Which of the following is NOT a function of the tensor tympani and stapedius muscles?
A. Protection of the inner ear against continuous loud sounds
B. Optimization of the state of the inner ear for hearing over certain frequency ranges
C. Reflexive contraction when vocalizing to reduce the loudness of your own voice
D. Protection of the delicate inner ear from sudden intermittent loud sounds
Answer: D
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Select the correct statement about electrolyte absorption.
A) Chlorine ion absorption is coupled to glucose and amino acid transport. B) Potassium moves across the epithelium by active transport. C) If vitamin B is not present, calcium is not absorbed. D) Iron and calcium are absorbed mostly by the duodenum.
Sharon "gets the wind knocked out of her" during a skiing accident in which she attempted a jump and landed hard on her feet before tumbling over. She is conscious but breathing is labored, and she complains of pain and shortness of breath. The first aid-trained ski patrolman that comes to her aid determines that Sharon has no broken bones, nor is CNS injury likely. He places tiny tubes at her
nostrils that blow air (with higher than normal percentage of oxygen) into her nose then places her on the snowmobile, and takes her to the first aid tent. Why is Sharon's breathing labored? How does the high-oxygen air help her condition? What will be an ideal response?
Which is true regarding pyrogens?
A) They can reset the temperature-regulating center in the hypothalamus and raise the body temperature. B) They break down tissue by autolysis, releasing digestive enzymes that first destroy the injured cells and then attack surrounding tissues. C) They act only within one tissue. D) They are particularly sensitive to chemicals released by other body cells or by pathogens. E) They make capillaries more permeable and speed up blood flow through the area within the damaged tissue.
The epiglottis opens the glottis during the swallowing reflex
Indicate whether the statement is true or false