Why do concentration gradients exist?

Answer:

1. The characteristic thing about adult frog breathing is that drawing in air by lowering their mouth floor (option d).

2. The substance released by the lung secretory cells is the surfactant (option c).

3. The main divisions of the peripheral nervous system are the somatic and autonomic systems.

Explanation:

<h3>1. Breathing of the adult frog</h3>

The adult frog - while out of the water - uses a nasal breath, propelling air into its throat and oral cavity. The air content in the frog's mouth causes the internal pressure of the cavity to increase, and the floor of the mouth is modified to allow the passage of air to the lungs.

Under water, the frog's breath is cutaneous, that is, through its skin.

Adult frogs do not have gills or respiratory muscles.

<h3 /><h3>2. Pulmonary surfactant </h3>

Pulmonary surfactant is a substance produced and secreted by the pulmonary epithelium, specifically by type II pneumonocytes. The function of the surfactant is to keep the pulmonary alveoli open to allow gas exchange.

The surfactant is a substance of a lipidic and proteic nature that helps reduce the surface tension of the water, which in the socket prevents closure when the air is exhaled.

Another function is to prevent the germs - viruses and bacteria - present in the air from passing from the alveolus to the bloodstream.

<h3 /><h3>3. Divisions of the peripheral nervous system</h3>

The peripheral nervous system is dependent on the central nervous system and is made up of all the nerves that go to each of the tissues and organs of the body. It is divided into somatic and autonomic nervous systems.

Somatic nervous system is composed of nerves that drive nerve impulses to skeletal muscles, being predominantly voluntary. The involuntary response in this system is due to the existence of reflex arcs, whose center of integration is the spinal cord.
Autonomic nervous system is responsible for the innervation of coughs the internal organs, allowing their function under the coordination of the central nervous system. It is an involuntary system and is subdivided into sympathetic and parasympathetic systems.

The integration of both systems, somatic and autonomic, allows a body to perform all its functions, including the function of relationship, alertness and maintenance of organic homeostasis.

Learn more:

Frog breath brainly.com/question/1341903

Pulmonary surfactant brainly.com/question/7303958

Central and peripheral nervous systems brainly.com/question/2156614

5 0

3 years ago

What is the endosymbiotic hypothesis?

stepan [7]

Answer: What does the endosymbiont hypothesis propose? It proposes that early eukaryotic cells acquired the precursors of mitochondria and chloroplasts by engulfing certain types of bacteria. ... Mitochondria, chloroplasts, and centrioles in eukaryotic cells each contain their own minute and unique supply of DNA.

Explanation:

The first piece of evidence that needed to be found to support the endosymbiotic hypothesis was whether or not mitochondria and chloroplasts have their own DNA and if this DNA is similar to bacterial DNA. This was later proven to be true for DNA, RNA, ribosomes, chlorophyll (for chloroplasts), and protein synthesis.

3 0

3 years ago

Which letter indicates an articulating surface that is comprised of hyaline cartilage?

xxMikexx [17]

A letter indicates an articulating surface that is comprised of hyaline cartilage.

<h3>What is hyaline cartilage?</h3>

The synovial joints include hyaline cartilage, which facilitates joint motion.
Chondrocytes and extracellular matrix make up its structure.
The organization of the extracellular matrix, which determines the biomechanical characteristics of cartilage tissue, is greatly influenced by chondrocytes.
Hyaline cartilage covers the ends of the bones where they come together to create a joint.
In a typical healthy joint, this cartilage is bluish white and shiny.
Its main job is to reduce friction and act as a little cushion between the ends of the bones.
The synovial joints include hyaline cartilage, which facilitates joint motion.
Chondrocytes and extracellular matrix make up its structure.
The organization of the extracellular matrix, which determines the biomechanical characteristics of cartilage tissue, is greatly influenced by chondrocytes.

Learn more about hyaline cartilage here:

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7 0

1 year ago

What is genetic resistance

Zolol [24]

Answer:

Genetic resistance (or genetic tolerance) refers to the ability of certain organisms to endure environmental conditions that are extremely stressful or lethal to non-adapted individuals of the same species

Explanation:

8 0

3 years ago

Read 2 more answers

Which of the following statements best describes a benefit of sexual reproduction?

Ivan

Among the listed options, we can conclude that option C which states that "It results in the diversity of the species that enhances the probability of survival." is correct.

Sexual reproduction offers organisms an advantage over those who undergo Asexual reproduction. Though there are benefits and drawbacks to each method, Sexual reproduction is a method that is better adapted to a changing environment and promotes the faster evolution of a species.

The main benefit of sexual reproduction is that it allows for a greater diversity of the species which enhances the probability of survival. This is due to the fact that sexual reproduction leads to varying combinations of alleles for specific traits, which coupled with selective reproduction (the ability of a member of the species to choose a spouse with desirable traits) leads to offspring who over time are increasingly better adapted to life in the given environment, with specific traits tailored for survival.

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7 0

2 years ago