Question 1

Which of the following best describes the molecular structure of oxytocin?

Accepted Answer

A peptide hormone made of 9 amino acids

Question 2

Oxytocin is primarily released from which part of the pituitary gland?

Accepted Answer

Posterior pituitary

Question 3

During labor, what physiological process leads to the release of oxytocin?

Accepted Answer

Strain on uterine walls sends impulses to the hypothalamus, which signals the pituitary to release oxytocin

Question 4

Which of the following is NOT a primary target tissue for oxytocin?

Accepted Answer

Skeletal muscle

Question 5

A synthetic form of oxytocin is commonly used to induce labor. What is the name of this drug?

Accepted Answer

Pitocin

Question 6

Which of the following hormones is released from the anterior pituitary, NOT the posterior pituitary?

Accepted Answer

Growth hormone

Question 7

Oxytocin is sometimes called the 'cuddle drug' because it is associated with which of the following?

Accepted Answer

Bonding and emotional empathy

Question 8

Which scenario would most likely result in increased oxytocin release?

Accepted Answer

A mother breastfeeding her infant

Question 9

Recent studies suggest oxytocin may play a role in which of the following social behaviors?

Accepted Answer

Sustaining monogamous relationships

Question 10

Which of the following best explains the mechanism by which oxytocin facilitates milk letdown during lactation?

Accepted Answer

Oxytocin stimulates the contraction of breast milk duct smooth muscle

Question 11

Which equation best represents the general structure of a peptide hormone like oxytocin?

Accepted Answer

$$\mathrm{Peptide} = \mathrm{Amino\ Acid}_1 - \mathrm{Amino\ Acid}_2 - \cdots - \mathrm{Amino\ Acid}_n$$

Question 12

A patient with difficulty in social bonding and emotional empathy might benefit from which hormone, according to recent psychiatric research?

Accepted Answer

Oxytocin

Question 13

Which of the following is a correct sequence of events during labor involving oxytocin?

Accepted Answer

Uterine stretch → Hypothalamic signal → Posterior pituitary releases oxytocin → Uterine contraction

Question 14

Which of the following is a plausible effect of oxytocin administration in individuals with autism spectrum disorders?

Accepted Answer

Improved interpersonal relationships

Question 15

Which feedback mechanism is most closely associated with oxytocin release during childbirth?

Accepted Answer

Positive feedback

Question 16

Which of the following best describes the role of oxytocin in prairie voles?

Accepted Answer

It helps sustain monogamous pair bonds

Question 17

Which of the following is a direct physiological effect of oxytocin during breastfeeding?

Accepted Answer

Contraction of breast milk duct smooth muscle

Question 18

Which of the following best explains why oxytocin is considered a peptide rather than a protein?

Accepted Answer

It is composed of only 9 amino acids, which is below the threshold for a protein

Question 19

Which of the following is a correct application of oxytocin in clinical practice?

Accepted Answer

Inducing uterine contractions during labor

Question 20

Which of the following best describes the relationship between oxytocin and emotional empathy in men?

Accepted Answer

Oxytocin increases emotional empathy in men

Oxytocin: Structure, Source, Function, and Clinical Relevance

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