Lesson 1 ·Class 10 · The Endocrine System · Sort Lab
Hormones vs Nerves
Two coordinating systems, seven clean differences
Every statement belongs to one of the two systems that coordinate the body. Sort them.
Sorted 0/10
All items sorted — check each bin.
VS
Free play — sort every item into the bin it belongs in; each correct drop tells you why. Switch to when you're ready to test yourself.
Slow, blood-borne, widespread and possibly long-lasting means hormones. Fast, wired, local and short-lived means nerves. Only hormones can affect growth and metabolism; only nerves can be modified by learning.
What this lesson covers
Challenges to clear
- Sort every statement into the right system.
- Fill the hormonal column completely.
- Fill the Nervous control column — fast, electrical and precisely aimed.
The task
Every statement belongs to one of the two systems that coordinate the body. Sort them.
What this lesson covers
- Hormonal control — Chemical messengers poured into the blood: Usually slow to act (A hormone must be carried by the bloodstream all the way to its target organ, which takes far longer than an impulse racing along a nerve fibre.); Transmitted chemically through the blood (Endocrine glands are ductless: they pour their secretion directly into the blood, which carries it to all parts of the body.); Affects many different organs at once (Because blood reaches everywhere, a hormone can act on every target organ that responds to it, making the effect widespread.); Effect may be short term or long-lasting (Hormonal effects can persist for years — growth hormone shapes the skeleton over a whole childhood.); Can affect growth and regulate metabolism (Hormones bring about specific chemical changes and control metabolism; thyroxine and growth hormone are the standard examples. Nerves can do neither.)
- Nervous control — Impulses running along nerve fibres: Immediate and rapid (The impulse travels electrochemically along the nerve fibre, so the response begins almost at once.); Transmitted along nerve fibres and across synapses (Transmission is electrochemical along the fibre and chemical across each synapse, so it follows one fixed wired route.); Affects only a particular muscle or gland (A nerve fibre ends on one specific effector, so the effect is strictly local.); Effect is only short-lived (Once the impulses stop arriving, the muscle or gland stops responding almost immediately.); Can be modified by learning from previous experience (Nervous responses can be altered to some extent by earlier experience, whereas hormonal action cannot be learned or unlearned.)
Hint
Slow, blood-borne, widespread and possibly long-lasting means hormones. Fast, wired, local and short-lived means nerves. Only hormones can affect growth and metabolism; only nerves can be modified by learning.