Chapter 35, Problem 29A

Summary Introduction

Introduction:

Hormones are called the chemical messengers. With the help of blood the hormones are reaches to the organs and the tissue to maintain their function. There are many types of hormones that are secreted in the body to maintain the processes and function.

Answer to Problem 29A

Correct answer:

The correct answer is option (C) growth hormone and thyroxine.

Explanation of Solution

Explanation/justification for the correct answer:

Option (C) growth hormone and thyroxine. These two hormones are incorrectly paired as both have opposite functions and are even produced by different glands. The growth hormones are secreted by the pituitary gland while the thyroxine is produced by thyroid glands involved in the regulation of metabolic reactions inside the body. So, the correct answer is option (C).

Explanation for incorrect answer:

Option (A) calcitonin and parathyroid hormone. The calcitonin and parathyroid hormones are interrelated. The calcitonin is involved in maintaining the calcium level inside the blood but when the blood calcium level decreases, the parathyroid hormone is produced. So, this is an incorrect option.

Option (B) epinephrine and norepinephrine. Epinephrine and norepinephrine both are neurotransmitters and hormones. The epinephrine affects the heart and norepinephrine affects blood vessels. So, this is an incorrect answer.

Option (D) aldosterone and cortisol. Aldosterone and cortisol both are produced by adrenal glands. The aldosterone can affect the kidney and cortisol is involved in the increase of blood glucose level and reduces inflammation. So, this is an incorrect answer.