Questions
6What is the difference between a reflex action and walking?
Reflex action is an involuntary, automatic response to a stimulus controlled by the spinal cord, while walking is a voluntary action controlled by the brain.
What happens at the synapse between two neurons?
At the synapse, the electrical impulse triggers the release of chemical neurotransmitters that cross the gap and generate a new electrical impulse in the next neuron.
Which part of the brain maintains posture and equilibrium of the body?
The cerebellum, located at the back of the brain, maintains body posture, balance, and equilibrium.
How do auxins promote the growth of a tendril around a support?
When a tendril touches a support, auxin moves to the opposite side, causing cells there to elongate faster and the tendril to curl around the support.
What is the role of the brain in reflex action?
The brain receives sensory information about the reflex but the spinal cord executes the reflex; in some reflexes, the brain can modify the response.
How does chemical coordination occur in plants?
Plants use hormones like auxins, gibberellins, cytokinins, and abscisic acid that are produced in one part and diffuse to target cells to regulate growth, development, and responses.