You come home one night to find a burglar in your house. your heart starts racing and you begin to perspire. these physical reactions are triggered by the: question 19 options:

Sympathetic nervous system

These physical reactions are triggered by the sympathetic nervous system.

The sympathetic nervous system is part of the autonomic nervous system that triggers the fight or flight response. The sympathetic nervous system functions through various interconnected neurons in the body and it is responsible for preparing the body for physical and mental activity. The sympathetic nervous system causes the heart to beat faster and stronger, opens the airways for easy breathe, and prevents digestion.

b tumor cells have a cell wall instead of a membrane

explanation:

tumor cells different from normal cells because tumor cells have a cell wall instead of a membrane.