Question

9 fill in the blanks: the axons of the sns release the neurotransmitters , and . the axons of the psns release the neurotransmitter . 10 circle all that apply. which of the following are effects of the sns? a. increase in heart rate and force of contraction. e. increased urine production. b. increase in metabolic rate. f. adjustment of the lens for near vision. c. increased digestive functions. g. dilation of the bronchioles. d. dilation of the pupils. h. increased release of fatty acids and glucose.

Explanation:

The sympathetic nervous system (SNS) is part of the autonomic nervous system. Its main function is to prepare the body for "fight - or - flight" situations. When activated, it increases heart rate and force of contraction (a) to pump more blood to muscles, increases metabolic rate (b) to provide more energy, dilates pupils (d) to improve vision in low - light or high - alert situations, dilates bronchioles (g) to increase oxygen intake, and increases release of fatty acids and glucose (h) for energy. The parasympathetic nervous system (PSNS) is for "rest - and - digest" and is responsible for functions like increased digestive functions (c is a PSNS function in normal cases, not SNS) and adjustment of the lens for near vision (f is a PSNS function related to normal visual accommodation). Increased urine production (e) is more related to the endocrine system (e.g., antidiuretic hormone regulation) rather than SNS.

Answer:

a. Increase in heart rate and force of contraction, b. Increase in metabolic rate, d. Dilation of the pupils, g. Dilation of the bronchioles, h. Increased release of fatty acids and glucose.