What does it mean if you have a crush on someone and want to have sex?

Select the correct answer from each drop-down menu anne has a endocrine system disease. choose the correct way to complete each sentence

In which way does nicotine cause addiction? by stimulating the brain’s pleasure center by increasing blood-sugar levels by decreasing dopamine levels by reducing depression and anxiety

Which of the following is the definition of ventilation as it relates to the respiratory system?