Which term refers to the period of time during a cardiac cycle when contraction of a chamber occurs and pressure within the chamber rises?
a) filling
b) systole
c) repolarization
d) diastole
e) fibrillation
b
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Proteins entering the stomach act as a buffer raising pH. Rising pH stimulates the activity of G-cells in the lining of the stomach. All of the following but one will occur. Select the statement below that would not occur
A) More stomach acid will be produced and secreted. B) A positive feedback response will be initiated and G-cell activity will continue to go up. C) Protein digestion will be enhanced. D) Digestive enzymes will be released.
Answer the following statements true (T) or false (F)
1. The hormone oxytocin produces its effects on only about half the population. 2. The hypothalamus produces only two hormones, ADH and oxytocin. 3. The hypothalamus produces only two hormones with target organs outside the head, ADH and oxytocin. 4. The target cells for T4 are virtually all cells in the body. 5. The target cells for aldosterone are in the liver.
T lymphocytes mature in the thymus in response to
A) thymosins. B) interferon. C) cytokines. D) antibodies.
Which cellular element has the lowest count in the blood?
a. platelets. b. neutrophils. c. erythrocytes. d. basophils. e. eosinophils.