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Hormones and Homeostasis

In this worksheet, students study how hormones help animals and plants to maintain a steady environment (homeostasis) and the role they play in regulating organisms.

'Hormones and Homeostasis' worksheet

Key stage:  KS 4

Curriculum topic:  Biology: Coordination and Control

Curriculum subtopic:  Homeostasis

Difficulty level:  

down

Worksheet Overview

QUESTION 1 of 10

Our body needs to maintain a steady internal environment through a regulation process called homeostasis. Homeostasis takes place all the time and regulates levels of oxygen, water, carbon dioxide, glucose and the body's temperature. Have you ever noticed how worried people get when someone has high temperature? This is because, if body temperature exceeds the normal 37°C, especially when it gets above 40°, there is a real danger we may die. 

 

Sweating is a way our body uses to cool down. Also, when we are hot, more blood flows near the surface of the skin to help it lose heat. Hypothermia is when the body temperature drops a lot below the normal one. In the news, we sometimes hear about people who have been trapped or lost in cold, snowy mountains and have died of hypothermia. When we are cold, our body shivers to create a bit of heat. 

 

Hormones are special chemicals produced in glands that help the body regulate different processes. Diabetes, for example, is a condition where the body does not produce enough of the hormone insulin and, therefore, cannot regulate glucose levels in the blood. Diabetics have to inject themselves with insulin.

 

The body also produces sex hormones, which regulate changes during puberty, the menstrual cycle (in girls and women) and reproduction. Ovaries in females produce oestrogen and progesterone, whereas testes in males produce testosterone.

 

Hormones also regulate various processes in plants, like growth of shoots, roots and flowers and ripening of fruit. The most important hormone in plants is auxin

Our body has an internal control system; what is it called?

bones

homeostasis

insulin

Tick the options that show two of the body's ways to keep a constant temperature when it is hot.

sweating

exercising

more blood flows near the surface of the skin

shivering

Tick the options that show two of the body's ways to keep a constant temperature when it is cold.

sweating

exercising

less blood flows near the surface of the skin

shivering

What do we need to do prevent dehydration on hot, sunny days?

exercise

shiver

drink plenty of water

Where are hormones produced?

stomach

arteries

glands

What is the name of the hormones that control changes that happen during puberty and the menstrual cycle?

control hormones

sex hormones

menstrual hormones

The male sex hormone is produced in the testes. What is it called?


 

The graph shows how the levels of the female sex hormones change during the menstrual cycle. Tick two statements that describe correctly what the graph shows.

If the egg is not fertilised, progesterone levels decrease and the lining of the uterus breaks down.

Ovulation happens on day 4.

After an egg is released the lining of the uterus becomes thicker in case the egg is fertilised.

Women bleed when the thickness of the lining is maintained.

A plant hormone is made in the tip of a shoot. The hormone moves towards and collects in the shady side a shoot. It causes the cells there to elongate (grow longer) more than the cells on the light side. This causes the plant shoots to move towards the light. What is the name of the hormone?

chlorophyll

auxin

austin

What processes do plant hormones regulate? Tick two boxes.

root growth

harvesting

fruit ripening

seed dispersal

  • Question 1

Our body has an internal control system; what is it called?

CORRECT ANSWER
homeostasis
EDDIE SAYS
Our body has an internal control system called homeostasis.
  • Question 2

Tick the options that show two of the body's ways to keep a constant temperature when it is hot.

CORRECT ANSWER
sweating
more blood flows near the surface of the skin
EDDIE SAYS
When our body temperature rises we start sweating, and more blood flows near the surface of the skin to reduce the temperature.
  • Question 3

Tick the options that show two of the body's ways to keep a constant temperature when it is cold.

CORRECT ANSWER
less blood flows near the surface of the skin
shivering
EDDIE SAYS
When our body temperature drops we start shivering and less blood flows near the surface of the skin to increase the temperature. Exercising also increases body temperature but, as you know, it does not happen automatically; we have to put the effort!
  • Question 4

What do we need to do prevent dehydration on hot, sunny days?

CORRECT ANSWER
drink plenty of water
EDDIE SAYS
Dehydration is a condition where water levels in the body drop significantly. One needs to drink plenty of water to maintain constant water levels.
  • Question 5

Where are hormones produced?

CORRECT ANSWER
glands
EDDIE SAYS
Hormones are chemicals produced in special glands.
  • Question 6

What is the name of the hormones that control changes that happen during puberty and the menstrual cycle?

CORRECT ANSWER
sex hormones
EDDIE SAYS
Sex hormones control changes that take place during puberty, the menstrual cycle as well as reproduction.
  • Question 7

The male sex hormone is produced in the testes. What is it called?

CORRECT ANSWER
testosterone
EDDIE SAYS
The male sex hormone produced in the testes is called testosterone.
  • Question 8


 

The graph shows how the levels of the female sex hormones change during the menstrual cycle. Tick two statements that describe correctly what the graph shows.

CORRECT ANSWER
If the egg is not fertilised, progesterone levels decrease and the lining of the uterus breaks down.
After an egg is released the lining of the uterus becomes thicker in case the egg is fertilised.
EDDIE SAYS
Ovulation (egg release) is controlled by oestrogen and progesterone. After an egg is released, the lining of the uterus becomes thicker so that the egg can implant in it, if it is fertilised. If the egg is not fertilised progesterone decreases and the uterus lining breaks down in the form of blood; we call this menstruation.
  • Question 9

A plant hormone is made in the tip of a shoot. The hormone moves towards and collects in the shady side a shoot. It causes the cells there to elongate (grow longer) more than the cells on the light side. This causes the plant shoots to move towards the light. What is the name of the hormone?

CORRECT ANSWER
auxin
EDDIE SAYS
Auxin is a plant hormone made in the tip of a shoot. The hormone moves towards and collects in the shady side a shoot. It causes the cells there to elongate (grow longer) more than the cells on the light side. This causes the plant shoots to move towards the light.
  • Question 10

What processes do plant hormones regulate? Tick two boxes.

CORRECT ANSWER
root growth
fruit ripening
EDDIE SAYS
Hormones regulate root growth and fruit ripening amongst other processes.
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