A hydroxide ion carries a negative charge.
Answer the following statement true (T) or false (F)
True
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Surfactant helps to prevent the alveoli from collapsing by ________.
A) humidifying the air before it enters B) warming the air before it enters C) interfering with the cohesiveness of water molecules, thereby reducing the surface tension of alveolar fluid D) protecting the surface of alveoli from dehydration and other environmental variations
Answer the following statements true (T) or false (F)
1. The soleus is a synergist of the gastrocnemius during plantar flexion. 2. Muscles that help to maintain posture are often called synergists. 3. In order to propel food down to the esophagus, the pharyngeal constrictor muscles are used. 4. Plantar flexion at the ankle joint is accomplished by the tibialis anterior muscle 5. The arrangement of a muscle's fascicles determines its range of motion and power.
A ________________________________________ is a surgical knife
Fill in the blank(s) with correct word
Why are urination and defecation under voluntary control?
A. The external and anal sphincters are composed of skeletal muscle tissue. B. The external and anal sphincters are composed of multi-unit muscle tissue. C. The nerves that supply external urethral and anal sphincters have varicosities. D. The urogenital diaphragm is voluntary while the pelvic diaphragm is involuntary. E. The external urethral and anal sphincters are innervated by the autonomic nervous system.