$$C_t = C_0$ \times \left(\frac{1}{2}\$$right)^{\frac{t}$${t_{1/2}}}$$

Question 1

Which of the following best describes the primary difference between endocrine and exocrine glands?

Accepted Answer

Endocrine glands produce hormones and lack ducts, while exocrine glands produce nonhormonal substances and have ducts.

Question 2

A patient presents with symptoms of diabetes insipidus. Which hormone deficiency is most likely responsible for this condition?

Accepted Answer

Antidiuretic hormone (ADH)

Question 3

Which of the following hormones is synthesized from cholesterol and is classified as a steroid hormone?

Accepted Answer

Testosterone

Question 4

What is the main mechanism by which water-soluble hormones exert their effects on target cells?

Accepted Answer

Activation of plasma membrane receptors and G protein second messengers

Question 5

Which of the following is an example of a hormone acting via a positive feedback mechanism?

Accepted Answer

Oxytocin release during childbirth

Question 6

A patient with a pituitary tumor is found to have enlarged hands, feet, and facial features. Which hormone is most likely oversecreted?

Accepted Answer

Growth hormone (GH)

Question 7

Which of the following best explains the concept of 'up-regulation' in hormone receptor dynamics?

Accepted Answer

Target cells form more receptors in response to low hormone levels.

Question 8

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

Accepted Answer

Prolactin (PRL)

Question 9

Which of the following equations correctly represents the concept of hormone half-life?

Accepted Answer

$$C_t = C_0$ 	imes \left(\frac{1}{2}\$$right)^{\frac{t}$${t_{1/2}}}$$

Question 10

A patient is experiencing inappropriate lactation, lack of menses, and infertility. Which anterior pituitary hormone is most likely oversecreted?

Accepted Answer

Prolactin (PRL)

Question 11

Which of the following is NOT a function controlled by the endocrine system?

Accepted Answer

Initiation of voluntary muscle contraction

Question 12

Which hormone is released in response to low blood glucose and acts to increase blood glucose levels?

Accepted Answer

Glucagon

Question 13

Which of the following best describes the role of the hypothalamus in endocrine regulation?

Accepted Answer

It secretes releasing and inhibiting hormones that regulate anterior pituitary hormone secretion.

Question 14

Which hormone is released by the posterior pituitary and acts to increase water reabsorption in the kidneys?

Accepted Answer

Antidiuretic hormone (ADH)

Question 15

Which of the following is an example of antagonism in hormone action?

Accepted Answer

Insulin and glucagon having opposite effects on blood glucose levels

Question 16

Which hormone is released in response to thyrotropin-releasing hormone (TRH) from the hypothalamus?

Accepted Answer

Thyroid-stimulating hormone (TSH)

Question 17

Which of the following best describes the effect of growth hormone (GH) on metabolism?

Accepted Answer

It decreases rate of cellular glucose uptake and metabolism (anti-insulin effect).

Question 18

Which hormone is responsible for stimulating the adrenal cortex to release corticosteroids?

Accepted Answer

Adrenocorticotropic hormone (ACTH)

Question 19

Which of the following best explains the concept of permissiveness in hormone action?

Accepted Answer

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

Question 20

Which of the following is a tropic hormone produced by the anterior pituitary?

Accepted Answer

Thyroid-stimulating hormone (TSH)

Chapter 16: The Endocrine System – Human Anatomy & Physiology Study Notes

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