Question 1

Olfactory information is processed in each of these brain areas EXCEPT the

Accepted Answer

The thalamus is involved in processing sensory information for all senses except smell. Olfactory information bypasses the thalamus and goes directly to the olfactory bulb and then to other areas like the piriform cortex, hippocampus, and amygdala for processing.

Question 2

Which part of the brain becomes active when we taste and see something revolting?

Accepted Answer

The insula is the part of the brain responsible for processing taste and visceral sensations, including disgust. When we taste or see something revolting, the insula becomes active.

Question 3

Which structure serves as a relay station for incoming sensory information to the cerebral cortex?

Accepted Answer

The thalamus is a structure located in the forebrain that serves as a relay station for incoming sensory information from the body (e.g. touch, taste, sight, sound). It receives sensory input from various sensory organs and pathways and relays this information to the appropriate regions of the cerebral cortex for further processing and interpretation. The other options listed (hippocampus, amygdala, insula) are involved in different aspects of sensory processing or emotion regulation but do not serve as a relay station for incoming sensory information to the cerebral cortex.

Question 4

Aroon is a newborn.Which of the following statements is true with respect to his chemical senses?

Accepted Answer

Newborns have a strong preference for the smell of their mother's milk over other women's milk. This is an important survival mechanism that helps ensure the baby receives the proper nutrition. Aroon's ability to taste is not necessarily poor, but newborns do not have a preference for sweet tastes over bitter tastes. Their taste preferences are not fully developed yet. Aroon's rapid development of a preference for sour tastes is not necessarily true.

Question 5

While imaging their brains,Dr.Baquero shows one group of participants repulsive scenes on a computer screen.A second group of participants tastes a small portion of revolting food.What should images from the participants' brains reveal regarding cortical activity in the two groups of participants?

Accepted Answer

The insula is involved in processing disgust and is likely to be active in both groups when experiencing repulsive stimuli, whether visual or gustatory.

Question 6

Aleksander has been born a few hours ago and has spent his first moments on earth snuggled up with his mother.What is he likely able to do?

Accepted Answer

Newborns have a well-developed sense of smell that allows them to distinguish their own mother from another woman based on scent alone.

Answer: D
 Newborns have a preference for the smell of their mother's milk and show increased physiological arousal when exposed to it. This helps them learn to breastfeed and establish a bond with their mother.

A and B are unlikely abilities for a newborn as their taste preferences develop over time and are influenced by exposure to different foods.

Question 7

Which of the basic tastes are considered rewarding? Which are considered aversive?

Accepted Answer

According to research, salty and sweet tastes are considered rewarding, while sour and bitter tastes are considered aversive.

Question 8

When Amber eats the hot peppers she loves so much,a chemical called ___ activates __ receptors in her tongue.

Accepted Answer

Capsaicin is the chemical in hot peppers that activates pain receptors in the tongue, not taste receptors. This is why eating hot peppers can cause a sensation of burning.

Question 9

Compared to our other sensory receptors,olfactory receptors and taste receptors show a remarkable ability to:

Accepted Answer

Olfactory receptors and taste receptors have the unique ability to regenerate, which is not as common in other types of sensory receptors. This regeneration allows for the replacement of cells that have been damaged or have died, maintaining the sensitivity of these sensory systems over time.

Question 10

Which are the main senses involved in the experience of a spicy meal?

Accepted Answer

The experience of a spicy meal involves gustation (the taste), olfaction (the smell), and the tactile sense of pain. Spices contain compounds like capsaicin, which activates pain receptors in the mouth, creating a burning or tingling sensation. This tactile sense of pain, combined with the taste and smell, creates the overall experience of eating spicy food.

Question 11

Annelle is a professional "perfume smeller" for a major cosmetics firm.She claims that "the nose" is a gift: Some people are just born with more sensitive olfactory mechanisms than others are.How does Annelle view the relative importance of top-down and bottom-up processes in olfaction? Is Annelle's view of an innate olfactory talent supported by empirical research?

