Health Questions Regarding the Ordained

Below, I have questions regarding Buddhist monasticism. They are centered around topics of health. 1. May a monastic regulate their alms diet in order to focus on healthy foods and avoid unhealthy ones? 2. Would it be appropriate for a monastic to physically exercise to keep healthy? 3. Do monastics have access to healthcare for dental & physical checkups as well as brush their teeth, cut their nails, etc.? Thank you for your time and may you be well.