Compare peristalsis and segmentation
What will be an ideal response?
Peristalsis occurs in the esophagus and is controlled by the swallowing center of the brainstem. Peristalsis contractions in the stomach function in gastric mixing and emptying. These movements are controlled by local reflexes associated with distension and content of the stomach, chemical signals including CCK and gastrin, and emotions. In the small intestines segmentation mixes and propels chyme. It is initiated by autorhythmic activity and regulated by local and intrinsic nerve input as well as GI hormones.
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While playing football, Ramón is tackled hard, and as he tries to get up, he finds that he has difficulty flexing and adducting his left thigh and extending his left leg. Which nerve innervating the lower limb may be damaged, and how would the damage affect sensory perception in Ramón's left leg?
All x-rays should include a left and a right marker
Indicate whether the statement is true or false
Which organelle is a small vesicle containing oxidative enzymes?
A. Nucleolus B. Peroxisome C. Golgi apparatus D. Endoplasmic reticulum E. Flagellum
The neurons bringing in sensory information to the central nervous system are
A. afferent neurons. B. efferent neurons. C. motor neurons. D. a and c E. b and c