Some examples from this set of practice questions
1.
how do animals try to increase their chances of survival ?
Answer: by responding to changes in their internal and external environment
2.
what other words we can refer to changes in the internal and external environment?
Answer: stimuli
3.
what is the definition of homeostatis?
Answer: maintaining a constant internal environment to ensure optimal conditions for enzyme action and functions of all cells, despite fluctuations in the external environment
4.
what are the 2 communication systems in the body?
Answer: nervous system and endocrine system
5.
what is cell signalling?
Answer: communication between cells, for example by a hormone binding to its receptor
6.
example of cell signalling
Answer: 1 cell releases a chemical which has an effect on the target cell, which responds to the signal
7.
how can cells transfer signals ?
Answer: locally and over large distances
8.
example of how cells transfer signals locally?
Answer: neurotransmitters transfer signals between neurones at synapses
9.
example of how cells transfer signals over large distances ?
Answer: hormones travel through the bloodstream to reach a target cell and trigger a chemical response within the cell
10.
definition of negative feedback
Answer: reverse change detected
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