The membranes of all postganglionic neurons in autonomic ganglia have:
Effector cells that respond to acetylcholine release from postganglionic neurons have:
When acetylcholine binds with nicotinic receptors, the response is:
If acetylcholine binds to muscarinic receptors:
G proteins mediate the cell's response.
The two classes of adrenergic receptors are:
Alpha and Beta
Can be activated by the release of epinephrine
When norepinephrine binds to adrenergic receptors:
G proteins mediate the cell's response
When acetylcholine binds to autonomic muscarinic receptors:
Intestinal motility increases
Sympathomimetic agens activate:
Atropine causes the pupil of the eye to dilate by blocking the effect of muscarinic receptors. This means atropine is a:
Parasympathetic blocking agent
Which of the following drugs would be the best choice to use in chronic asthma to dilate the bronchioles?
Beta-adrenergic stimulating agents
(NOT a nicotinic, muscarinic, alpha-adrenergic blocking, ganglionic blocking agent)
Beta-blockers (beta-adrenergic blockins agents) are frequently used to:
Prevent increases in heart rate
Which of the following is NOT a sympathetic effect on the body?
Constriction of the pupil
(Increased coagulation, relaxation of ciliary muscle for far vision, decreased insulin secretion)
Which effector has no innervation with parasympathetic nerves?
(eye, pancreas, heart)
Which of the following is NOT an effect of parasympathetic action?
(increased tear production, increased motility of the intestines, increased gastric secretion)
are integrated somewhere in the CNS
Autonomic reflexes might be integrated in the:
Medula oblongata, spinal cord, hypothalamus
What part of the CNS integrates thoughts and emotions to produce ANS responses?
What part of the brain is in overall control of the ANS?
What type of reflex operates independently of the CNS?
Which of the following occurs when the parasympathetic system is stimulated?
Increased motility of the digestive tract
(NOT increased blood pressure, increased metabolism, increased heart rate, decreased motility of the digestive tract)
True or False: Sympathetic effects are always stimulatory, while parasympathetic effects are always inhibitory.
Which of the following statements is false?
False: Structures receiving dual innervation by the ANS are regulated equally by both divisions.
True-Both divisions of the ANS can produce stimulatory effects. True-Both divisions cooperate to achieve normal reproductive funvtion. True- The sympathetic divisions has more influence under conditions of physical activity than does the parasympathetic division. True- Dual innervation of organs by both divisions of the ANS is not universal.
Which of the following statements is true?
True- The sympathetic division diverges more than the parasympathetic division.
John sees Martha; the pupils of his eyes dilate. It is "love at first sight." What division of the ANS is involved?
Stimulation by the autonomic nervous system results in increased insulin secretion from the pancreas during and after a meal. The following are most likely to be true:
Increased insulin secretion is due to parasympathetic stimulation and acetylcholine agonists will stimulate insulin secretion.
When a person consumes a substantial amount of nicotine, the response:
Both increases parasympathetic responses and increases sympathetic responses.
Acetylcholine will cause the pupil of the eye to constrict. A drug acts on receptors for acetylcholine to cause the pupils of the eye to dilate. Nicotine does not bind to receptors in smooth muscle cells of the iris. Therefore, the drug which causes the pupils to dilate is a:
Muscarinic blocking agent.
The ______ division of the ANS functions mainly to prepare the body for energy-expending, stressful situations.
The ______ division of the ANS functions mainly under ordinary, restful conditions.
The two divisions of the ANS have antagonistic effects on each of the following EXCEPT:
The diameter of the blood vessels in skeletal muscles
(the diameter of bronchioles in the lungs, gastrointestinal peristalsis, heart rate, the eye)
Which of the following is NOT a parasympathetic effect?
Dilation of the bronchioles in the lungs
(Constriction of the pupils of the eye, contraction of the urinary bladder, decreased heart rate, increased gastric secretions)
Which of the following is a sympathetic effect?
Increased heart rate
(NOT Constrictions of the pupils of the eyes, constriction of the bronchioles in the lungs, contraction of the urinary bladder, Increased gastric secretions)
The component of the autonomic reflex arc that detects a change in stimulus is the: