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Gnesinka [82]
4 years ago
8

Explain how a octopus body plan and anatomy enables it to perform the essential functions it needs to survive?

Biology
1 answer:
irga5000 [103]4 years ago
5 0

Answer and Explanation:

The octopus is a complex aquatic animal, belonging to a class -of cephalopods. Its body plan has all the organs centralized within a large body cavity. These organisms have eight long limbs, which extend away  from the body cavity; on average they may grow up to 14 feet long.

Octopuses are invertebrates noted for their intelligence; they are capable of adapting to evade predators. They can camouflage by altering their appearance to hide within their environment, produce ink to obscure their environment and allow for their escape. One species produces toxins when attacked -the Australian Blue-Ringed Octopus.

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Bacteria can convert nitrogen in the air into a form plants can use
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3 years ago
Prior to neurotransmitter release, vesicles are transported to specialized regions of the presynaptic terminal called _______ zo
coldgirl [10]

Answer:

The correct answers are: Synaptic Active Zones, Exocytosis.

Explanation:

  • An impulse after travelling along the dendrites, cell body and axon of a neuron reaches the axon endings in the form of an action potential (signal transmitted by the activation of voltage gated sodium and potassium channels present on the plasma membrane of the neurons).
  • At the axon ending or the pre-synaptic region, the action potential triggers the opening of the voltage dependent calcium channels, that promotes the influx of calcium ions into the pre-synaptic region of the neuron.
  • This process triggers the fusion of the neuro-transmitter carrying vesicles with the plasma membrane in the pre-synaptic region of the neuron.
  • As a result of fusion the neurotransmitter is released into the synaptic cleft.
  • At the pre-synaptic region of the neuron, there is a huge concentration of neuro-transmitter carrying vesicles which remain adhered to proteins called CAZ (cytomatrix at the active zone) proteins. These proteins help the neurotransmitter carrying vesicles to remain tethered or docked to the pre-synaptic membrane in the axon terminal of the neuron. They together form the Synaptic Active Zone.
  • In response to calcium ion influx these proteins help the neurotransmitter carrying vesicles to fuse with the plasma membrane in the pre-synaptic region of the neural axon and release the neurotransmitter into the synaptic cleft.
  • The process of fusion of the neurotransmitter carrying vesicles with the plasma membrane in the pre-synaptic region of the neural axon followed by the release of the neurotransmitter into the synaptic cleft is known as Exocytosis.
6 0
3 years ago
Dr. Landry is using electroencephalography to measure the changes in electrical activity in an infant's brain in response to par
tatuchka [14]

Dr. Landry is recording  voltage fluctuations which are the result of ionic current within the neurons of the brain . Electroencephalography  is non-invasive monitoring method to record spontaneous electrical activity of the brain over a period of time.It is used to diagnose epilepsy, sleep disorders, encephalopathies, brain death.


3 0
4 years ago
Your lab group is experimenting with the diffusion of molecules across a membrane. Dialysis tubing is used as a model cell membr
Margaret [11]

Answer: the membrane channel

Explanation:

In passive diffusion, the small water molecules can move across the phospholipid bilayer seen in blue. This layer acts as a semi-permeable or selectively permeable membrane; its hydrophilic heads are attracted to water (seen facing outwards) while its water-repellent hydrophobic tails face towards each other- allowing  molecules of water to diffuse across the membrane along the concentration gradient.

Thus the water will move from an area of high concentration  to an area of low concentration, until the system reaches a steady state called equilibrium- after this, there will be no net movement of water. Similarly via osmosis, the water passes through the membrane due to the difference in osmotic pressure on either side of the phospholipid bilayer this means that the water moves from regions of high osmotic pressure/concentration to regions of low pressure/ concentration to a steady state.

The dialysis tubing mimics a semi permeable membrane; it only allows water and small molecules of iodine to cross into the bag containing starch. The tubing is impermeable to starch;  these large molecules require the aid of protein omplexes called membrane channels, in order to move across the membrane and against the concentration gradient.

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Answer:

Multiple Choice 0 Rb and E2F function to eliminate mutated DNA.

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