Human chorionic gonadotropin (hCG) is produced by the
a) placenta.
b) ovaries.
c) testes.
d) pituitary gland.
e) hypothalamus.
a
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When a nerve impulse reaches the transmissive segment of a neuron,
A. calcium is pumped into the neuron and neurotransmitter diffuses out through channels. B. calcium is released from the neuron along with neurotransmitter from synaptic vesicles. C. calcium diffuses into the neuron and neurotransmitter is released by exocytosis. D. calcium and neurotransmitter diffuse into the synaptic knob. E. calcium is immediately pumped out of the neuron and vesicles of neurotransmitter undergo phagocytosis.
What sends information to the respiratory centers in the medulla oblongata concerning pH, CO2, and O2?
A. The pontine respiratory group in the pons B. The peripheral chemoreceptors in the aortic arch and carotid arteries and central chemoreceptors in the medulla oblongata C. None of these are correct. D. Both of these answers are correct.
Chyle is delivered to the blood via the lymphatic system
Indicate whether the statement is true or false
Which of the following is not a consideration for selecting a disinfectant?
a. toxic affects c. name of product b. surface type d. contact time