Air is forced out of the lungs during normal expiration due to _________.
A. contraction of the diaphragm
B. elastic recoil of tissues
C. contraction of bronchioles
D. contraction of the external intercostal muscles
Answer: B. elastic recoil of tissues
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Semen contains all of the following except
A) sperm. B) seminal fluid. C) prostaglandins. D) spermatogonia. E) fibrinogen.
If a post synaptic cell is stimulated to threshold by temporal summation this implies that ________
A) the postsynaptic cell can be influenced by only one presynaptic cell B) the postsynaptic cell is sending frequent action potential C) a presynaptic neuron is sending frequent EPSP D) the presynaptic neuron is sending frequent IPSP
The parasympathetic nervous system has little effect on ____ activity
a. atrial b. AV node c. heart rate d. SA node e. ventricular
Which hormone is produced in bone and regulates bone formation, but also protects against diabetes mellitus?
growth hormone osteocalcin calcitonin leptin