Answer the following statements true (T) or false (F)
1. Positive feedback mechanisms tend to increase the original stimulus.
2. The anatomical position means the body is standing at attention with the palms facing forward and the thumbs pointing away from the body.
3. The elbow is proximal to the shoulder.
4. The serous membrane that lines the peritoneal cavity wall is called visceral peritoneum.
5. A major function of serous membranes is to decrease friction.
1. TRUE
2. TRUE
3. FALSE
4. FALSE
5. TRUE
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For relaxation to occur,
A. ACh receptors open and Ca++ channels on the sarcoplasmic reticulum close. B. ACh receptors close and Ca++ channels on the sarcoplasmic reticulum open. C. ACh receptors close and Ca++ channels on the sarcoplasmic reticulum close. D. ACh receptors open and Ca++ channels on the sarcoplasmic reticulum open.
Cones are sensitive to light and function in dim light but do not produce color vision
a. True b. False Indicate whether the statement is true or false
Which of the following correctly describes a malignant neoplasm?
A. A neoplasm that remains localized B. A neoplasm in which cells have broken off and traveled to other parts of the body where they are producing more abnormal cells C. A neoplasm that is encapsulated D. A neoplasm that does not metastasize
Much of the digestive system relies on the activity of enzymes. The stomach secretions include an enzyme (pepsin) along with HCl to reduce the pH in the stomach to a pH of 2. When the food moves into the small intestine, there are multiple secretions to
raise the pH to 7. How would this pH change affect the activity of the stomach enzyme, pepsin? A) It would increase the activity of pepsin B) It would denature pepsin. C) There would be no change in the activity of pepsin. D) The active site would be increased.