BIO291 Quiz

Among the treatments listed in Table 1, which one induced the most rapid onset of full maternal behavior (FMB)?

• A. Oxytocin
  

• B. Tocinoic acid
  

• C. Arginine vasopressin
  

• 1. D. Prostaglandin F2α

According to Table 1, which of the following treatments showed a comparable incidence of full maternal behavior (FMB) to oxytocin during the first hour of observation?

• Tocinoic acid

• Arginine vasopressin

• Luteinizing hormone-releasing hormone
  

• Thyrotropin-releasing hormone

Which of the following treatments resulted in the lowest incidence of full maternal behavior (FMB) during the first hour of observation?

• A. Substance P
  

• B. Neurotensin
  

• C. Prostaglandin F2α
  

• 1. D. Arginine vasopressin

During the second and third observation periods, which treatment showed a significant increase in the incidence of full maternal behavior (FMB)?

• A. Arginine vasopressin
  

• B. Prostaglandin F2α
  

• C. Prolactin
  

• 1. D. 17β-Estradiol

Which of the following treatments resulted in strong partial maternal behavior (SPMB) during the first hour of observation that did not persist during later observation periods?

• A. Prostaglandin F2α
  

• B. Arginine vasopressin
  

• C. Lysine vasopressin
  

• 1. D. Pressinoic acid

Answer explanation

One substance, prostaglandin F2a

(PGF2a,), was exceptional in this regard.

Of 19 animals injected with PGF2o. ten

showed SPMB during the first hour

(P < .002 compared to controls injected

with saline). This effect did not persist;

nine of the ten animals that showed

SPMB during the first hour did not show

it during the final hour of observation

(data not shown).

What is the relationship between the dose of oxytocin and the incidence of full maternal behavior (FMB) in the first hour after injection?

• A. There is a positive correlation, meaning that as the dose of oxytocin increases, the incidence of FMB also increases.
  

• B. There is a negative correlation, meaning that as the dose of oxytocin increases, the incidence of FMB decreases.
  

• C. There is no correlation between the dose of oxytocin and the incidence of FMB.

  
  

Answer explanation

The graph shows a clear positive trend, with higher doses of oxytocin leading to a higher incidence of FMB. This suggests that oxytocin has a dose-dependent effect on maternal behavior, with larger doses being more effective in inducing FMB.

Based on the passage, what is the authors' theory about the relationship between prostaglandin F2α (PGF2α) and oxytocin in the induction of maternal behavior?

• D. PGF2α has no effect on oxytocin or maternal behavior.

• B. PGF2α and oxytocin have mutually reinforcing effects on maternal behavior.
  

• C. PGF2α inhibits the production of oxytocin in the brain.

• D. All of the above

Answer explanation