Keywords - responses

Question 1

Kinesis

Answer 1

Response in which organism does not move towards or away from stimulus, instead it changes movement speed and rate it changes direction

Question 2

Taxis

Answer 2

Simple response where the direction is determined by the direction of the stimulus

Question 3

Tropism

Answer 3

Growth of part of a plant in response to a directional stimulus

Question 4

Generator potential

Answer 4

Depolarisation of membrane of a receptor cell as a result of a stimulus

Question 5

Pacinian corpuscle

Answer 5

Receptor cell found in skin that transduces mechanical energy of the stimulus into a generator potential

Question 6

Receptor

Answer 6

Cell that converts a non-electrical signal eg. light or sound, into an electrical signal

Question 7

Stretch-mediated sodium channel

Answer 7

Membrane channel whose permeability to Na changes when it is deformed by stretching

Question 8

Atrioventricular node (AVN)

Answer 8

Part of electrical conduction system in the heart.electrically connects atria and ventricles + causes a delay between their contractions -> allowing time for ventricles to fill w/ blood

Question 9

Autonomic nervous system

Answer 9

Part of nervous system, controlling muscles + glands, that is not under voluntary control. Consists of sympathetic + parasympathetic nervous system

Question 10

Chemoreceptor

Answer 10

Receptors found in wall of carotid arteries + aorta. Sensitive to changes in pH of blood that results from changes in CO2 conc

Question 11

Medulla oblongata

Answer 11

Region of the brain that regulates control of heart rate

Question 12

Sinoatrial node (SAN)

Answer 12

Area of heart muscle in right atrium that controls + coordinates contraction of the heart. Known as pacemaker