Which of the following represents the correct association between cerebral hemispheres and emotional states?
Which of the following represents the correct association between cerebral hemispheres and emotional states? Left hemispheric activity is associated with more positive mood states.
What is the function of peroxisomes? Peroxisomes contain oxidative enzymes that produce hydrogen peroxide. They also break down fatty acids to Acetyl CoA.
Which of the following statements best describes the location of genes along these sister chromatids? Sister chromatids have identical alleles that are located in the same place along each sister chromatid.
Which statement best describes how a negative feedback system works? In negative feedback, the response of the body negates or counteracts a disruption of homeostasis.
The cerebral cortex, which is the outer surface of the brain, is associated with higher level processes such as consciousness, thought, emotion, reasoning, language, and memory.
The corpus callosum is a white matter tract that connects the cerebral hemispheres, facilitating interhemispheric connectivity.
Peroxisomes are organelles that sequester diverse oxidative reactions and play important roles in metabolism, reactive oxygen species detoxification, and signaling.
How would you describe a key difference in the functions of lysosomes and peroxisomes? Lysosomes break down and digest unneeded cellular components, while peroxisomes process and neutralize toxins.
Peroxisome. small, spherical organelle for producing and breaking down hydrogen peroxide. Important for breakdown of fatty acids, detoxification, and synthesis of cholesterol, bile acids, and myelin. granular matrix due to presence of numerous enzymes.
Which statement accurately describes the degree of linkage between pairs of genes on the same chromosome? Different pairs of genes on the same chromosome will exhibit different degrees of linkage, and some will assort independently.
Which of the following sentences best summarizes how genes and chromosomes are involved in transmitting information to future generations?
Which of the following sentences best summarizes how genes and chromosomes are involved in transmitting information to future generations? Chromosomes are composed of long strands of DNA organized into genes that code for specific traits. Because genes are inheritable, those specific traits are inheritable also.
hom*ologous chromosomes are chromosome pairs, one from each parent, that are similar in length, gene position and centromere location. hom*ologous chromosomes are two sister chromatids stuck together with cohesions forming a tetrad.
Which of the following is an example of negative feedback? If blood pressure increases, baroreceptors in major arteries detect the change and send signals to the brain. The brain then sends signals to the heart to cause it to beat slower and signals to the blood vessels to cause them to dilate.
Which best describes the role of a negative feedback loop? - The output is reduced so the body can maintain homeostasis.
Examples of negative feedback
A typical example of a negative feedback mechanism in the human body is the regulation of body temperature via endotherms. When the body's temperature rises above normal, the brain sends signals to various organs, including the skin, to release heat in the form of sweat.
Which division of the nervous system consists of the brain, spinal cord, and optic nerves? Central nervous system.
Generally, the sympathetic division does the following: Prepares the body for stressful or emergency situations—fight or flight.
Which component of a reflex arc carries information to the central nervous system? sensory neurons... Sensory neurons respond to signals from receptors in both the internal and external environments. The sensory neurons then carry the message to the spinal cord.
The hemispheres are connected by a large C-shaped fiber bundle, the corpus callosum, which carries information between the two hemispheres.
What part of the corpora quadrigemina is clearly observed in a midsagittal section? Correct. The superior colliculus is clearly observed in the transverse fissure on the back of the midbrain. It is involved with directing eye movement.
What are the names of the fibers that connect the cortical lobes gyri of the same hemisphere?
Longitudinal fasciculi connect the frontal lobe to the other lobes within the same cerebral hemisphere. Commissural fibers—interconnect between both hemispheres to allow communication. Their bands link the hemispheres and include the corpus callosum and anterior commissure.
Peroxisomes are small vesicles, single membrane-bound organelles found in the eukaryotic cells. They contain digestive enzymes for breaking down toxic materials in the cell and oxidative enzymes for metabolic activity.
Peroxisomes play a key role in the oxidation of specific biomolecules. They also contribute to the biosynthesis of membrane lipids known as plasmalogens. In plant cells, peroxisomes carry out additional functions, including the recycling of carbon from phosphoglycolate during photorespiration.
Peroxisomes are indispensable for human health and development. They represent ubiquitous subcellular organelles which compartmentalize enzymes responsible for several crucial metabolic processes such as β-oxidation of specific fatty acids, biosynthesis of ether phospholipids and metabolism of reactive oxygen species.
Lysosomes and Peroxisomes both contain enzymes and are membrane bound organelles.
Which of the following describes the main functions of transcription and translation? Transcription synthesizes a strand of mRNA that is complementary to the gene of interest, while translation synthesizes a protein within the ribosome.
Peroxisomes grow through the incorporation of peroxin proteins synthesized by free ribosomes in the cytoplasm. When large enough, they divide by binary fission, similar to mitochondria. They differ from mitochondria in their function and, unlike mitochondria, they contain neither their own DNA nor their own ribosome.
T/F: Peroxisomes are found in only a few specialized types of eukaryotic cell. Catalase, an enzyme normally found in peroxisomes, is present in normal amounts in cells that do not have visible peroxisomes.
What is the function of peroxisomes? Peroxisomes contain oxidative enzymes that produce hydrogen peroxide. They also break down fatty acids to Acetyl CoA.
