The stretch reflex differs from the withdrawal reflex in that
a. activation of the afferent results only in excitatory reflex responses in the former case, but in both excitatory and inhibitory responses in the latter case.
b. the former is monosynaptic and the latter is polysynaptic.
c. the motor neurons associated with the former directly stimulate muscle stretching while those associated with the latter cause muscle contraction.
d. two of these.
e. all of these.
D
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Why are there a large number of lymphatic vessels associated with the small intestine?
What will be an ideal response?
One of the major functions of the large intestine is to
A. convert chyme to feces. B. regulate the release of bile. C. produce vitamin C. D. break down hemoglobin to release bilirubin.
About 95% of the bile salts secreted by the liver is recycled back to the liver by the enterohepatic circulation
Indicate whether the statement is true or false.
Which of the following is a function of the pigmented layer of the retina?
A) provide eye color B) house the photoreceptors C) secrete vitreous humor D) absorb light passing through the neural layer E) refract light onto the photoreceptors