Researchers want to know how overfishing is impacting fish populations to make decisions about whether new policies are needed to protect fish populations. What empirical evidence could be collected to get an idea of how overfishing is affecting particular populations?

Scientists could measure the amount of bycatch.
Scientists could measure the amount of money collected by fishermen.
Scientists could measure the level of animal waste in the water.
Scientists could measure the number of fishermen on the water.

Answer:

a. are quick to adapt to a particular stimulus intensity.

Explanation:

Phasic receptors are the one that first generates an action potential in response to the stimulus. However, they adapt to that intensity of the first stimulus and reduce signaling. Slowly, they even stop signaling irrespective of the presence of stimulus of the same intensity.  

This is the reason that we get adapted to the specific odor such as gas leakage after some time even if the leakage continues.

The H zone is incorrectly matched with containing only thick filaments.

The pair that is not correctly matched is c. H zone - contains only thick filaments sarcomere. The H zone actually contains both thick and thin filaments. The correct pairing for the other options are:

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The pair that is not correctly matched is 'd. A band - light central region of sarcomere', as the A band is actually a region that overlaps the thin and thick filaments and is generally a darker region.

The question asks which of the provided pairs, related to muscle structure, is not correctly matched. The correct answer is d. A band - light central region of sarcomere. Sarcomeres, the fundamental units of muscle contraction, have various components: the I band contains only thin filaments, the Z disc marks each end of a sarcomere, and the H zone has only thick filaments.

However, the A band is not the light central region of the sarcomere; rather, it is a region that overlaps the thin and thick filaments and is generally a darker region.

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Answer:

A) [tex]RF = 0.428[/tex]

B) [tex]RF = 0.857[/tex]

Explanation:

RF value in thin-layer chromatography plate is defined as the ratio of distance moved by the steroid spot (A) to the distance migrated by solvent front(B)

Hence, mathematically

[tex]RF = \frac{A}{B}[/tex] ------Equation (A)

a) Here [tex]A = 6[/tex] cm and [tex]B = 14[/tex]cm

Substituting the given values in above equation, we get -

[tex]= \frac{6}{14} \\= 0.428\\[/tex]

b) Here [tex]A = 12[/tex] cm and [tex]B = 14[/tex]cm

Substituting the given values in above equation, we get -

[tex]= \frac{12}{14} \\= 0.857\\[/tex]

The Rf values for the two steroids based on their migration distances in thin-layer chromatography are calculated to be 0.4286 for steroid (a) and 0.8571 for steroid (b).

The question involves calculating the Rf values for two steroids based on their migration distances in thin-layer chromatography (TLC). The Rf value, which stands for retention factor, is calculated by dividing the distance the compound has traveled by the distance the solvent front has traveled.

For steroid (a) with a migration distance of 6 cm and a solvent front of 14 cm, the Rf value is calculated as:

Rf value for steroid (a) = distance migrated by steroid (a) / distance migrated by solvent front = 6 cm / 14 cm = 0.4286

For steroid (b) with a migration distance of 12 cm:

Rf value for steroid (b) = distance migrated by steroid (b) / distance migrated by solvent front = 12 cm / 14 cm = 0.8571

Answer: D. thrombocytopenia

Explanation:

Thrombocytopenia is a condition that is characterized by abnormally low levels of thrombocytes (platelets) in the liquid blood. The condition is either acquired or inherited. The thrombocyte count may go below 50,000 per microliter which is extremely low.

The patients with this condition generally show no symptoms. Some individuals may experience external bleeding like nosebleeds, and bleeding gums. Some may experience spontaneous bleeding under the skin.

Answer:  Cell body, Soma, or Perikaryon.

Explanation:

Neurons can vary in morphology but they keep 4 well-defined regions with distinct functions, they are: the Axon, the Axon terminals, Dendrites, and the cell body. To answer the question we are going to analyze the cell body. Because it contains the nucleus and other organelles, in this region we have the synthesis of practically all neuronal proteins and membranes, which gives it importance. Special transport processes involving microtubules move proteins and membranes from their sites of synthesis in the cell body down the length of the axon to the terminals.

Answer:

The answer would be Antibodies.

Hope this helps!

