nerves that carry impulses to the brain and spinal cord. Also known as sensory nerves
nerves that carry impulses away from the brain and spinal cord. Also known as motor nerves
the part of the nervous system that controls skeletal muscles and therefore voluntary movement
Somatic Nervous System
the nervous system that controls the involuntary responses
autonomic nervous system (ANS)
two branches of the autonomic nervous system
smooth and cardiac muscles and glands
The ______ branch is concerned with daily body upkeep and maintaining a homeostatic environment and this is often called the "sleep and eat" system.
The ______ branch represents the alert system for stressful situations and is often referred to as the "fight or flight" system.
What is the parasympathetic effect on the heart?
decreases rate and contractile force
What is the sympathetic effect on the heart?
increases rate and contractile force
What is the parasympathetic effect on the lungs?
What is the sympathetic effect on the lungs?
The two main neurochemical substances stored or manufactured at the ends of nerve fibers are ____ and ____.
Where is ACh found?
both preganglionic junctions and postganglionic junctions of the parasympathetic nervous system and the preganglionic site of the sympathetic nervous system
Where is NE found?
only at the postganglionic junction of the sympathetic nervous system
nerve cell body outside of the brain and spinal cord
receptors found at the skeletal muscles in the somatic system and at all preganglionic sites in the parasympathetic and sympathetic nervous systems
The function of the nicotinic receptors is to:
They pass the signal on to the postsynaptic neuron and are then carried to the target gland, organ, smooth muscle, or cardiac muscle
receptors found at the postganglionic site of the parasympathetic nervous system
Where are muscarinic receptors found?
on involuntary muscles or glands
What neurotransmitter binds to muscarinic receptors?
receptors of the sympathetic nervous system that include alpha- and beta- receptors
What neurotransmitter binds to adrenergic receptors?
receptors found in the sympathetic nervous system that generally cause vasoconstriction
receptors found in the sympathetic nervous system that are divided into 2 subcategories
_____ receptors are found primarily in the heart.
When Beta1 receptors are stimulated, what do they cause?
increase in rate and force of contraction (heart)
When Beta 2 receptors are stimulated, what do they cause?
bronchodilation (in lungs)