Chapter 13 Endocrine System Verified Answers
1. What type of glands produce hormones? - Answer: Endocrine glands.
2. Which glands are known for producing "juices"? - Answer: Exocrine glands.
3. What type of glands are considered ductless? - Answer: Endocrine glands.
4. Through which b...
4. Through which bodily fluid do hormones circulate?
- Answer: Hormones travel through the blood.
5. What does it mean for a hormone to have a target cell?
- Answer: A hormone's target cell refers to specific cells that the hormone acts upon.
6. Identify and describe the locations of the principal endocrine glands:
- Hypothalamus: Located in the brain.
- Pituitary Gland: Situated in the brain, below the hypothalamus.
- Thyroid Gland: Found in the throat.
- Parathyroid Glands: Four oval-shaped glands located on the back of the thyroid.
- Thymus Gland: Located in the upper chest region.
- Pineal Gland: Positioned in the brain, behind the hypothalamus.
- Adrenal Glands: Located above the kidneys.
- Pancreas: Found in front of the kidneys and behind the stomach.
- Gonads: Located in the reproductive system.
, 7. What is the sequence of events involved in the action of steroid hormones?
- Answer:
1. Endocrine glands secrete steroid hormones.
2. These hormones are transported by bodily fluids to their target cells.
3. The hormone molecules bind with specific receptors on the target cell membranes.
4. This binding facilitates the movement of hormones into the target cells through a series of
reactions involving receptors and enzymes.
8. Describe the three feedback mechanisms that usually regulate hormone secretions:
- Answer:
1. Negative Feedback: A major example is the regulation of blood sugar and insulin levels.
2. Positive Feedback: One example is blood clotting and increased estrogen production during
pregnancy.
3. Nerve Control: This includes the adrenal gland and the releasing hormones from the hypothalamus.
9. What are the two distinct sections of the pituitary gland?
- Answer: The anterior lobe and posterior lobe.
10. Which lobe of the pituitary gland contains cells stimulated by releasing hormones from the
hypothalamus to secrete their own hormones?
- Answer: The anterior lobe.
11. Which pituitary lobe contains the ends of neurosecretory cells from the hypothalamus that secrete
hormones directly into the bloodstream?
- Answer: The posterior lobe.
12. Name six hormones released by the anterior pituitary:
- Answer:
1. Somatotrophs - Growth Hormone (GH)
2. Mammatropes - Prolactin (PRL)
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