In skeletal muscle cells, calcium initiates contraction by binding to:
A. tropomyosin.
B. actin.
C. troponin.
D. myosin.
E. the thick filament.
C
Anatomy & Physiology
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In order to maintain cellular homeostasis, one abundant type of exchange pump ejects ________ ions from the cell and imports ________ ions
A) potassium; calcium B) sodium; calcium C) potassium; sodium D) sodium; potassium E) calcium; sodium
Anatomy & Physiology
Abduction takes place around which axis?
A. anteroposterior B. mediolateral C. longitudinal D. horizontal
Anatomy & Physiology
The drug Chantix®, which treats nicotine addiction, is an ________ for the nicotine receptor.
A) agonist B) antagonist
Anatomy & Physiology
Which of the following tissues fills internal spaces and provides structural support?
A) connective tissue B) muscle tissue C) epithelial tissue D) bone tissue E) nervous tissue
Anatomy & Physiology