NEET BIOLOGY

Detailed explanation-1: -Your sense of touch below your neck uses your somatic nervous system to reach your spinal cord, which then relays signals to your brain. Movement control. Your body’s muscles rely on signals that give them instructions to help you move around.

Detailed explanation-2: -Heart rate is controlled by the two branches of the autonomic (involuntary) nervous system. The sympathetic nervous system (SNS) and the parasympathetic nervous system (PNS). The sympathetic nervous system (SNS) releases the hormones (catecholamines-epinephrine and norepinephrine) to accelerate the heart rate.

Detailed explanation-3: -A somatic reflex is an involuntary response to a stimulus, such as pulling one’s hand away after touching a hot stove.

Detailed explanation-4: -Heart rate is largely regulated by the autonomic nervous system, which includes two anatomical divisions: the sympathetic and parasympathetic nervous systems (Wehrwein et al., 2016). The sympathetic nervous system increases heart rate, whereas the parasympathetic nervous system suppresses it.