Sensory Receptors

Question 1

Sensory receptors transmit 4 types of information

Answer 1

• Modality
• Location
• Intensity
• Duration

Question 2

Modality

Answer 2

• Chemo
• Thermo
• Mechano

Question 3

Origin

Answer 3

• Interoceptors - internal organs, visceral pain, nausea stretch
• Proprioceptors - muscles, tendons, joints
• Nociceptors - high threshold mechano and thermoreceptors
• Exteroceptors - vision, hearing, tough, cutaneous pain

Question 4

Distribution

Answer 4

• General senses (somestetic) - touch, pressure, stretch, hot, cold, blood pressure/composition
• Special senses - head, innervated by cranial nerves

Question 5

Main types of sensory receptors

Answer 5

• Chemoreceptors
• Thermoreceptors
• Photoreceptors
• Mechanoreceptors

Question 6

Sensory transduction

Answer 6

The conversion of a sensory stimulus from one form to another

Question 7

Receptive field

Answer 7

The particular region of the sensory space (e.g., the body surface, or the visual field) in which a stimulus will modify the firing of that neuron

Question 8

Receptor potential

Answer 8

A type of graded potential, is the transmembrane potential difference produced by activation of a sensory receptor

Question 9

Generator potential

Answer 9

Stationary depolarization of a receptor that occurs in response to a stimulus and is graded according to its intensity and that results in an action potential when the appropriate threshold is reached also called receptor potential

Question 10

Tonic receptors

Answer 10

Adapts slowly to a stimulus and continues to produce action potentials over the duration of the stimulus

Question 11

Phasic receptors

Answer 11

Adapt rapidly to a stimulus. The response of the cell diminishes very quickly and then stops

Question 12

Adaptation

Answer 12

A change over time in the responsiveness of the sensory system to a constant stimulus

Question 13

Sensory modality

Answer 13

One aspect of a stimulus or what we perceive after a stimulus

Question 14

Sensory integration

Answer 14

The ability to take in, organise, and process information from the senses for use

Question 15

Principles of sensory integration

Answer 15

• Parts of the body receive sensory information from our environment
• Information is sent to the brian
• Brain interprets the information and compares it to other information coming in as well as to information stored in our memory
• Brain uses all of this information to help us respond to our environment