Question

1. how do hormones know which cell to have an impact on? a) all hormones effect all cells, no matter what b) hormones only effect the cells located by the endocrine gland, having a direct impact once secreted from the gland c) the hormone must fit into the receptor protein found on or inside the cell d) target cells/organs move to the location of the endocrine gland so the hormone can work 6. the entire purpose of the endocrine system is to maintain... a) sensory input from environment b) protection using reflexes c) homeostasis of body with environment d) immune support against pathogens 7. the endocrine system is regulated by... a) the nervous system only b) there is no regulation c) negative feedback mechanism d) the cerebellum and cerebrum

Explanation:

• For question 5: Hormones act on specific target cells. They bind to receptor proteins on or inside the target cells, similar to a key - lock mechanism.
• For question 6: The endocrine system releases hormones to keep the body's internal environment stable, which is homeostasis.
• For question 7: The endocrine system is mainly regulated by negative feedback mechanisms. When hormone levels reach a certain point, the system inhibits further hormone production.

Answer:

1. c) The hormone must fit into the receptor protein found on or inside the cell
2. c) Homeostasis of body with environment
3. c) Negative feedback mechanism