ENDOCRINE SYSTEM
ADRENAL
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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____ is a chemical substance, produced by a gland and carried in the bloodstream, which alters the activity of specific target organs.
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____ mechanism is an important type of control that is found in homeostasis. It responds when conditions change from the ideal or set point and returns conditions to this set point. There is a continuous cycle of events in this.
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____ is produced by the thyroid gland, which stimulates the basal metabolic rate. It controls the speed at which oxygen and food products react to release energy for the body to use.
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____ is produced by the adrenal glands in times of fear or stress. It targets vital organs, increases the heart rate and boosts the delivery of oxygen and glucose to the brain and muscles.
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Detailed explanation-1: -(HOR-mone) One of many substances made by glands in the body. Hormones circulate in the bloodstream and control the actions of certain cells or organs. Some hormones can also be made in the laboratory.
Detailed explanation-2: -The classical definition of hormone as a chemical produced by endocrine glands and released into the blood and transported to a distantly located target organ has current scientific definition as follows: Hormones are non-nutrient chemicals which act as intercellular messengers and are produced in trace amounts.
Detailed explanation-3: -Starling’s original definition of a hormone from 1905 was “a hormone is a substance produced by glands with internal secretion, which serve to carry signals through the blood to target organs”.
Detailed explanation-4: -The hormones in the human body are made in specialised tissues called the endocrine glands.