Which one of the following is true of chemical signalling molecules?
- They always produce a rapid response - VCE - SSCE Biology - Question 13 - 2015 - Paper 1
Question 13
Which one of the following is true of chemical signalling molecules?
- They always produce a rapid response.
- They produce a response in target cells when released... show full transcript
Worked Solution & Example Answer:Which one of the following is true of chemical signalling molecules?
- They always produce a rapid response - VCE - SSCE Biology - Question 13 - 2015 - Paper 1
Step 1
They always produce a rapid response.
96%
114 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
This statement is false. Chemical signalling molecules do not always produce a rapid response; the response can vary depending on the type of signalling and the target cells involved.
Step 2
They produce a response in target cells when released.
99%
104 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
This statement is true. Chemical signalling molecules are designed to elicit a response in target cells upon their release, which is the fundamental mechanism of cell signaling.
Step 3
They only stimulate an effect on the cell that produced them.
96%
101 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
This statement is false. While some signalling molecules may act on the producing cell itself (autocrine signaling), many are designed to affect other target cells (paracrine or endocrine signaling).
Step 4
They require carrier proteins to be transported through body fluids.
98%
120 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
This statement can be partially true. While some chemical signalling molecules, especially hydrophobic hormones, require carrier proteins for transport in the bloodstream, others can freely diffuse in the fluid. Therefore, this statement is not universally true.
