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Nerve and Endocrine
| Question | Answer |
|---|---|
| What is the main function of the senses? | To detect changes in the environment and send information to the brain. |
| What structure in the eye controls how much light enters? | The pupil |
| What gland is known as the “master gland” of the endocrine system? | The pituitary gland. |
| What does the endocrine system use to send messages through the body? | Hormones released into the bloodstream. |
| Which sense organ contains tiny hair cells that help us hear? | The cochlea in the inner ear. |
| What is the purpose of a regulatory feedback loop in the body? | To detect changes and respond in a way that keeps the body in balance (homeostasis). |
| What is a reflex arc? | A fast, automatic pathway where neurons detect a stimulus and quickly send a response. |
| What triggers a neuron to produce a nerve impulse? | A stimulus strong enough to change the neuron’s electrical charge to reach threshold. |
| What is a nerve impulse? | An electrical signal that travels down the neuron’s axon. |
| How do neurotransmitters work? | They are chemicals released by a neuron to send messages across the synapse to the next cell. |
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