The Brain

Question 1

Cerebral cortex

Answer 1

Thought reasoning and social interaction

Controls voluntary/ motor responses after receiving sensory stimuli

Question 2

Cerebellum

Answer 2

Coordination of movement posture and valence using info from muscles and ears

Question 3

Hypothalamus

Answer 3

Controls autonomic nervous system and endocrine glands

Monitors composition of blood plasma

Question 4

Medulla oblongata

Answer 4

Controls smooth muscle in the gut wall breathing and heart rate- has reflex centres

Question 5

Pituitary gland

Answer 5

Anterior produced 6 hormones inc FSH

Posterior stores and releases hormones from hypothalamus inc ADH

Question 6

Nicotine

Answer 6

Mimics acetylcholine but once bound to receptor action potential is created but receptor is then unresponsive to further stimuli for a time
Triggers release of dopamine in brain

Question 7

Local anaesthetics: lidocaine

Answer 7

Blocks voltage gated sodium channels to stop action potential moving

Question 8

Cobra venom

Answer 8

Bonds to receptors at neuromuscular junction causing paralysis

Question 9

What is a generator potential?

Answer 9

Varys in sizes unlike ap

Only triggers ap if threshold is reached

Question 10

Heart rate: baroreceptors

Answer 10

Stretch to send messages about blood pressure sent to medulla oblongata

Question 11

Heart rate: co2 receptors

Answer 11

Detect changes in pH to speed up heart and get rid of co2
Sympathetic pathway to SAN using nt noradrenaline
Messages send to ventricles to increase contraction for higher blood pressure

Question 12

Heart rate: slowing

Answer 12

If needs slowing messages sent to parasympathetic using nt acetylcholine

Question 13

Heart rate: need fasting

Answer 13

Messages sent to adrenal gland which secretes adrenaline