Which actions are functions of the somatic nervous system? check all that apply. regulates involuntary activities increases heart rate and blood pressure relays information to and from internal organs stimulates digestion regulates voluntary activities relays information to and from skin and skeletal muscles

The right answers are 5 and 6.
The somatic nervous system is part of the peripheral nervous system (part of the nervous system consisting of nerves and ganglia, and whose essential role is the transmission of information between the central nervous system - brain and spinal cord - and organs). It intervenes in the voluntary control of movements (or involuntary movements in case of reflexes, but this is different from the involuntary activities) (efferent fibers) and in the perception of external stimuli (afferent fibers).

The somatic nervous system controls the movements of skeletal muscle (which are generally voluntary) and the environmental perception, (think to the arc reflex).

The involuntary activities (proposition 1) mean automatisms like the heartbeat, respiration, secretions of hormones or sweat...