Picking up a book at a constant speed requires that
a. muscle tension be equal to the book's weight
b. the muscle perform an eccentric contraction
c. the muscle perform an isometric contraction
d. the muscle perform a concentric contraction
e. both a and d occur
D
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The superior colliculi are involved with __________, whereas the inferior colliculi are involved with __________.
A) control of skeletal muscle, blood pressure B) blood pressure, heart rate C) hearing, muscle tone D) breathing, heart rate E) visual reflexes, hearing and auditory reflexes
If vitamins do not provide a source of energy, what is their role in nutrition?
A) they serve as plasma membrane constituents B) they are chemical messengers C) they increase absorption of nutrients D) they absorb excess toxins E) they serve as coenzymes in metabolic pathways
Muscles that are long and round in cross section are termed
A) longus. B) teres. C) longissimus. D) maximus. E) brevis.
The ________ tonsils are the largest, and their surgical removal (tonsillectomy) used to be one of the most common surgical procedures performed in children
A) lingual B) adenoid C) palatine D) pharyngeal E) nasopharyngeal