coordinating response

Question 1

what is the fight or flight response

Answer 1

when there is a threat to survival, it stimulates physiological changes which prepare organism for activity

Question 2

what are the physiological changes associated with fight or flight

Answer 2

pupil dilate- makes retina more sensitive

heart rate/ blood pressure increase- increase blood flow deliver more o2 and glucose to muscles, removes co2

erector pili muscles contract to raise hair- make mammal look bigger and more threatening

ventilation increase- increase gaseous exchange so more o2 enters blood for aerobic respiration.

Question 3

blood glucose level increase is a physiological response associated with fight or flight. what does it do

Answer 3

supplies more glucose for aerobic respiration and more energy for muscle contraction

Question 4

the brain coordinates response through output to the effectors. what are three examples of output

Answer 4

effectors can recieve output by somatic system

parasympathetic and sympathetic output

hormones can act as an output from hypothalamus/ pituitary gland

Question 5

erector pili muscles contract to raise hairs, what is the survival value

Answer 5

make hairs stand, make animal look bigger, sign of agression

Question 6

heart rate and blood pressure increase is a physiological change, what is survival value

Answer 6

increase rate of blood flow to deliver more oxygen and glucose to muscles for aerobic respiration

Question 7

pupil dilation is a physiological response in the fight or flight response, what is survival value

Answer 7

more light in eyes to increase the retina sensitivity

Question 8

ventilation increase and depth increases

Answer 8

increase gaseous exchange so more o2 enters the blood and supplies aerobic respiration.

Question 9

what are examples of external receptors

Answer 9

eyes, ear nose

Question 10

what do internal receptors do

Answer 10

detect stimuli such as pain or increase in blood pressure or change in blood temperature

Question 11

what area of the brain does input from receptors enter

Answer 11

sensory areas in the cerebrum

Question 12

once input has reached sensory area in the cerebrum, what happens.

Answer 12

hypothalamus is stimulated when sensory area recognises threat

Question 13

what are the two responses of the hypothalamus when threat is detected

Answer 13

activate sympathetic ns and stimulate the pituitary gland to release hormones.

Question 14

when the sympathetic nervous system is activated by the hypothalamus, what happens

Answer 14

adrenal medulla activated to release adrenaline into blood stream
activates glands and smooth muscle