Biology · Grades 9–12
Nervous and hormonal communication · Revision sheet
Compare signal routes without forcing an absolute fast-versus-slow rule.
Learn the idea
Nervous
Neurons transmit electrical changes along membranes and often chemical signals at synapses.
Endocrine
Hormones travel through body fluids to cells with appropriate receptors.
Specificity
A signal affects a cell according to receptors and response machinery, not just proximity.
Comparison
Time scale and duration vary; simple contrasts have exceptions.
Explain without looking
- Why does an organism benefit from coordinating responses across tissues?
- Which statement is accurate?
Further reading and review references
- openstax.org · reference 1
- www.genome.gov · reference 2
- www.genome.gov · reference 3
- www.genome.gov · reference 4
- www.genome.gov · reference 5
- www.genome.gov · reference 6
These are reference links, not copied exercises, institutional endorsement or proof of independent review.
Independent educational review required. Grade bands are approximate; these are not officially aligned curricula.