Which of the following symptoms is common following damage to the cerebellum?
A. Spastic paralysis
B. Intention tremors
C. Resting tremors
D. Flaccid paralysis
E. Violent, uncontrolled body movements called chorea
Answer: B
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You've been sitting cross-legged on the floor of your dorm room while studying. As you stand up to go get a snack, you realize that you've lost feeling in one of your feet. A minute later, all feeling is restored. Being a physiology student, you understand that blood flow was occluded during the time that you were sitting, and that blood flow was restored as you stood up. What else is TRUE?
A. The resistance of the blood vessels did not change from sitting to standing, but gravity helped in blood flow. B. High levels of built up CO2 acted as vasoconstrictors in the foot's blood vessels. C. The decreased oxygen content of the foot tissues and the increased levels of metabolic wastes both acted as vasodilators, increasing the flow of blood through the tissues upon standing. D. As you stood, vasoconstriction occurred in the foot's blood vessels to protect them from shock. E. All of these are true.
About 90% of the cells within the CNS are ____
a. neurons b. nerves c. connective tissue d. interneurons e. glial cells
Answer the following statements true (T) or false (F)
1. The major stimulus for production of intestinal fluid is distention or irritation of the intestinal mucosa by hypertonic or acidic chyme. 2. Most nutrients are absorbed through the mucosa of the intestinal villi by active transport. 3. Ionic iron is actively transported into the mucosal cells, where it binds to the protein ferritin, a phenomenon called the mucosal iron barrier. 4. Mumps is an inflammation of the parotid glands caused by myxovirus. 5. Fats significantly delay the emptying of the stomach.
Our understanding of how the human body works is based on a knowledge of which level(s) of organization?
A) chemical level B) cellular level C) molecular level D) tissue level E) Knowledge about each level contributes to our total understanding of how the body works.