Lecture Quiz #6

Which two endocrine glands exert the most control over blood calcium levels? A. thyroid and parathyroid B. anterior pituitary and adrenal cortex C. adrenal cortex and thyroid D. thyroid and ovaries E. parathyroid and anterior pituitary

A. thyroid and parathyroid

A goiter results from low dietary iodine levels... A. because ADH levels rise controllably. B. because thyroxine cannot be made, which results in high levels of TSH. C. due to the activity of the anterior pituitary gland. D. because the hypothalamus cannot be inhibited without iodine. E. as glucagon levels elevate.

B. because thyroxine cannot be made, which results in high levels of TSH.

Which one of the following hormone pairs is antagonistic, in that they have opposing effects? A. estrogen, progesterone B. glucagon, insulin C. epinephrine, norepinephrine D. thyroxine (T4) and triiodothyronine (T3) E. oxytocin, prolactin

B. glucagon, insulin

Insufficient production of growth hormone by the anterior pituitary may result in... A. gigantism. B. a drop in blood glucose levels. C. dwarfism. D. diabetes insipidus. E. acromegaly.

C. dwarfism.

During times of stress, which one of the following glands stimulates the anterior pituitary to release ACTH? A. pancreas B. anterior pituitary C. hypothalamus D. adrenal medulla E. posterior pituitary

C. hypothalamus

Luteinizing hormone is considered a gonadotropin because of which one of the following reasons? A. It triggers the production of gonadotropin hormones. B. It stimulates the growth and development of gonads, but only in females. C. It stimulates the growth but not the development of gonads in males. D. It promotes the growth of reproductive organs in both males and females. E. It functions to complement the activity of TSH.

D. It promotes the growth of reproductive organs in both males and females.

The pituitary gland is often called the "master of the endocrine system" because... A. releasing and inhibiting factors for most other endocrine glands are released by the pituitary. B. all other hormones must be activated by enzymes released by the pituitary gland. C. it contains neuroendocrine cells that activate many of the other endocrine glands. D. it secretes eight different hormones that in turn regulate many of the other endocrine glands. E. all blood vessels must pass through the pituitary so hormones can be regulated.

D. it secretes eight different hormones that in turn regulate many of the other endocrine glands.

Which of the following tissues/organs is NOT a member of the endocrine system? A. thyroid gland B. stomach C. adrenal gland D. salivary gland E. kidney

D. salivary gland