These are chemical substances secreted by endocrine cells.

Hormones are chemically categorised into which two types?

Which hormones bind to receptors on the plasma membrane?

Water-soluble hormones, such as proteins and peptide hormones, activate target cells using ________.

Which hormones cross the phospholipid membrane to reach the receptors in the nucleus of the cell?

How would you classify a hormone that is made from cholesterol, such as a sex hormone?

In the second-messenger system, what serves as the first messenger?

Being lipid soluble, steroids can do all the following EXCEPT ________.

The diagram shows the mechanisms that control the concentration of glucose in the blood.

Which row identifies the glands and hormones labelled W, X, Y and Z?

Insulin and glucagon are produced by

Which one here is a hormone?

Auxin on the shoot tip is unequally distributed in response to

light.

Auxin on the shoot tip is unequally distributed in response to

gravity.

In the story 'Jack and the beanstalk', Jack grew a beanstalk that grew way into the clouds. If I wanted to try and grow one myself, which plant hormone would I give my beanstalk?

What happens when you place an over ripe banana in a fruit bowl with other fruit?

which plant hormone produces opposite effects?

Which of the following are plant hormones

Stimulates cell division

Inhibits cell division