Norepinephrine is released from sympathetic nerves, causing the heart rate to increase to higher values.
<h3>What is Norepinephrine?</h3>
Norepinephrine is a neurotransmitter (i.e., a chemical messenger) which is well known for sending information to the brain in order to increase alertness during some particular situation and also serve to constrict blood vessels.
In conclusion, norepinephrine is released from sympathetic nerves, causing the heart rate to increase to higher values.
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Answer:
True.
Explanation:
Blood flows to both sides of the heart at the same time, with heart valves on both sides opening and closing at the same time
Answer:
Lymphocytes and natural killer cells
Explanation:
Similarities:
• the eye and the ear are both passive structures
• the eye and the ear both respond to brain commands
Differences
• eyes relay the location and movement of objects in our visual field and the ears convey information about the actions of objects both in and outside of our visual field
• eyes are designed to sense light, while the ears are equipped to detect sound
