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The preganglionic neurons in the ANS always release the neurotransmitter acetycholine.

T

The vagus nerve would innervate all of the following except

The iris

Cocaine is a(an) ___________________ drug, meaning that it promotes sympathetic nerve effects.

Sympathomimetic

The parasympathetic division of the autonomic nervous system

Only utilizes acetylcholine as a neurotransmitter

Increasing muscle contraction strength by activating more motor units is called recuitment.

True

Damage to the autonomic motor nerves would probably result in

No change in muscle tone

Organs innervated by autonomic motor neurons are often under voluntary control.

False

The division of the autonomic nervous system originating only from spinal nerves

Mediates the body's response to stress

The muscle spindle apparatus is associated with

Intrafusal fibers

Which of the following is a component of a motor unit?

Both B and C are correct choices.

The monosynaptic stretch reflex involves the actions of the muscle spindles.

True

Sympathetic and parasympathetic neurons generally release different neurotransmitters to their smooth muscle effector cells which is why these neurons often have antagonistic effects.

True

Autonomic motor neurons innervate all of the following except _____.

skeletal muscle

The division of the autonomic nervous system originating only from spinal nerves

Mediates the body's response to stress

The autonomic nervous system

Is not under conscious control

The muscle spindle apparatus is associated with

Intrafusal fibers

The neurotransmitter released at a neuromuscular junction is dopamine.

False

If the dorsal root of a spinal nerve were to be cut, the individual would

Both have no sensory perception from that nerve and have no reflexes involving that nerve are correct

Which of the following is an effect of the sympathetic division of the ANS?

bronchiole dilation

Reflex arcs

May have a single synapse

The monosynaptic stretch reflex involves the actions of the muscle spindles.

True

Sympathetic and parasympathetic neurons generally release different neurotransmitters to their smooth muscle effector cells which is why these neurons often have antagonistic effects.

True

Increasing muscle contraction strength by activating more motor units is called recuitment.

True

Fibers that secrete acetylcholine are called cholinergic fibers.

True

Motor unit recruitment allows for _________ contraction strength.

Increased

The neurotransmitter released at a neuromuscular junction is dopamine.

False

Somatic motor reflexes involve

Contraction of skeletal muscle

Alpha motoneurons innervate

Extrafusal fibers

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