Question

Pick the statement below that is most accurate about hormones ?

1. Hormones travel through the bloodstream to reach their target

2. Hormones are released by cells in direct contact with their target cell.

3. Hormones are released into cerebrospinal fluid to affect specific regions in the brain

4. Hormones can act on any cell that is exposed to that hormone

Which of the following hormones affects the majority of body cells?

1. Thyroxine

2. Aldosterone

3. Gonadocorticoids

4. Parathyroid hormone

A new hormone is identified that is produced by the anterior pituitary gland that acts on receptors on cells in the adrenal medulla. This hormone is most likely a  

1. Tropic hormone

2. Water soluble hormone

3. Lipid soluble hormone

4. Also a neurotransmitter

Answer 1

Answer

1. Option A) Hormones travel through the bloodstream to reach their target

• Hormones are released by endocrine glands.
• Endocrine glands are ductless. They directly secrete hormone into the bloodstream.
• Hence, hormones travel through bloodstream.

2. Option A) Thyroxine

• Thyroid hormones functions to regulate basal metabolic rate, helps in protein synthesis, regulate cardiac contractions and heart rate.
• Majority of all the cells in the body are ffected by thyroxine.

3. Option A) Tropic hormone

• Tropic hormone are hormones that target another endocrine gland.
• Anterior pituitary releases 4 tropic hormones that causes release of hormones from other endocrine glands.