Accepted Answer

Annelle's belief that some people are born with more sensitive olfactory mechanisms suggests she views olfaction as primarily a bottom-up process, where sensory input is the primary determinant of olfactory ability. However, this view is discredited by research indicating that humans can indeed learn to discriminate among odors and that the piriform cortex, a part of the brain involved in olfaction, is highly plastic, suggesting a significant role for top-down processes in olfaction.

Question 12

Nazir is unable to tell the difference between two odours that have very similar chemical structures.As a participant in a study,one of these odours is paired with the delivery of shock to the finger.What is likely to happen as a result?

Accepted Answer

Nazir will now be able to discriminate between the two odours because of classical conditioning.

Question 13

The relationship between smell and memory reflects connections between the olfactory bulb and the ___.The link between smell and emotion reflects connections between the olfactory bulb and the ___.

Accepted Answer

The hippocampus is involved in memory formation, while the amygdala is involved in processing emotions. The olfactory bulb has connections to both, linking smell to memory and emotion.

Question 14

Darby is exposed to two odours that are below her just noticeable difference threshold.As a participant in a study,one of these odours is presented just before Darby receives a shock on her finger.What is likely to happen as a result?

Accepted Answer

Darby is likely to become sensitized to the odour that precedes the shock, enhancing her ability to discriminate between the two odours due to classical conditioning. This is because the odour paired with the shock becomes a conditioned stimulus for the shock (an unconditioned stimulus), leading to an increased sensitivity or awareness of that particular odour.

Question 15

Brayden has just burnt his tongue eating hot pizza.Which of the following statements is NOT true?

Accepted Answer

While burning his tongue repeatedly may cause temporary damage to taste receptors, it is unlikely to permanently decrease his sense of taste. The taste receptors on the tongue do regenerate over time.

Question 16

Whenever Savannah smells fresh chocolate chip cookies baking,it reminds her of when she was a little girl and her mother use to bake cookies for her after school.Now when she smells chocolate chip cookies she feels safe and secure.Which of the following statements is NOT supported by this example?

Accepted Answer

The example provided does not specifically mention or imply that the olfactory system is connected to the reward circuits in the brain. It focuses on the emotional and memory-related responses (safety, security, and nostalgia) triggered by the smell of chocolate chip cookies, which are more directly related to the amygdala and hippocampus's roles in processing emotions and memories, rather than the reward system.

Question 17

Which of the following represents the olfactory pathway from the nose to the brain?

Accepted Answer

The olfactory receptor cells in the nose send signals through the olfactory nerves to the olfactory bulb in the brain. The olfactory bulb then sends signals to the cortex for processing of smell. This is represented in choice D. The thalamus and other brain regions listed in the other options may play a role in processing smell, but they are not part of the primary olfactory pathway.

Question 18

The fact that newborns can recognize their mothers based on smell alone within a few hours after birth suggests that:

Accepted Answer

The fact that newborns can recognize their mothers based on smell alone within a few hours after birth suggests that olfactory information is in place before birth. This means that the olfactory system of the fetus is developed enough to recognize the mother's smell. It also implies that the mother's smell is present in the amniotic fluid and that the fetus is exposed to it before birth.

Question 19

When olfactory information reaches the olfactory nerve,it travels to which organ located beneath the frontal lobes?

Accepted Answer

The olfactory information travels first to the olfactory bulb before being transmitted to other regions of the brain such as the piriform cortex, amygdala, and cerebral cortex.

Question 20

Which receptors have a remarkable ability to regenerate and show a relatively fast turn-over rate?

Accepted Answer

Olfactory and taste receptors have a remarkable ability to regenerate and show a relatively fast turn-over rate. These receptors are constantly exposed to external stimuli and need to be replaced frequently to maintain proper functioning. Visual receptors also regenerate, but at a slower rate, and auditory and gustatory receptors have a more limited regenerative capacity.

Quiz 5: Sensation and Perception