Answer:

D. Microglia

Explanation:

Microglia are phagocytic, which means that they are cells that can engulf other cells and particles. Microglia protect the CNS by engulfing foreign particles and bacteria. They act also as a clean-up crew that help remove dead cells. They are found in both the brain and spinal cord, which make up the Central Nervous System, or the CNS.

Microglia are the small, wandering cells that engulf cell debris and pathogens in the Central Nervous System (CNS), which is a process called phagocytosis. They are immune cells with defensive functions in the CNS.

Small, wandering cells that engulf cell debris and pathogens in the central nervous system (CNS), in a process called phagocytosis, are called microglia (D). These are immune cells with defensive functions, playing a critical role in the CNS's immune response. Unlike the astrocytes, which primarily provide biochemical support to endothelial cells that form the Blood-Brain Barrier and provision of nutrients to the nervous tissue, microglia are specialized immune cells that respond to any damage or invasion of pathogens in the CNS.

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Answer:

pinwheel

Explanation:

Orientation preference in the primary visual cortex is a prominent feature of higher mammals. The neurons are arranged in the fix orientation in a primary visual cortex.

The orientation map has analysed that there are pinwheel like orientation are arranged in the ordered fashion. Orientation preference of straight-line stimuli across the primary visual cortex is arranged in pinwheel pattern.

Thus, the correct answer is option (b).

Answer:

B. Large veins.

Explanation:

The blood always flows from the region of higher to the region of lower blood pressure. The blood is pumped from the heart into the arteries with the highest pressure and moves to arterioles, capillaries, venule and finally to veins. Since large veins such as superior and inferior vena cava collect the deoxygenated blood from body parts, they have the lowest blood pressure.

I believe the answer is b) diploid.

the prefix "di" means two. You could remember it that way :)

Answer:

(D) . TLR activation.

Explanation:

Nuclear factor kappa light chain enhancer of activated B cells (NF-κB) represents a protein complex, which plays various roles in activation of adaptive and innate immune response.

TLRs (toll-like receptors) are specific pattern recognition molecules found in pathogens that triggers immune responses. TLR activation stimulates activation of NF-κB signalling by triggering a downstream signaling cascades.

Activation of NF-κB signalling leads to upregulation of various pro-inflammatory substances or cytokines.

Thus, the correct answer is option (D).

Answer:

A

Explanation:

The hypothalamus is a portion of the brain particularly concerned with homeostasis; it influences the action of the medulla oblongata, a lower part of the brain, the autonomic nervous system, and the pituitary gland.

The hypothalamus is the brain area that is crucial in maintaining homeostasis. It regulates many bodily functions to keep a stable internal environment in response to changes in external conditions.

The brain area that is considered to be the integrating center for homeostasis is the hypothalamus. Homeostasis refers to the body's ability to maintain a stable internal environment despite changes in external conditions. The hypothalamus plays a crucial role in homeostasis as it regulates various bodily functions including temperature, thirst, hunger, sleep, mood and the release of hormones from the pituitary gland. Examples of its functioning can be seen when body temperature rises, and it triggers sweat to cool down the body, or when it senses low water volume in the blood and causes a feeling of thirst, driving us to drink water.

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Hello There!

METABOLISM - In an organism, the metabolism converts food into energy. Another important thing it does is it gives you the energy you need every day in life.

CATABOLISM - This is the break down of molecules that are very small. Cells need nutrients because inside them, they contain energy. Catabolic reactions release the energy and then makes all the different substances available.

ANABOLISM - This is the building of organic compounds. Complex molecules are synthesized from molecules that are way more basic.

Answer:

c. Cerebrum

Explanation:

The cerebrum is the part of the brain that is responsible for processing the sensory information, critical thinking and learning. It stores this information and processing centers make predictions for various conditions. The Wernicke’s area and Broca’s area represent the areas of language present in the cerebral cortex and are associated with language and speech.

Answer:

Thick

Explanation:

The H zone contains only thick filaments. :)

Answer:

The H zone contains only Thick filaments.

Explanation:

H zone The region of a striated muscle fibre that contains only thick (myosin) filaments. The H zone appears as a lighter band in the middle of the dark A band at the centre of a sarcomere. "H zone."

Answer:

True.

Explanation:

Carotid sinus is present at the base of internal carotid artery. Carotid sinus reflex is controlled by autonomic nervous system. The main function of carotid sinus reflex is to prevent the blood supply in the brain.

