Which is incorrect about smallpox?
A. The poxvirus called variola is the etiological agent.
B. The vaccine is effective even if given in the first few days after exposure.
C. There is an effective vaccine.
D. The last case was seen in 1977.
E. Transmission is by ingesting contaminated water or food.
Answer: E
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The hormones epinephrine and norepinephrine constitute the "alarm" response of the body to stress. What secretes these hormones?
A. pancreas B. thyroid gland C. adrenal medulla D. pineal gland E. anterior pituitary gland
Sponges can reproduce both sexually and asexually
Indicate whether the statement is true or false
In mammals, the contraction of the muscular expands the chest, pulling air into the lungs.
A. chest cavity B. rib cage C. trachea D. diaphragm E. sternum
Which of the following hormones stimulates uterine contractions during the birth process in mammals?
A. oxytocin B. chorionic gonadotropin C. FHS D. LH E. testosterone