Question

question 10
all of the following cranial nerves are involved in proprioception except the:
vagus
hypoglossal
accessory.
abducens.
question 11
nerve impulses over the ______ nerve cause increased peristalsis and decreased heart rate.
olfactory
trigeminal
vagus
hypoglossal
question 12
a child was frightened by a large dog. the pupils of the childs eyes became dilated, and the heart and respiratory rates increased. these symptoms were caused by stimulation of:
the parasympathetic nervous system.
the sympathetic nervous system.
both the parasympathetic and the sympathetic nervous systems.
none of the above would account for the symptoms.

Explanation:

• Question 10: Proprioception is the sense of the relative position of body parts and movement. The vagus nerve is mainly involved in functions like regulating the heart rate, digestion, etc., not proprioception. The hypoglossal (controls tongue muscles - proprioception), accessory (controls neck and shoulder muscles - proprioception), and abducens (controls eye muscles - proprioception) are involved in proprioception.
• Question 11: The vagus nerve (parasympathetic) causes increased peristalsis (digestion) and decreased heart rate. The olfactory is for smell, trigeminal for facial sensation/movement, hypoglossal for tongue movement.
• Question 12: The sympathetic nervous system activates the "fight - or - flight" response. When a child is frightened (stressful situation), the sympathetic nervous system causes pupil dilation, increased heart and respiratory rates. The parasympathetic is the "rest - and - digest" system.

Answer:

• Question 10: vagus
• Question 11: vagus
• Question 12: the sympathetic nervous system