Question

lite ?
12. What is the role of brain in reflex action ?
13. How does our body respond when adrenaline is secreted into
blood ?​

Answer 1

Answer:

12.The brain helps in storage of the memory of the stimulus to not commit same mistake again...

13.Our body responds like -

i. Heartbeat increase

ii. the breathing takes place faster

iii. the muscles get more supply of blood

iv. the thinking becomes more faster

Explanation:

hope it helps...

Answer 2

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Adrenaline hormone is secreted in large amounts when a person is frightened, or mentally disturbed. When it reaches the heart, it beats faster to supply more oxygen to our muscles. The breathing rate also increases because of the contractions of diaphragm and the rib muscles. It also raises the blood pressure, and allows more glucose to enter into the blood. All these responses together enable our body to deal with the emergency situations.

Adrenaline is a hormone secreted when a person is frightened or mentally disturbed. When Adrenaline reaches heart, heartbeat will increase to increase blood supply to our muscles. Adrenaline also increases the breathing rate because of contraction of diaphragm and the rib muscles. Adrenaline rush also increases blood pressure and allows entry of more glucose into blood. These altogether occurs when our body respond to secretion of adrenaline into our blood.

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