Considering the role of the chemoreceptor in the regulation of the respiration rate, the most important stimulus that induces changes in ventilation is:
A) partial pressure of oxygen (PO2 ) in pulmonary capillaries.
B) partial pressure of oxygen (PO2 ) in systemic capillaries.
C) partial pressure of carbon dioxide (PCO2 ) in arterial blood.
D) partial pressure of oxygen (PO2 ) in venous blood.
Answer: C
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Gastric chief cells secrete pepsin.
Answer the following statement true (T) or false (F)
In temporal summation, a single presynaptic neuron stimulates the creation of action potentials in a postsynaptic neuron when it
a) stops firing long enough to allow the postsynaptic neuron to recover. b) fires at a fast enough rate that the sum of EPSPs in the postsynaptic neuron moves above threshold. c) fires at a steady rate that allows the postsynaptic neuron to return to resting potential. d) recruits other presynaptic neurons to begin to fire. e) runs out of neurotransmitter.
Summarize the five primary taste sensations
What will be an ideal response?
The junction of a neuron with another cell is a/an ________.
A. effector B. receptor C. ganglion D. synapse