Which of the following labeled structures in the diagram is a site of red blood cell production in adult bones?
a) A
b) B
c) E
d) F
e) G
a
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The spleen is considered a primary lymphatic structure
Indicate whether this statement is true or false.
Which of these combinations represents a convergent pathway in the nervous system?
A) One presynaptic neuron synapses with four postsynaptic neurons. B) One presynaptic neuron synapses with one postsynaptic neuron. C) Three presynaptic neurons synapse with one postsynaptic neuron. D) An afferent neuron synapses with an association neuron. E) Collateral axons from a presynaptic neuron synapse with several postsynaptic neurons.
Which of the following substances is a protease?
A) lipase B) hydrochloric acid C) lactase D) trypsin
Renin hydrolyzes angiotensinogen, which is released from the ________, to form angiotensin I
A) spleen B) liver C) lungs D) kidneys E) heart