Aortic arc is located between the ascending and descending aorta. Aortic reflex may be defined as the the fall in blood pressure due to cardiac inhibition and peripheral dilation. The aortic reflex maintains the adequate flow of blood in systemic circuit as whole.

Thus, the given statement is true.

Answer:

Between the anterior cranial fossa and the nasal cavity.

Explanation:

The cribriform plate is between the anterior cranial fossa and the nasal cavity.

The cribriform plate is located in the cranial cavity, forming the roof of the nasal cavity and the floor of the anterior cranial fossa. It contains small openings for olfactory nerve branches to pass through to the brain and is part of the ethmoid bone.

The cribriform plate is a vital structure located in the skull. It can be found in the cranial cavity, forming part of the floor of the anterior cranial fossa right at the midline, and serving as the roof of the nasal cavity. This structure is made up of small, flattened areas with many small openings, known as olfactory foramina, and is formed by the ethmoid bone.

The cribriform plate has a crucial role in the sense of smell. The olfactory foramina within the cribriform plate allow the nerve branches from the olfactory areas of the nasal cavity to pass through and enter the brain. Adjacent to this crucial plate is the crista galli, which is a small upward bony projection that functions as an attachment point for brain coverings.

Answer:

(B). The drug is reabsorbed.

Explanation:

Renal clearance rate determines the excretion of drugs into the urine during excretion. It is used to study the main process associated with a drug's renal excretion.

When the renal clearance rate is lower than GFR (glomerulus filtration rate), the drug is absorbed in the renal tubules. When the renal clearance rate is higher than GFR, the drug is secreted into the urine. When the renal clearance rate is equal to the GFR, the drug is neither reabsorbed nor secreted.

As for given drug, renal clearance is 20 ml/min (less than GFR), this drug will reabsorbed.

Thus, the correct answer is option (B).

Final answer:

By calculating the number of moles of oxygen and using the molar ratio of hemoglobin to oxygen, we can find the molar mass of hemoglobin to be 2159.77 g/mol.

Explanation:

Hemoglobin is a protein found in red blood cells that transports oxygen from the lungs to the rest of the body. Each molecule of hemoglobin can combine with four molecules of oxygen. To find the molar mass of hemoglobin, we can use the given information:

To calculate the molar mass, we need to use the ideal gas law equation PV = nRT. Rearranging the equation, we get n = PV/RT, where n is the number of moles of the gas, P is the pressure, V is the volume, R is the ideal gas constant, and T is the temperature in Kelvin.

First, let's convert the temperature to Kelvin: 37°C + 273.15 = 310.15 K.

Next, let's convert the volume to liters: 1.99 mL ÷ 1000 = 0.00199 L.

Now we can calculate the number of moles of oxygen using the ideal gas law: n = (736 torr)(0.00199 L) / (0.08206 L·atm/mol·K)(310.15 K) = 0.002405 mol.

Since each molecule of hemoglobin combines with four molecules of oxygen, the molar ratio of hemoglobin to oxygen is 1:4. Therefore, the number of moles of hemoglobin is 0.002405 mol ÷ 4 = 0.000601 mol.

Finally, to find the molar mass of hemoglobin, we divide the mass of hemoglobin by the number of moles: Molar mass = 1.30 g ÷ 0.000601 mol = 2159.77 g/mol.

Answer:

Sleeping chemical agents can cause chronic insomnia and shows adverse consequences in an individual organism.

Explanation:

Sleeping pills or sleeping chemical agents belongs to the class psychoactive drugs and there main function is inducing sleep in an individual organism.

Sleeping chemical agents disturbs the sleeping pattern of an individual, loss of appetite, may leads to constipation and can cause chronic insomnia. Thus, there has been an adverse consequence on the use of chemical sleeping agents.

Chemical sleeping agents like barbiturates and benzodiazepines can disrupt the natural sleep cycle, leading to poor sleep quality and the risk of developing dependence. They can also cause adverse effects such as daytime drowsiness and cognitive issues.

Chemical sleeping agents such as barbiturates, benzodiazepines, and other sedatives have been associated with a range of unintended consequences.

While these substances are often prescribed as sleep aids, they have the potential to disrupt the natural sleep cycle, which may result in a reduction in the overall quality of sleep. Moreover, there's a risk that individuals who use these agents can develop a dependence, making it difficult for them to sleep without the medication.

