Endocrine glands differ from exocrine glands because they don't:
A. have a blood supply.
B. have ducts.
C. secrete chemical messengers.
D. have cells.
Answer: B. have ducts.
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Which of the following is the heel bone?
A) talus B) navicular C) calcaneus D) cuboid E) patella
The hypophyseal portal system connects the ________ with the ________
A) anterior pituitary; posterior pituitary B) hypothalamus; thyroid C) pituitary glands; thyroid D) anterior pituitary; hypothalamus E) posterior pituitary; hypothalamus
The plateau in the action potential of cardiac muscle results from the action of ________
A) K+ inflow B) K+ outflow C) slow Ca2+ channels D) Na+ inflow E) fast Ca2+ channels