body balance

Question 1

what is homeostasis

Answer 1

homeostasis is the body’s ability to maintain a stable internal condition despite changed to external environment.

Question 2

What are some of the conditions in the body that need to be kept constant?

Answer 2

body temp
blood pH
glucose levels

Question 3

How does the body maintain homeostasis?

Answer 3

through things like negative feedback loop

Question 4

What is a negative feedback loop?

Answer 4

Negative feedback is a regulatory mechanism where the body responds to a stimulus by counteracting it, thus maintaining stability.

Question 5

control center (brain)

Answer 5

receives signal from receptors, processes this info and initiates a response

Question 5

Describe an example of negative feedback.

Answer 5

An example is the regulation of body temperature: when body temperature rises above normal, sweat glands are activated to produce sweat, cooling the body down.

Question 6

stimulus

Answer 6

change that prompts a response

Question 7

receptor

Answer 7

detects the stimulus and sends signals to the controls centre.

Question 8

effector

Answer 8

carries out the response directed by the control centre

Question 9

response

Answer 9

the action taken by the effector to counteract the stimulus.

Question 9

Explain how blood glucose levels are regulated?

Answer 9

blood glucose levels are regulated by the pancreas through the hormones of insulin and glucagon.

Question 10

What is an endocrine gland? What does it secrete?

Answer 10

Endocrine glands secrete hormones straight into the bloodstream.
secrete hormones.

Question 10

What happens in diabetes?

Answer 10

In diabetes, the body’s ability to regulate blood glucose levels is impaired.
in type 1 diabetes the pancreas produces little or no insulin

type 2 diabetes cells become resistant to insulin or the pancreas produces insufficient insulin.

Question 11

What is a positive feedback loop?

Answer 11

positive feedback loop aims to increase the effects of a stimulus (eg childbirth)

Question 12

What is the role of the endocrine system?

Answer 12

to release hormones from endocrine glands into the bloodstream.

endocrine system regulates, controls and coordinates
- Growth and development
- Male and female development
- How your body uses energy
and many other body functions!

Question 13

Name at least three areas that the endocrine system regulate

Answer 13

• growth
• metabolism
  -metabolism

Question 14

What is a hormone? How does it travel in the body?

Answer 14

Chemical messengers that are secreted from glands into the blood and affect cells in another part of the body. they travel through the bloodstream

Question 15

How do hormones recognise which cells are their target cells?

Answer 15

Hormones only work on certain cells called target cells.

The target cells have special receptors that “recognise” the
hormones and allow them to influence that cell.

Question 16

What is the role of the hypothalamus? Where do you find it?

Answer 16

secretes hormones that stimulate or suppress the release of hormones in the pituitary gland. it is located in the brain.

Question 17

Why is the pituitary known as the master gland?

Answer 17

it controls the functions of many of the other endocrine glands

Question 18

an example of endocrine disorder.

Answer 18

HYPOthyroidism