They transport amino acids
The right answers are 5 and 6.
The somatic nervous system is part of the peripheral nervous system <u>(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)</u>. 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...
The answer is A. bedrock chemical reactions
La relevancia de la ciencia y su misión social se logra gracias a la posibilidad de un conocimiento teórico capaz de penetrar cada vez con mayor profundidad en el conocimiento de la realidad, lo que se expresa a través del proceso de investigación científica, cuando se revelan los nexos esenciales.
