Emotions influence autonomic reactions primarily through integration in the____
b. ventral horn of the spinal cord
Answer to question 1
The correct answer is (a): hypothalamus.
The hypothalamus is a brain area, which mediates bodily homeostasis, including the control of the autonomic responses of the body. One area hypothalamus receives inputs is the amygdala, which is the emotional control center of the brain. Thus, the hypothalamus integrates emotions and autonomic reactions by adjusting its autonomic output based on its input from the amygdala.
Answer to question 2
46. b. Hypothalamus
Explanation: Hypothalamus is the head regulator od the autonomic nervous system and is closely linked to the limbic system for emotion and behavioural responses.
47. c. Increased blood glucose, decreased GI peristalsis, and increased heart rate and blood pressure.
Explanation: Sympathetic stimulation causes increase Glucose level in blood by increasing the glycogenolysis from the liver. It decreases the GI peristalsis by decreasing the smooth muscle contraction. It increases the rate and force of heart contraction.
48. b. Both system differ in their efferent pathway
Explanation: Somatic NS is composed of one neuron while AUtonomic is composed of two efferent neurons.
49. c. Lens accomodation for close vision
Explanation: Parasympathetic system causes pupil constriction and ciliary muscle contraction to fascilitate near vision.
50. b) vasoconstriction of blood vessels innervating the Skeletal muscle
Explanation: Blood vessels of abdominal viscera, skeletal muscles are constricted while skin vessels gets dilated under sympathetic stimulation.