What is the secretory region?
secretory region – where nerve impulses are generated at axon hillock and the axon trigger zone. conductive region – generates nerve impulses and transmits them away from the cell body along the plasma membrane.
What is the secretory region of a neuron?
axon terminus
At the end of the axon, the axon terminus, is the secretory region where the neurotransmitters are released into the synapse. The trigger zone is where the area with chemically regulated gates and the area with voltage regulated gates meet, usually at the junction of the axon and cell body, the axon hillock.
What is an insufficient stimulus called?
Sub threshold Stimulus. An insufficient stimulus. Threshold Stiumulus. Any stimulus below this intensity will result in no response in a neuron.
Which region receives stimuli from the environment?
Peripheral sensory neurons receive input from environmental stimuli, but the neurons that produce motor responses originate in the central nervous system.
Are neuron cells?
Neurons are cells within the nervous system that transmit information to other nerve cells, muscle, or gland cells. Most neurons have a cell body, an axon, and dendrites. The cell body contains the nucleus and cytoplasm.
What is neural secretion?
Neural secretions are molecules that are released from the neurons of the central or peripheral nervous system. Many of such secretions are known to affect the functioning of the gut [1, 2, 3].
What is multipolar neuron?
Multipolar neurons are the most common types of neurons in the CNS; they form the autonomic ganglia. They possess a single axon with several symmetrically radiating dendrites. Some neurons have multiple axons or lack axons all together.
What happens after a neuron receives a stimulus?
A nerve impulse begins when a neuron receives a chemical stimulus. The nerve impulse travels down the axon membrane as an electrical action potential to the axon terminal. The axon terminal releases neurotransmitters that carry the nerve impulse to the next cell.
Which part of the nervous system is most immediately activated by sudden fear?
The fear response starts in a region of the brain called the amygdala. This almond-shaped set of nuclei in the temporal lobe of the brain is dedicated to detecting the emotional salience of the stimuli – how much something stands out to us.
What carries messages from the sense organs to the brain?
The neurons are arranged in bundles called nerves. Two main kinds of nerves are sensory nerves and motor nerves. Sensory nerves bring messages from the sense organs to the brain or the spinal cord.
What is a stimulus in nervous system?
A stimulus is a change in the environment (either external or internal) that is detected by a receptor. Receptors transform environmental stimuli into electrical nerve impulses. These impulses are then transmitted via neurons to the central nervous system where decision-making occurs.