T — Touch Smell Flashcards
Which of the following touch receptors is responsible for responding to deep pressure and vibration?
A) Meissner corpuscles
B) Pacinian corpuscles
C) Free nerve endings
D) Ruffini endings
b
What is the function of Meissner corpuscles?
A) Respond to light touch
B) Respond to deep pressure and texture
C) Respond to stretch
D) Respond to pain and temperature
a
What is the “two-point threshold”?
A) The minimum distance required to distinguish two different points
B) The maximum pressure that can be sensed on the skin
C) The distance between a receptor and a nerve
D) The point where light touch can no longer be felt
a
The two-point threshold is primarily dependent on which two factors?
A) Skin temperature and depth of touch
B) Density of nerves and area of skin tested
C) Type of receptors and intensity of pain
D) The elasticity of the skin and nerve endings
b
What is the “gate theory of pain”?
A) A theory that explains how the body cools down after exertion
B) A special mechanism that controls pain signals and affects whether we feel pain or not
C) A mechanism for how sound is processed in the inner ear
D) A method of enhancing the intensity of touch perception
b
What type of receptors are responsible for detecting pain?
A) Meissner’s corpuscles
B) Merkel cells
C) Ruffini endings
D) Nociceptors
d
Why can humans not sense pheromones in the same way that animals do?
A) Humans lack the necessary receptors in the skin
B) Humans don’t have an accessory olfactory epithelium or accessory olfactory bulb
C) Humans do not have functioning olfactory bulbs
D) Humans can sense pheromones, but in a less intense way
b
What is the role of the cribriform plate in olfaction?
A) It regulates the sensitivity of olfactory receptors
B) It processes the sensory signals before they reach the olfactory bulb
C) It separates the brain from the olfactory epithelium
D) It filters and amplifies olfactory signals
c
What is the glomerulus in the olfactory system?
A) A type of olfactory receptor cell
B) A point where olfactory sensory cells sensitive to the same molecule come together
C) A bundle of nerves that directs sensory signals to the brain
D) A cell that synthesizes pheromones
a
What happens when a molecule binds to a G-protein coupled receptor (GPCR) cell in the olfactory system?
A) The receptor becomes inactive
B) A G-protein opens an ion channel for positive ions to enter the cell
C) The molecule is converted into a neural signal
D) The olfactory bulb is triggered to process the signal
b
What is the function of mitral or tufted cells in the olfactory system?
A) They amplify the sensory signals coming from the nose
B) They send signals from the glomerulus to the olfactory bulb
C) They help in detecting pheromones
D) They store olfactory information for future recognition
b
