In cardiac muscle cells the release of Ca2+ through L-type Ca2+ channels depolarizes the sarcoplasmic reticulum and inhibits the release of any additional Ca2+ necessary for excitation-contraction coupling
Indicate whether the statement is true or false.
FALSE
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An eleven year old girl has been experiencing very light vaginal bleeding for the past 24 hours. Her mother decides to take her to the doctor. She is concerned because her daughter does not have any symptoms associated with PMS
The doctor runs some tests and notices that the child's primordial follicles are dormant. Why might the girl be bleeding? A) The patient's hymen might no longer be in tact. B) The patient is menstruating. C) The patient has a ruptured graafian follicle. D) The patient has secondary follicles.
Once they have developed surface receptors for a particular antigen, lymphocytes are said to be what?
A. Capped B. Self-tolerant C. Sensitized D. Immunoefficient E. Immunocompetent
Almost half of the body's extracellular fluid is plasma found inside blood vessels
Indicate whether the statement is true or false
Each alveolus is surrounded by a web of blood capillaries supplied by the ________.
A. inferior vena cava B. aorta C. pulmonary artery D. superior vena cava E. pulmonary vein