Sophia - Human Biology - Unit 5- Practice-5-Challenge 3. About how long is a typical menstrual cycle? 30-31 days 5-7 days 21 days 28 days CONCEPT Ovarian Cycle and Menstrual Cycle 3 Some hormones don't enter the cell, so they depend on __________ to effect changes in the cell. enzymes steroid hormones 8/20/2021 Sophia :: Welcome secondary messengers non-steroid hormones CONCEPT Steroid and Non-Steroid Hormones 4 What carries food from the mouth to the stomach? Large intestine...

Sophia - Human Biology - Unit 5 Challenge 3. 1 — Fertilization and Early Development Understand the process of fertilization and the earliest human developments. What body part develops from the ectoderm? • a.) Bladder • b.) Muscle • c.) Pituitary gland • d.) Heart 2 — Implantation Determine the process of implantation. Which of the following statements about ectopic pregnancy is true? • a.) Menstruation occurs and the fertilized egg is expelled from the uterus. • b...