The endocrine system a. works quickly to cause a change. b. once it starts worki

Question

The endocrine system a. works quickly to cause a change. b. once it starts working, does not shut off quickly. c. sends out hormones through ducts to the target region. d. a and b. The secretion of hormones is regulated by what signals? a. chemical changes in the blood stream b. secretions from integumentary glands c. actin and myocin in muscle cells d. bacteria in the large intestine Which of the following statements is correct? a. Circulating hormones are hormones that act on the same cell that secreted them. b. Paracrines are hormones that pass from the interstitial fluid to the blood. c. Local hormones are hormones that can work on the same cell that secreted them. d. Autocrines are hormones that act on other cells of the body. A paracrine hormone can also be a a. circulating hormone. b. local hormone. c. an autocrine. d. None of the above. What happens to hormones once they are inactivated? a. They are reabsorbed into the cells that secreted them. b. They are broken down by enzymes in the digestive tract. c. They are absorbed by the cells they activate. d. The liver breaks them down. What do cAMP, calcium ions, and adeylate cyclase have in common? a. They are all hormones that can pass through the cell membrane. b. They are all receptor proteins on the cell membrane. c. The are all second messengers. d. They do not have anything in common. Which of the following statements is true of protein hormones? a. They can pass through the cell membrane. b. They can be taken orally. c. They can be absorbed across the small intestine.

Explanation / Answer

1 A ) C is the right answer endocrine glands secreates the hormones out to the target sites by using ducts.

2 A ) B instead of using nerves to transmit information, the endocrine system uses blood vessels to deliver hormones to cells.

3 A ) A

4 A ) B

5 A ) B

6 A ) C

7 A ) C

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