Ch. 13 Exam

Bone !!

Calcitonin exerts its effect on which organ?

Zona fasciculata

During a time of stress, which layer of the adrenal cortex would you expect to be the most active?

Grave's disease

Hypersecretion of thyroid hormone may result in which disorder?

activating enzymes outside a cell

Protein- based hormones exert their effects by

pass through the cell wall and bind with receptors in the nucleus of the cell.

Steroid hormones =

pituitary gland

The endocrine gland that influences more body processes than any other endocrine gland is the _____________.

melatonin

The pineal gland secretes

A cascade of processes that influence a cell's response to a hormone

What is a second messenger system?

Negative feedback

What is the mechanism whereby one endocrine gland stimulates another endocrine gland to secrete a hormone, which, in turn, causes the first endocrine gland to stop production of its hormone?

Between meals, when blood glucose levels fall, glucagon stimulates liver cells to convert glycogen into glucose

What occurs between meals when blood sugar levels decline?

The thyroid gland to release calcitonin

What would you expect to occur in response to increasing blood levels of calcium?

Beta cells

Which cells secrete the hormone insulin?

Thymus

Which gland is part of both the endocrine and immune system?

Thyrotropin

Which hormone is secreted by the thyroid gland?

The excretion of calcium in the intestines

Which of the following is one of the effects of parathyroid hormone?

It consists of three layers, each of which secretes a different corticosteroid.

Which of the following statements about the adrenal cortex is correct?

Endocrine glands are ductless glands that secrete their hormone into the bloodstream.

Which of the following statements about the endocrine system is true?

It secretes digestive enzymes into the small intestine

Which of the following statements about the pancreas is correct?

They aid in the repair of damaged tissue.

Which statement about glucocorticoids is correct?

It releases its hormones into a system of blood vessels called the hypophyseal portal system.

Which statement about the anterior pituitary is correct?