The presence of ____ keeps blood from backflowing in the heart
a. atria
b. ventricles
c. valves
d. septa
c
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The parasympathetic system differs from the sympathetic system by:
A. exiting the CNS at spinal cord levels B. having a two-neuron motor pathway C. having preganglionic cell bodies located in the CNS D. having short postganglionic axons
Which of the following describes fenestrated capillaries?
A. They are the most common type of capillary in the body. B. They allow for rapid passage of large molecules such as formed elements in the bone marrow. C. They are found in most organs. D. They are important in organs that engage in absorption or filtration. E. They have no basal lamina.
The nervous system releases hormones at synapses and the endocrine system releases
neurotransmitters into the bloodstream. Indicate whether the statement is true or false
Which of the following hormones is released from the hypothalamus and influences metabolism?
a. CRH b. TSH c. GnRH d. LH e. GH