or through breastmilk, it is passive immunity. C.   through the placenta or through breastmilk, it is active immunity. D.   through the placenta, it is active immunity, but through the breastmilk it is passive immunity.

Anatomy & Physiology

Meiosis of one cell results in production of __________.

A) one gamete. B) four gametes if female, one if male. C) four gametes if male, one if female. D) four gametes.

Anatomy & Physiology

High levels of testosterone inhibit the release of:

A) growth hormone-releasing hormone (GHRH). B) gonadotropin-releasing hormone (GnRH). C) corticotropin-releasing hormone (CRH). D) thyrotropin-releasing hormone (TRH).

Anatomy & Physiology