The Nervous System

Question 1

What is the structure of cerebellum?​

Answer 1

Large lump like structure found at bottom on rear side.​

Question 2

What is function of cerebellum?​

Answer 2

Responsible for controlling fine movements of muscles, move in complex ways.​

Question 3

What is structure of cerebral hemispheres?​

Answer 3

2 large cerebral hemispheres, taking up most of the skull, sit on left and right hand.​

Question 4

What is function of cerebral hemisphere?​

Answer 4

Conscious , memory, intelligence, as well as visual and sensory processing.​

Question 5

What is structure of medulla oblongata?​

Answer 5

Small elongated structure found in the brainstem, base of the brain.​

Question 6

What is function of medulla oblongata?​

Answer 6

Maintaining basic automatic functions, like breathing, digestion, swallowing, sneezing.​

Question 7

How is injury and disease in brain founded?​

Answer 7

Using CT scans and PET scans​

Question 8

What is CT scan?​

Answer 8

Fire x ray radiation from different angles to form image of brain, used for bleeding within skull, and damage to brain structures, not recommended for pregnant women, as exposes high number of radiation.​

Question 9

What is PET scan?​

Answer 9

A radioactive tracer is injected into blood, areas where tracer builds us, highlighted brightly, recongising cancerous tumours, as these use more blood.​

Question 10

Why is investigating brain difficult?​

Answer 10

The brain is complex and delicate, its easily damaged, drugs given to treat disease cannot alwa​ys be treated.

Question 11

What is the structure of sensory neurones?​

Answer 11

One long dendron and an short axon.​

Question 12

What is the structure of relay neurones?​

Answer 12

Short dendrites, and long axon.​

Question 13

What is the structure of motor neurones?​

Answer 13

Short dendrites, and an axon.​

Question 14

What are sensory neurones?​

Answer 14

Axon carrying nerve impulse from cell body to CNS.​

Question 15

What are relay neurones?​

Answer 15

Axon carrys nerves impulses to motor neurones.​

Question 16

What are motor neurones?​

Answer 16

Carries nerve impulses to effector cells.​

Question 17

What are synapses?​

Answer 17

Connection between 2 neurones.​

Question 18

What is the process of synapses?​

Answer 18

Neurotransmitters diffuse across, and then set electrical signal in next neurone. This is very fast, but slows during synapses.​

Question 19

What is axon?​

Answer 19

Single nerve fibre, carries nerve impulses away from cell body.​

Question 20

What is dendron?​

Answer 20

Connects to other neurons, impulse can pass between neurons.​

Question 21

What is myelin sheath?​

Answer 21

Allows nerve transmission faster.​

Question 22

What is the roles of neurotransmitters?​

Answer 22

Bind with receptor molecules.​

Question 23

What is process of a reflex arc?​

Answer 23

A stimuli is detected, which travels through sensory neurones, which are passed along a relay neurone causes to travel through a motor neurones, via synapses, , and then reaches an effector to react.​