The illness characterized by shortness of breath resulting from loss of respiratory membrane surface for gas exchange is
A) emphysema.
B) asthma.
C) lung cancer.
D) pneumonia.
E) cystic fibrosis.
A) emphysema
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As a result of the long refractory period in the contractile cell, cardiac muscle can NOT exhibit:
A) oxygen debt. B) tetany. C) treppe. D) fatigue.
The external genitalia of a female are also known as the ________
A) clitoris B) vestibule C) vulva D) perineum
Which of the organs listed below is not directly innervated by the autonomic nervous system?
A. the heart B. sweat gland C. smooth muscle D. skeletal muscle E. salivary gland
which describes the action of the diaphragm when it contracts?
a) during expiration, it elevates the floor of thorax b) during inspiration, it elevates and protracts the ribs c) during expiration, it depresses and retracts the ribs d) during inspiration, it depresses the floor of thorax