Question

What are guard cells used for?

1 year ago

·

1 Reply

·

957 views

S

Sigmund Little


1 Reply

Amanda J Profile Picture

Verified Sherpa Tutor

These are cells found outside the stomata. There are two of them shaped rather like long balloons. They exist in the plants to control gas exchange and water loss. When the plant takes in lots of water via osmosis, the guard cells become turgid (plump) and this results in them bending slightly and the stomata opening allowing lots of gas exchange and loss of water via transpiration. When the plants lack water, the guard cells become flaccid (floppy) and this shuts the stomata, preventing further water loss.

Experienced, Supportive Teacher|KS3 & GCSE Science & A Level Biology

Interested in booking a 1-1 lesson with me?

Click here to view my profile and send me a message.
Back To Biology Back To Biology GCSE Back To Topic
Alert Icon

Need help with Biology?

We have thousands of qualified teachers who are able to provide top quality lessons online. Find your tutor and set up your free introduction today!

Find a Biology Tutor