If the length of the absolute refractory period in cardiac muscle cells was the same as it is for skeletal muscle cells ________.
A) it would be much longer before cardiac cells could respond to a second stimulation
B) contractions would last as long as the refractory period
C) tetanic contractions might occur, which would stop the heart's pumping action
D) it would be less than 1?2 ms
C) tetanic contractions might occur, which would stop the heart's pumping action
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Prolonged thyroid hyposecretion leads to ________, a condition characterized by weight gain, slow metabolism, and tissue swelling.
Fill in the blank(s) with the appropriate word(s).
The membrane that lines the lumenal surfaces of the digestive, respiratory, urinary, and reproductive tracts consists of ________.
A. simple squamous epithelium and dense irregular connective tissue B. epithelium and lamina propria C. simple squamous epithelium and areolar tissue D. areolar and dense irregular connective tissue E. areolar tissue and lamina propria
The pons and cerebellum arise from which secondary embryonic vesicle?
A. Diencephalon B. Metencephalon C. Myelencephalon D. Mesencephalon E. Telencephalon
____________________ refers to paralysis of the legs resulting from lower spinal cord injury
Fill in the blank(s) with correct word