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Zinaida [17]
2 years ago
15

During the relative refractory period of an action potential, a larger than normal stimulus is needed to cause another action po

tential. this is due to the fact that
Biology
1 answer:
Ede4ka [16]2 years ago
5 0
<span>Refractory period is the period after an initial stimulus when a neuron is not sensitive to another stimulus.</span><span>
During the relative refractory period of an action potential, a larger than normal stimulus is needed to cause another action potential. This is due to the fact that t</span>he voltage gated potassium ion channels remain open long enough to hyperpolarize the axon membrane.
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Sort the different barriers into their modes of reproductive isolation. A snail with a flat disc-like shell will not be able to
Stella [2.4K]

Answer/Explanation:

Types of reproductive isolation include: temporal, ecological, mechanical, and behavioural.

A snail with a flat disc-like shell will not be able to mate with a snail having a conical shell - this is an example of mechanical isolation, where the animals are physically unable to mate due to incompatible body shapes and sizes.

The reproductive organs of male bush babies do not match with the reproductive organs of females of other bush baby species. - this is another example of mechanical isolation, as the sexual organs will physically not allow reproduction between these species

The mating call of a cricket is not recognized by a cricket of other species - this is an example of behavioural isolation, which results from incompatible mating rituals. I.e. the animals do not respond to each others mating behaviours

The signals sent by a male firefly are not recognized by the female firefly of other species. - this is also an example of behavioural isolation.

Temporal isolation is where species cannot interact because they do not have the same mating seasons or are not active at the same type of day. ?Ecological isolation occurs when two species do not come into physical contact to one another because they access different areas of the habitat. E.g. mating zones, food sources or nesting sites.

8 0
2 years ago
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Which of the following is directly involved in driving protein import into the mitochondrial matrix space? A. GTP hydrolysis out
kumpel [21]

Answer:

The correct answer is D; ATP hydrolysis inside mitochondria

Explanation:

Proteins imports brought into the matrix of mitochondria are normally taken up from the cytosol in practically less time after their discharge from ribosomes. Transportation of protein imports into the matrix is driven by energy which is supplied by:

  • <u>ATP hydrolysis outside the mitochondra: </u>this occurs in the first step of translocation process. ATP hydrolysis drives the release of newly synthesized polypeptides from the hsp70 group of chaperone proteins.
  • <u>an electrochemical proton gradient</u> across the inner mitochondrial membrane maintained by electron transport process in the inner membrane.
  • <u>ATP hydrolysis in the matrix</u>: Hsp70 chaperone proteins in the matrix space likewise have a job in the translocation procedure, and they are the third point in the import procedure at which ATP is expended.

7 0
2 years ago
.Why do the common names of organisms—like daisy or mountain lion—often cause problems for scientists?
katen-ka-za [31]
C<span>ommon names can be confusing because they vary among languages and from place to place , SO  (D) hope this helps:)</span>
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2 years ago
Which portion of the brainstem serves as the relay center between the cerebrum and the cerebellum? a. The diencephalon b. The mi
Musya8 [376]

Answer: option C) The pons

Explanation:

The pons is a band of nerve fibers located within the brain stem. It links the fore brain (cerebrum) to the hind brain (cerebellum)

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2 years ago
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Every sensory neuron is a (an) ______ to the central nervous system, and every motor neuron is a(an) ______ from the central ner
Llana [10]

Answer:

Every sensory neuron is a (an) stimuli to the central nervous system, and every motor neuron is a(an) transmitter from the central nervous system.

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