EXAM 2 - Nervous System: Brain

Question 1

Name 4 x Lobes

Answer 1

Frontal
Parietal
Occipital
Temporal
(Plus cerebellum and Limbic Systems)

Question 2

Gyri

Answer 2

Ridges

Question 3

Sulci

Answer 3

Shallow grooves

Question 4

Fissures

Answer 4

Deep grooves

Question 5

Ventricles

Answer 5

Fluid-filled chambers (filled with CSF)
- lined with ependymal cells
- C-shaped chambers deep in each hemisphere

Question 6

Frontal Lobe - Cortex & function

Answer 6

Cortex: Primary Motor Cortex
Function:
- Voluntary control of skeletal muscles
- somatic motor cortex
- Motor speech area
- Premotor area
- Seat of intelligence & abstract reasoning

Question 7

Parietal Love - Cortex & Function

Answer 7

Cortex: Primary Somatosensory Cortex
Function:
- Conscious perception of touch, pressure, pain, vibration, taste & temperature
- Primary sensory cortex
- THINK: Sensation, not senses

Question 8

Occipital Lobe - Cortex & Function

Answer 8

Cortex: Visual Cortex
Function:
- Conscious perception of visual stimuli

Question 9

Temporal Lobe - Cortex & function

Answer 9

Cortex: Auditory cortex & Olfactory cortex
Function:
- Conscious perception of auditory (hearing) and olfactory (smell) stimuli

Question 10

4 x Main Brain Regions

Answer 10

1. Cerebrum (divided into 2 x hemispheres, has 4 x lobes, cortex is outer part)
2. Cerebellum
3. Diencephalon
4. Brain stem

Question 11

Hypothalamus

Answer 11

Part of Diencephalon region
- ANS control centre
- Secretes hormones
- regulates many internal functions (maintains homeostasis

Question 12

Thalamus

Answer 12

Conveys sensory information (except smell) ascending to the cerebral cortex
- ‘relay centre for all sensory impulses except smell’

Question 13

Epithalamus

Answer 13

• Associated with pineal gland
• Secretes melatonin to induce sleep

Question 13

Medulla Oblongata

Answer 13

• Autonomic reflex centre involved in maintaining body homeostasis
• maintains CV centre, respiratory centres, sneezing, hiccups, vomiting, swallowing coughing

Question 14

Pons

Answer 14

• secondary respiratory Centre
• helps medulla oblongata maintain normal rhythm of breathing

Question 15

Midbrain

Answer 15

Controls visual reflexes that coordinate head and eye movements (when following a moving object)