Year 9 Science · Unit 1 · Lesson 3

How Multiple Systems Interact for Homeostasis

Foundation Worksheet

Name

Date

Class

Learning Goals

Name what each of the four systems supplies or removes
Say what stops working, and in which other system, if one is removed
Tell a nervous response from an endocrine one by its speed and duration

Warm Up

Sort it!

Write each item from the pool into the correct system box. Some items describe a contribution to homeostasis, each belongs in exactly one system category.

takes oxygen in and lets carbon dioxide out carries oxygen, glucose, heat and waste between the other systems breaks food into molecules small enough to enter the blood removes urea, excess water and excess salts through the kidneys without it, urea builds up in the blood until it poisons cells without it, oxygen sits in the lungs and never reaches a muscle without it, cells run out of oxygen within minutes without it, there is nothing for circulation to deliver

Respiration

Circulation

Digestion

Waste removal

Your Turn

True or False? Fix the false ones

Circle T or F for each statement. If the statement is false, rewrite it correctly on the line below.

Removing the digestive system would affect only digestion, and no other system.

Correct it:

A nerve impulse is fast, short-lived and aimed at a specific effector, while a hormone is slower, longer-lasting and reaches the whole body.

Correct it:

Exercise requires multiple body systems to cooperate simultaneously to help maintain homeostasis.

Correct it:

If one body system is disrupted, stable internal conditions can become harder to maintain across the whole organism.

Correct it:

Show What You Know

1. Name the four body systems discussed in this lesson. For each one, describe in one sentence the role it plays in supporting homeostasis.

Recall 4 marks

Wrap Up

In one sentence, what was the main idea of this lesson?