The electrostatic attraction between the slight positive charge of a hydrogen of one molecule and the slight negative charge of an oxygen, nitrogen, or fluorine of another molecule is called a(n)

A) nonpolar covalent bond.
B) single covalent bond.
C) polar covalent bond.
D) ionic bond.
E) hydrogen bond.


E

Anatomy & Physiology

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Select the correct statement regarding epithelia.

A) Simple epithelia form impermeable barriers. B) Stratified epithelia are tall, narrow cells. C) Stratified epithelia are present where protection from abrasion is important. D) Pseudostratified epithelia consist of at least two layers of cells stacked on top of one another.

Anatomy & Physiology

Chemical mediators released from platelet granules and plasma membranes stimulate contraction of vascular smooth muscle

Indicate whether the statement is true or false.

Anatomy & Physiology

Which of the following is NOT consistent with active transport?

A. Movement is with a concentration gradient B. Uses cell energy C. Movement is against a concentration gradient D. Involves a carrier E. Exhibits competition and saturation

Anatomy & Physiology

What is the earliest sign of puberty in girls?

A. The appearance of sebaceous and axillary glands B. The onset of breast development C. The appearance of pubic and axillary hair D. The first menstrual period E. The increase in muscle mass

Anatomy & Physiology