Question

The activation of the sympathetic branch of the autonomic nervous system is associated with ____. slowing...

The activation of the sympathetic branch of the autonomic nervous system is associated with ____.

slowing the heart rate

stimulation of the digestive tract

increased alertness in a dangerous situation

lowered metabolic rate

Which of these best describes which direction the sodium-potassium pump moves ions?

sodium and potassium ions are both moved out of the cell

sodium and potassium ions are both moved into the cell

sodium ions are moved out of the cell and potassium ions are moved in

sodium ions are moved into the cell and potassium ions are moved out

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Answer #1

1. increased alertness in a dangerous situation

The sympathetic nervous system directs the body's rapid involuntary response to dangerous or stressful situations. A flash flood of hormones boosts the body's alertness and heart rate, sending extra blood to the muscles.

2. sodium ions are moved out of the cell and potassium ions are moved in

The sodium-potassium pump uses active transport to move molecules from a high concentration to a low concentration. The sodium-potassium pump moves sodium ions out of and potassium ions into the cell. This pump is powered by ATP. For each ATP that is broken down, 3 sodium ions move out and 2 potassium ions move in.

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