Q: Which of the following equations best represents the relationship between hormone concentration and receptor binding strength?

$$[HR] = [H] \times [R] \times K_{a}$$

Question 1

Which of the following best describes the difference between neurotransmitter and hormone signaling in terms of distance and speed?

Accepted Answer

Neurotransmitters act locally and are rapid; hormones act over long distances and are slow.

Question 2

Which of the following is TRUE regarding steroid hormones?

Accepted Answer

They are synthesized from cholesterol and bind to intracellular receptors.

Question 3

A patient presents with excessive urination and dilute urine. Laboratory tests reveal a deficiency in antidiuretic hormone (ADH). Which condition does this most likely indicate?

Accepted Answer

Diabetes insipidus

Question 4

Which hormone is released from the posterior pituitary and is responsible for stimulating uterine contractions during labor?

Accepted Answer

Oxytocin

Question 5

Which of the following best explains the mechanism of action for amino acid-based hormones?

Accepted Answer

They bind to cell surface receptors and often activate second messenger systems such as cAMP.

Question 6

Which hormone is primarily responsible for increasing blood calcium levels in response to low calcium concentration in the blood?

Accepted Answer

Parathyroid hormone (PTH)

Question 7

A patient with a pituitary tumor is found to have elevated growth hormone (GH) levels as an adult. What condition is most likely to develop?

Accepted Answer

Acromegaly

Question 8

Which of the following is a tropic hormone released by the anterior pituitary that stimulates the adrenal cortex?

Accepted Answer

Adrenocorticotropic hormone (ACTH)

Question 9

Which feedback mechanism is most commonly used to regulate hormone levels in the endocrine system?

Accepted Answer

Negative feedback

Question 10

Which of the following best describes the pathway for steroid hormone action?

Accepted Answer

Steroid hormone diffuses through the plasma membrane, binds to an intracellular receptor, and the complex regulates gene transcription.

Question 11

Which hormone is released in response to neural stimuli from sympathetic fibers and is involved in the 'fight or flight' response?

Accepted Answer

Epinephrine

Question 12

Which hormone is responsible for stimulating milk production, and what inhibits its release?

Accepted Answer

Prolactin; dopamine (prolactin-inhibiting hormone)

Question 13

Which of the following is a correct sequence for the hormonal control of the thyroid gland?

Accepted Answer

Hypothalamus releases TRH → Anterior pituitary releases TSH → Thyroid gland releases T3/T4

Question 14

Which of the following equations best represents the relationship between hormone concentration and receptor binding strength?

Accepted Answer

$$[HR] = [H] 	imes [R] 	imes K_{a}$$

Question 15

A patient is found to have low levels of FSH and LH, but high levels of gonadal hormones. Which type of feedback is most likely occurring?

Accepted Answer

Negative feedback

Question 16

Which hormone is released from the hypothalamus and stimulates the anterior pituitary to release ACTH?

Accepted Answer

Corticotropin-releasing hormone (CRH)

Question 17

Which of the following is a direct effect of growth hormone (GH) on metabolism?

Accepted Answer

Encourages use of fat for fuel and raises blood glucose

Question 18

Which hormone is NOT stored in secretory vesicles but is synthesized as needed and binds to intracellular receptors?

Accepted Answer

Steroid hormones

Question 19

A patient with damage to the anterior pituitary is unable to produce ACTH. What is the most likely consequence?

Accepted Answer

Decreased cortisol production by the adrenal cortex

Question 20

Which of the following best describes the role of insulin-like growth factors (IGFs) in growth hormone signaling?

Accepted Answer

IGFs are produced in response to GH and promote uptake of nutrients, DNA synthesis, and bone matrix deposition.

Lecture #16

Guida di studio - Domande di pratica

Study guide - Flashcard