Nervous System And Endocrine

Question 1

What is the nervous system

Answer 1

Specialized network of cells in the human body and is our primary internal communication system. Based on electrical and chemical signals

Question 2

What are the two functions of the nervous system

Answer 2

-to collect process and respond to information in the environment
-to coordinate the working of different organs and cells in the body

Question 3

What are the two subsystems that nervous system is divided into

Answer 3

Central nervous system
Peripheral nervous system

Question 4

What is the central nervous system made of

Answer 4

Brain and spinal cord

Question 5

What is the brain

Answer 5

Centre of all conscious and awareness and divided into two hemispheres

Question 6

What is the spinal cord

Answer 6

Is an extension of the brain
It passes messages to and from the brain and connects nerves to the PNS. It is also responsible for reflux actions

Question 7

How does PNS transmit message

Answer 7

Via millions of neurons (nerve cells) to and from the central nervous system

Question 8

What is the peripheral nervous system divided into

Answer 8

Autonomic nervous system
Somatic nervous system

Question 9

What is the autonomic nervous system

Answer 9

Governs vital functions in the body such as breathing heart rate, sexual arousal and stress response

Question 10

What is the somatic nervous system

Answer 10

Governs muscle movement and receives information from sensory receptors

Question 11

What is the endocrine system

Answer 11

Works alongside the nervous system to control vital functions in the body

Question 12

What system is slower

Answer 12

Endocrine system Is slower because has widespread and powerful effects

Question 13

What does the gland do

Answer 13

Produce hormones

Question 14

What do hormones do

Answer 14

Hormones are secreted into the blood stream and affect any cell in the body that has a receptor for that particular hormone

Question 15

What is the key endocrine gland

Answer 15

Pituitary gland located in the brain. Often called master gland because controls the release of hormones from all the other endocrine glands in the body

Question 16

What does the thyroid gland produce

Answer 16

Thyroxine and affects cells in the heart (increase heart rate). Also affects cells throughout the body increasing metabolic rates

Question 17

What happens during fight or flight

Answer 17

The ANS and endocrine work together in parallel during a stressful event.
-when a stressor is perceived the hypothalamus activates the pituitary gland and
-this triggers activity in the sympathetic branch of the ANS
-the ANS changes from the parasympathetic state to the physiological aroused sympathetic state

Question 18

What is adrenaline

Answer 18

The stress hormone is released from the adrenal medulla into the blood stream. Triggers physiological changes in the body which creates the psychological arousal necessary for the flight or fight response

Question 19

What happens during immediate and automatic

Answer 19

All of this happens in an instant as soon as the threat is detected.
Acute response and an automatic reaction the body . These changes explain why stress panic or excitement are often experienced as sick feeling

Question 20

What happens during parasympathetic action

Answer 20

-Finally, once the threat has passed, the parasympathetic nervous system returns the body to its resting state. -The parasympathetic branch of the ANS works in opposition to the sympathetic nervous system - its actions are antagonistic to the sympathetic system. The parasympathetic system acts as a ‘brake and reduces the activities of the body that were increased by the actions of the sympathetic branch. This is sometimes referred to as the rest and digest response.