2018 Year 9 Body Systems

Question 1

Where in the human body are hormones produced?

Answer 1

The endocrine glands

Question 2

During digestion, what are proteins broken down into?

Answer 2

Amino acids

Question 3

What are the gaps between neurones called?

Answer 3

Synapses

Question 4

State the 5 functions of the liver.

Answer 4

Breaks down hormones, breaks down haemoglobin (found in dead red blood cells), creates products that are added to bile and disposed through the digestive system, breaks down or modifies toxic substances and most medicines and converts ammonia to urea

Question 5

What is homeostasis and identify substances whose levels are controlled by homeostasis?

Answer 5

Homeostasis is the process of maintaining a constant internal environment. Temperature, water content, available energy, available oxygen and concentration of wastes in the blood are all maintained by homeostasis

Question 6

What is a receptor? Give an example

Answer 6

Receptors are specialised cells that detect stimuli changes

Question 7

What is an effector? Give an example.

Answer 7

Effectors are muscles or glands (tissues that create secret hormones) that translate messages into actions

Question 8

Know the difference between stimulus and response and give an example.

Answer 8

A stimulus is something that provokes a reaction in a muscle or tissue. A response is something that you would do to control the stimulus. For example: being out in the sun with warm clothing on. The sun being hot would be the stimulus and sweat would be an involuntary response from your body. A voluntary response would be to take a layer of clothing off.