Tim is overweight. his physician has decided to test him to see if there is a problem with the regulation of his metabolism. which endocrine gland will be the focus of diagnostic testing? a. adrenal b. thymus c. thyroid d. pancreas e. pituitary

C. Thyroid

Explanation:

The thyroid gland is an endocrine gland in the human body and serves to secrete thyroxine (T4), triiodothyronine (T3) and calcitonin hormones. T3 and T4 are iodinated amino acid derivatives and target the body cells to increase the metabolic rate.  

Thyroxine (T4), triiodothyronine (T3) from the thyroid gland stimulate all body cells to increase the rate of breakdown of glucose by cellular respiration and to release more and more energy to perform various functions.  

When these two hormones are not secreted in an adequate amount, the metabolic rate of the body is reduced which in turn leads to weight gain. Therefore, the thyroid gland and its secretions are checked in an overweight person to confirm the cause of the weight gain.  

glacial erosion, the picking up and movement of earth beneath a glacier, is also referred to as plucking. erosion and transportation of individual pieces of bedrock, especially large "joint block occur as a result of this glacial erosion. plucking is type of erosion in which rocks become frozen into the bottom and sides of the glacier.as the glacier moves downhill it 'plucks' the rocks frozen into the glacier from the ground.

the law of original horizontality explains:   why rocks appear in layers. correct answer: b the law suggests that all rock layers are originally laid down (deposited) horizontally and can later be deformed.   the principle is used by geologists to make assumptions about the relative ages of sedimentary rocks.