what is the action of the zygomaticus major?

a) elevates the mandible and closes the jaw
b) compresses the cheeks
c) closes the eye in blinking and squinting
d) draws the angle of the mouth upward and laterally


d) draws the angle of the mouth upward and laterally (ex: laughing)

Anatomy & Physiology

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Genes have multiple alleles that differ in DNA sequence because a gene consists of many nucleotides, each of which can be any of four types.

Answer the following statement true (T) or false (F)

Anatomy & Physiology

The signal molecule produced by one animal that may affect the behavior of another animal of the same species is the ________.

Fill in the blank(s) with the appropriate word(s).

Anatomy & Physiology

Vasopressin is normally secreted when a deficit of water develops in the body

Indicate whether the statement is true or false

Anatomy & Physiology

Which compound has the lowest molecular weight?

A) Ammonia B) Urea C) Uric acid D) Protein

Anatomy & Physiology