Which of the following is true regarding endocrine glands? a. They release their secretions into the blood. b. They have an unusually low density of blood capillaries. c. They secrete their products by way of ducts. d. Their secretions may be released onto the body surface.

The correct answer is a. They release their secretions into the blood.

Explanation:

Endocrine glands are responsible for producing/secreting hormones and releasing them directly into the blood from where they travel to tissues and organs throughout the body. Some examples of endocrine glands are the pituitary gland (it regulates homeostasis), the thyroid gland (It helps to regulate growth and metabolism) and the adrenal glands (they perform different functions at the endocrine and nervous level).

a. They release their secretions into the blood

Explanation:

Endocrine glands are glands that release their secretions directly into the blood. They are ductless in nature unlike the exocrine glands, hence they do not secrete their products by way of ducts and they do not release their secretions onto the body surface, but directly into the blood. They do not have an unusually low density of blood capillaries.

Examples of endocrine glands are adrenal glands, pituitary gland, thyroid glands etc.

✿   this landform has a high elevation and a high relief

✿   this landform is a mountain

as the gila monster consumes the eggs or young of the desert cottontail and gambel's quail, thus its main food supply is only accessible for a restricted time duration every year. however, for this, the gila monsters exhibit three adaptations, which elevate their survival rate in the desert condition.  

first, is that they possess huge bodies, and can consume greater concentrations of food during a small period. secondly, they require to feed infrequently as they can accumulate fat in their tails. ultimately, their rate of metabolism is very low, so that they can burn their reservoirs of fat gradually.