Question 1

Which of the following best describes the primary difference between the nervous system and the endocrine system in terms of signal transmission?

Accepted Answer

The nervous system initiates responses rapidly and acts over short distances, while the endocrine system initiates responses slowly and acts over long distances.

Question 2

A patient presents with an enlarged thyroid gland (goiter). Which of the following is the most likely cause based on endocrine physiology?

Accepted Answer

Hyposecretion of thyroid hormone due to iodine deficiency

Question 3

Which hormone is released in response to low blood calcium levels and acts to increase calcium concentration in the blood?

Accepted Answer

Parathyroid hormone (PTH)

Question 4

Which of the following best explains why steroid hormones have longer-lasting effects compared to water-soluble hormones?

Accepted Answer

Steroid hormones bind to plasma proteins, resulting in a longer half-life in the blood.

Question 5

A patient with diabetes insipidus is most likely to have a deficiency in which hormone, and what is the primary effect?

Accepted Answer

Deficiency of antidiuretic hormone (ADH), resulting in increased urine output

Question 6

Which of the following hormones is NOT a tropic hormone released by the anterior pituitary?

Accepted Answer

Growth hormone (GH)

Question 7

A patient with hypersecretion of growth hormone after epiphyseal plate closure will most likely develop which condition?

Accepted Answer

Acromegaly

Question 8

Which of the following best describes the mechanism of action for water-soluble hormones?

Accepted Answer

They bind to plasma membrane receptors and activate second-messenger systems.

Question 9

Which hormone is released by the adrenal cortex in response to ACTH and is responsible for increasing blood glucose levels during stress?

Accepted Answer

Cortisol

Question 10

A patient with hyperparathyroidism is at risk for which of the following complications?

Accepted Answer

Softening and deformation of bones, kidney stones, and depression of the nervous system

Question 11

Which of the following is a correct sequence for the regulation of thyroid hormone release?

Accepted Answer

Hypothalamus releases TRH → Anterior pituitary releases TSH → Thyroid gland releases thyroid hormones

Question 12

Which hormone is secreted by the pancreas in response to low blood glucose and acts to increase blood glucose levels?

Accepted Answer

Glucagon

Question 13

A patient with untreated diabetes mellitus is likely to experience which of the following metabolic consequences?

Accepted Answer

Lipidemia, ketone body formation, and ketoacidosis

Question 14

Which hormone is released by the heart and acts to decrease blood pressure by blocking renin and aldosterone secretion?

Accepted Answer

Atrial natriuretic peptide (ANP)

Question 15

Which of the following is a correct description of the permissiveness interaction between hormones?

Accepted Answer

One hormone cannot exert its effects without another hormone being present.

Question 16

Which hormone is primarily responsible for stimulating milk production in females?

Accepted Answer

Prolactin (PRL)

Question 17

Which of the following best describes the effect of melatonin secreted by the pineal gland?

Accepted Answer

Regulates sleep/wake cycles and acts as an antioxidant

Question 18

Which hormone is released by the adrenal medulla and is responsible for the 'fight-or-flight' response?

Accepted Answer

Epinephrine

Question 19

A patient with hyperinsulinism is most likely to experience which of the following symptoms?

Accepted Answer

Hypoglycemia, anxiety, and disorientation

The Endocrine System: Structure, Function, and Clinical Aspects

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