Response to stress or danger that increases the heart rate and blood pressure, preparing the body to fight or flee: 2. The ‘feel-good’ hormones such as serotonin so you feel less pain:
3. Controls how much sugar is in the blood maintains balance to prevent diabetes:
4. What time you go to sleep and when you usually wake up in the morning:

Response to stress or danger that increases the heart rate and blood pressure, preparing the body to fight or flee: Adrenaline

The ‘feel-good’ hormones such as serotonin so you feel less pain: dopamine

Controls how much sugar is in the blood maintains balance to prevent diabetes: Insuline

What time you go to sleep and when you usually wake up in the morning: Melatonin

parasites can detrimentally affect their host, but also must not allow their host to die before they can complete their life cycle. some parasites have complex life cycles with many different hosts, and have had to find ways of persisting in many different environments during the change from one host to another. ectoparasites live outside the body of the host, and can more easily  disperse, but are  more exposed to predators, parasites, parasitoids. endoparasites live inside the body of the host, and are therefore protected from the outside environment. but they can be  attacked by the host's immune system. they have therefore developed  mechanisms for dispersal such as  complex life cycles.

did you fail the test? xd