Chapter 16, Problem 1MC

Summary Introduction

To determine:

The major stimulus for release of parathyroid hormone is

(a) hormonal,

(b) humoral,

(c) neural

Answer to Problem 1MC

Solution:

(b) Humoral: The parathyroid hormone is regulated by the rise and fall in the blood calcium level and is blood-borne chemical.

Explanation of Solution

The release of the hormones in the human blood is stimulated by the different chemical stimuli. These stimuli can be humoral, hormonal, or neural. The humoral stimuli stimulate the release of the hormone in response to changes in the blood concentration or any other body fluid. The change in the composition of various substances stimulates the release of the hormones. The parathyroid gland responds to the changes in the calcium level of the blood.

The hormonal stimuli stimulate the release of the hormones in response to the release of other hormones. The neural stimuli are the nerve signals that stimulate the release of the hormones from the endocrine glands.