In addition to interfering with sleep patterns, these medications may lead to other adverse effects, including daytime drowsiness, cognitive impairment, and an increased risk of falls, especially in the elderly. Because of these risks, many sleep medicine practitioners now advocate for non-pharmacological approaches, suggesting behavior and environmental changes and therapy for underlying issues before resorting to medication.

One historical example highlighting the dangers of pharmacological remedies is the case of thalidomide, which caused serious birth defects when taken by pregnant women to combat morning sickness. This highlights the importance of thoroughly understanding the potential consequences of drug use, which is not limited to sleep medications but extends to all psychoactive substances.

Answer:

The answer is B): type O blood.

Explanation:

If you have a B marker, your body will make A antibodies. Remember that an antibody is a blood protein that's produced in response to an antigen. Therefore, you can get a blood transfusion from someone with Type B or Type O blood, but not Type A or Type AB blood.

A jejunostomy is a surgical procedure that creates a new opening between two parts of the jejunum, primarily to facilitate dietary intake directly into the intestinal tract or to bypass a diseased segment of the stomach or duodenum.

The new opening or passageway created between two parts of the jejunum is called a Jejunostomy. The jejunum is the middle section of the small intestine, located between the duodenum and the ileum. A jejunostomy is performed primarily to facilitate the intake of nutrition directly into the intestinal tract or to bypass a diseased or blocked part of the stomach or duodenum during complex surgical procedures.

It is typically done in cases where the stomach can't adequately perform its role in digestion, due to conditions like stomach cancer or severe gastrointestinal disorders.

Learn more about Jejunostomy here:

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Answer:

The muscle that extends forearm at the elbow is the triceps brachii

Hello There!

Triceps Brachii extends the forearm at the elbow joint.

This is a large muscle on back of upper limb.

Answer:

The five categories of vertebral column are:

Explanation:

The 26 vertebrae of the spine or vertebral column are classified into five categories based on the structural differences between them. The first category is cervical and is made of seven cervical vertebrae. The spines of cervical vertebrae are shorter than that of others and have bifurcations.  

The next category is the thoracic and is made of twelve thoracic vertebrae. Thoracic vertebrae are followed by lumbar region made up of 5 lumbar vertebrae. Spines of thoracic vertebrae are longer and are directed downwards while that of the lumbar vertebrae project towards the posterior region. the sacrum is present below the lumbar region and consists of five fused sacral vertebrae. The last category of spine is coccyx. It has four fused coccygeal vertebrae.

The vertebral column is divided into five regions: cervical, thoracic, lumbar, sacral, and coccygeal.

The vertebral column, also known as the spine or backbone, is divided into five regions: cervical, thoracic, lumbar, sacral, and coccygeal. The cervical region consists of seven vertebrae, the thoracic region has twelve vertebrae, the lumbar region contains five vertebrae, the sacral region is composed of five fused sacral vertebrae, and the coccygeal region is made up of four fused coccygeal vertebrae.

Answer:

1,4,5 is correct

Explanation:

To look at which species is more closely related to another, look at the number of intermediate ancestors between each species. The lesser the number of ancestor intermediates, the closer the relatedness the species is to the common ancestor.

As long as the species is in the phylogenetic tree, the species may share a common feature with the common ancestor

Final answer:

The semitendinosus is part of the hamstring group, which also includes the biceps femoris and semimembranosus, and is responsible for flexing the knee. So the correct option is b.

Explanation:

Among the options provided, b. Semitendinosus is part of the hamstrings. The posterior compartment of the thigh includes muscles that are responsible for flexing the leg and extending the thigh, known as the hamstring group. These muscles are the biceps femoris, semitendinosus, and semimembranosus. The tendons of these muscles form the popliteal fossa, which is a diamond-shaped space at the back of the knee. On the other hand, the zygomaticus major muscle is a paired facial muscle that extends between the zygomatic bone and the angle of the mouth.

Answer:

Vision

Explanation:

Sensory cells may detect the information like taste, touch, hear and vision by the presence of receptors located on their surface.

Hyperpolarisation may be defined as the change in the cell's membrane potential towards more negative. The sensory vision cells are associated with the hyperpolarisation of cells and makes the cells environment more negative  in response to the stimuli.

Thus, the correct answer is option (d).