Which of the following is NOT one of the three stimuli that may activate endocrine glands?

• hormonal

• neural

• enzymatic

• humoral

Tropic hormones

• are produced only by the hypothalamus

• stimulate the flight-or-flight response

• stimulate other endocrine glands to secrete hormones

• stimulate prostaglandins

Characteristics of steroid based hormone (select all that apply)

• uses secondary messenger

• is used at the DNA level

• can freely pass through cell membranes

• binds to a receptor outside of the cell

Which of the following statements about the regulation of blood sugar is NOT correct?

• glucagon is secreted in response to high blood glucose levels

• insulin causes a decrease in blood glucose levels

• cells in the body react to insulin by taking in more sugar to be used for cellular respiration

• insulin and glucagon are both secreted by the pancreas

Negative feedback means that an increase in a substance will trigger

• decreased production of that substance

• increased production of that substance

• increased production of other substances

• stopping the production of another substance

One way the endocrine system helps maintain homeostasis is by having

• each gland secrete only one hormone

• two hormones with opposite effects regulate certain body functions

• steroid hormones regulate all important functions

• the pituitary gland regulate all the other glands

Most endocrine glands are stimulated by blood imbalances; this type of stimulus is called

• hormonal

• humoral

• steroid

• neural

Match the correct hormone to the function: triggers egg release from the ovaries

• luteinizing hormone

• parathyroid hormone

• follicle-stimulating hormone

• thyroxine

Match the correct hormone to the function: controls metabolism

• luteinizing hormone

• parathyroid hormone

• follicle-stimulating hormone

• thyroxine

Match the correct hormone to the function: most important regulator of blood calcium levels (activates osteoclast)

• luteinizing hormone

• parathyroid hormone

• follicle-stimulating hormone

• thyroxine