Lysosomes have enzymes that work in oxygen-poor areas and lower pH. Peroxisomes absorb nutrients that the cell has acquired. They are very well known for digesting fatty acids. They also play a part in the way organisms digest alcohol (ethanol).
What is the relationship between recombination frequency and the actual physical distance on a chromosome?
So, we can say that a pair of genes with a larger recombination frequency are likely farther apart, while a pair with a smaller recombination frequency are likely closer together.
Genetic linkage is the tendency of two or more genes of the same chromosome to remain together in the process of inheritance while linkage disequilibrium refers to the non-random association of alleles at two (or more) loci. Therefore, this is the key difference between genetic linkage and linkage disequilibrium.
Which of the following sentences best summarizes how genes and chromosomes are involved in transmitting information to future generations? Chromosomes are composed of long strands of DNA organized into genes that code for specific traits. Because genes are inheritable, those specific traits are inheritable also.
Which of the following are processes within meiosis that produce genetic variation in offspring? During metaphase I of meiosis, hom*ologous chromosomes are shuffled, paired, and aligned at the center of the cell, allowing for genetic variability in offspring. crossing-over in prophase I produces genetic variation.
hom*ologous chromosomes are chromosome pairs, one from each parent, that are similar in length, gene position and centromere location.
In humans, somatic cells have how many chromosomes? how many pairs of hom*ologous chromosomes? 46 chromosomes forming 23 pairs of hom*ologous chromosomes.
Nervous tissue is found in the brain, spinal cord, and nerves. It is responsible for coordinating and controlling many body activities.
The release of oxytocin from the posterior pituitary gland during labor is an example of positive feedback mechanism. Oxytocin stimulates the muscle contractions that push the baby through the birth canal. The release of oxytocin result in stronger or augmented contractions during labor.
Which of the following is an example of negative feedback? If blood pressure increases, baroreceptors in major arteries detect the change and send signals to the brain. The brain then sends signals to the heart to cause it to beat slower and signals to the blood vessels to cause them to dilate.
Which statement best describes how a negative feedback system works? In negative feedback, the response of the body negates or counteracts a disruption of homeostasis.
Which of the following describes the cerebrum?
The cerebrum is the uppermost part of the brain. It contains two hemispheres split by a central fissure. The cerebrum itself contains the major lobes of the brain and is responsible for receiving and giving meaning to information from the sense organs, as well as controlling the body.
Which part of the CNS sorts almost all of the ascending sensory information? Thalamus.
The cortex of the insula just posterior to the gustatory cortex is involved in conscious perception of visceral sensations. These include upset stomach, full bladder, and the feeling that your lungs will burst when you hold your breath too long.
| Term | Definition |
|---|---|
| Which are of the brain is the staging area for skilled motor activities? | Premotor Cortex |
| The Phrase left brain and right brain indicate that the two cerebral hemispheres display a phenomenon called? | Laterization |
The limbic system is a group of interconnected structures located deep within the brain. It's the part of the brain that's responsible for behavioral and emotional responses.
| Question | Answer |
|---|---|
| Interneurons reside in the: | CNS only. |
| Which of the following is not a function of the central nervous system (CNS)? | Integrating sensory information, Evaluating the information, and Initiating an outgoing response |
| Nerves that contain mostly afferent fibers are called _____ nerves. | Sensory |
Cerebellum's main functions are motor coordination, posture maintenance, and balance. The cerebrum's main functions are sensory, motor, and higher mental functions. The size is smaller than the cerebrum. It is the Largest of the central nervous system.
The cerebrum is responsible for conscious sensation and voluntary movement, as well as advanced functions such as thinking, learning and emotion.
Thalamus: The thalamus is the relay center of the brain. It receives afferent impulses from sensory receptors located throughout the body and processes the information for distribution to the appropriate cortical area.
Which part of the brain is the "executive suite" that controls almost all brain activity? The cerebral cortex is the "executive suite" of the nervous system, where most of our higher-level decision making occurs.
Which parts of the brain are involved in nervous control of micturition quizlet?
The micturition reflex is coordinated by centers in the midbrain, and now parasympathetic control predominates.
The sympathetic nervous system regulates the process of urine storage in the bladder. In contrast, the parasympathetic nervous system controls bladder contractions and the passage of urine.
Association fibers connect the various cortical regions within each hemisphere, commissural fibers connect the corresponding regions of the two hemispheres, and projection fibers connect the cortex and lower parts of the brain.
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| Primary motor cortex | |
|---|---|
| Part of | Precentral gyrus |
| Artery | Anterior cerebral Middle cerebral |
| Identifiers | |
| Latin | cortex motorius primus |
The primary motor cortex, or M1, is located on the precentral gyrus and on the anterior paracentral lobule on the medial surface of the brain. Of the three motor cortex areas, stimulation of the primary motor cortex requires the least amount of electrical current to elicit a movement.
One of the brain areas most involved in controlling these voluntary movements is the motor cortex. The motor cortex is located in the rear portion of the frontal lobe, just before the central sulcus (furrow) that separates the frontal lobe from the parietal lobe.
