Which of the following are mechanisms to prevent food from entering the larynx? (Check all that apply.)
A. Tipping of epiglottis over glottis
B. Movement of the tongue over the inlet to the larynx
C. Closure of the glottis
D. Contraction of the thyroid cartilage, pinching closed the larynx
Ans:
A. Tipping of epiglottis over glottis
C. Closure of the glottis
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Gingko should be used with caution in patients with a history of:
a. Depression b. Bleeding disorders c. Schizophrenia
In Guillain-Barre syndrome, the immune system attacks and degrades the myelin sheath of PNS axons. Predict the effect this will have on nerve impulse and motor function.
A. Motor signals will not be sent from the brain down the efferent pathway because the brain cannot generate them. B. Lost insulation from myelin will cause neurons of the PNS to be hyper-excitable and muscular spasms will result. C. The brain will slowly degrade and various brain functions will be lost, including motor functions. D. Lost insulation from myelin will cause neurons of the PNS to lose saltatory conduction, resulting in poor muscle function.
The cellular uptake of large particulate substances and macromolecules is called endocytosis.
Answer the following statement true (T) or false (F)
Which of the following is NOT true of Meissner's corpuscles?
A. They are most abundant in the hypodermis. B. They are stimulated by light touch. C. They are also called tactile corpuscles. D. They are numerous in the hands, feet, joints, and external genital organs. E. All of these are true of Meissner's corpuscles.