How does the integumentary system contribute to osteoporosis?
A. Lack of exposure to sunlight reduces vitamin D production and decreases calcium absorption.
B. Calcium ions released from the bones are excreted.
C. Immune cells resist infections and release chemicals that promote tissue repair.
D. Excessive smoking lowers estrogen levels, which increases bone loss.
E. Decreased estrogen levels following menopause contribute to the disease.
A
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A. interferon B. histamine C. defensin D. heparin
The glands posterior to the bladder that provides an alkaline mucous and fructose are the:
a. testes b. seminal vesicles c. prostate d. bulbourethral glands
The term external respiration refers to the entire sequence of events in exchange of O2 and CO2 between the external environment and tissue cells
a. True b. False Indicate whether the statement is true or false
true or false? The point where separation of the DNA occurs is called the replication fork.
a. true b. false