The potential difference is caused by a difference in concentration of charged particles on either side of the cell membrane.
a. true
b. false
a. true
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________ is a condition in which the heart rate is slower than normal.
A) Cardiac arrhythmia B) Bradycardia C) Tetanus D) Summation E) Tachycardia
Which statement is not accurate about the absolute refractory period?
a. Another stimulus, regardless of its strength, cannot initiate another action potential during this period b. During this period, voltage-gated Na+ channels open, then close but are inactivated c. Immediately following this period, the membrane can experience another action potential if the stimulus is strong enough d. This period occurs during the after hyperpolarization phase of the action potential e. This period ensures a unidirectional spread of the action potential down a nerve fiber
Which tissue contains a calcified ground substance and is specialized for structural support?
a. muscle tissue b. dense regular connective tissue c. areolar connective tissue d. bone connective tissue
There is a small "bump" or swelling with a hole in it in the medial canthus. This structure is called a lacrimal caruncle. Where would we find another caruncle?
a. on the soft palate b. under the tongue c. in the nasal cavity d. in the duodenum