In response to hemorrhage, there is
A) peripheral vasodilation.
B) increased parasympathetic stimulation of the heart.
C) mobilization of the venous reserve.
D) constriction of elastic arteries to maintain blood pressure.
E) increased blood flow to the digestive system.
C
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Infection from ____________________ is spread through the bites of fleas, tick, mites, and lice.?
Fill in the blank(s) with correct word
Define baroreceptors. Where are baroreceptors located within the body?
A) Baroreceptors are thermoreceptors that detect changes in temperature. They are primarily located in the skin and hypothalamus. B) Baroreceptors are stretch receptors that detect changes in pressure. They are located along the digestive tract, within the walls of the urinary bladder, in the carotid and aortic sinuses, and in the lungs. C) Baroreceptors are chemoreceptors that detect changes in oxygen and carbon dioxide concentrations. They are located within the medulla oblongata and in the carotid and aortic bodies. D) Baroreceptors are nociceptors that detect pain. They are located throughout the somatic and visceral systems of the body. E) Baroreceptors are chemoreceptors that detect changes in pH. They are located within the medulla oblongata and in the carotid and aortic bodies.
In the sympathetic nervous system, where are the preganglionic neurons located?
A) cervical and sacral segments of the spinal cord B) sacral segments of the spinal cord C) brain stem D) thoracic and lumbar segments of the spinal cord E) cerebellum
Which of the following is NOT true about astrocytes?
A. They can wall off an injury site to prevent spread of inflammation. B. They can prevent toxic substances from entering brain tissue. C. They can release chemicals that promote formation of synapses. D. They can aid in the regeneration of injured neurons.