Homeostasis

Question 1

What is homeostasis?

Answer 1

Ways the body maintains its internal environment.

Question 2

Describe the endocrine system

Answer 2

It is a ductless system that uses hormones as messengers. The endocrine glands excrete the hormones directly into the bloodstream to perform on the target organ.

Question 3

What is a negative feedback response?

Answer 3

When the body senses an unbalance, a negative feedback loop kicks in to reduce/cancel out the stimulus to stablize the body. (i.e when glucose levels rise, the negative feedback response is the secretion of insulin to stablize it again.)

Question 4

What are exteroreceptors?

Answer 4

They detect external stimuli. They detect the five senses.

Question 5

Define chemoreceptor

Answer 5

Taste and smell receptors.

Question 6

Define mechanoreceptor

Answer 6

Hearing, touch and pain receptors.

Question 7

Define photoreceptor

Answer 7

Vision receptors.

Question 8

Define thermoreceptor

Answer 8

Temperature receptors.

Question 9

Define interoreceptor

Answer 9

Detects internal states such as blood pressure and chemistry.

Question 10

Order of the negative feedback loop?

Answer 10

1. Stimulus (receptors detect change)
2. Receptors message the control centre
3. Control centre messeges the effectors
4. Effectors perform the correct actions.