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Flashcards in W3 Biological boundries Deck (20)
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1

What are neurons?

Cells that specialise in the transfer of information within nervous system 

2

What are the components of neurons?

Sensory Motor Interneurons

3

Describe sensory neurons

Transmit infomation from sensory receptors to the brain (afferent)

4

Describe motor neurons

Transmit commands from the brain to the muscles and glands of the body (efferent)

5

Describe Interneurons

Interconnect neurons, most common

6

What is the anatomy of the neuron

  • Dendrites (hair)
  • Cell body (nucleous)
  • Axon (body)
  • Terminal Buttons (feet)

7

What is a neuron

A neuron polarised with a - charge on the inside of the cell membrane The + charge rests outside

8

Describe depolarised

Increased firing potential (termed graded potentials)

9

Describe hyperpolarised

Decreased firing potential (termed graded potentials)

10

What are neurotransmitters?

Are chemicals that transmit info from one cell to another (sits on dendrite)

11

What are the key neurotransmitters?

Glutamate GABA Dopamine Serotonin Acetylcholine Endorphins and Enkephalins

12

What can neurotransmitters do?

Either increase or decrease firing potential

13

What is the endocrine system

Is a collect of glands that release hormones into the blood stream

14

What is the endocrine system

Is a collect of glands that release hormones into the blood stream, a global message that sends messages

15

What organs are involved in the endocrine system? (structure)

Pituitary Thyroid Adrenals Pancreas Ovaries Testes

16

Describe thyroid gland

Released hormones that control growth and metabolism

17

Describe Adrenal Gland

Secretes adrenalin and other hormones in to physiological/emotional stressors

18

Describe Pancreas

produced hormones that control blood sugar level

19

Describe the Somatic Nervous System

Apart of the Peripherial NS

 Carries sensory infomation to the brain and motor neurons that direct the action of skeletal muscles 

20

Describe Autonomic Nervous System

Controls basic life processes such as heart beat, breathing and digestive system