Do myelin sheaths slow down or speed up nerve impulses?

Do myelin sheaths slow down or speed up nerve impulses?
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Myelin sheaths are found: a) surrounding tendons b) covering the brain c) covering muscles d) around axons of neurons

Description : Myelin sheaths are found: a) surrounding tendons b) covering the brain c) covering muscles d) around axons of neurons

Last Answer : ANSWER: D -- AROUND AXONS OF NEURONS

Cells which envelop nerve fibres and form myelin sheath around the axon are

Description : Cells which envelop nerve fibres and form myelin sheath around the axon are

Last Answer : Cells which envelop nerve fibres and form myelin sheath around the axon are

Cells which envelop nerve fibres and form myelin sheath around the axon are

Description : Cells which envelop nerve fibres and form myelin sheath around the axon are

Last Answer : Cells which envelop nerve fibres and form myelin sheath around the axon are

Which of the following statement is correct for node of Ranvier of nerve? (a) Neurilemma is discontinuous. (b) Myelin sheath is discontinuous. (c) Both neurilemma and myelin sheath are discontinuous. (d) Covered by myelin sheath.

Description : Which of the following statement is correct for node of Ranvier of nerve? (a) Neurilemma is discontinuous. (b) Myelin sheath is discontinuous. (c) Both neurilemma and myelin sheath are discontinuous. (d) Covered by myelin sheath.

Last Answer : (b) Myelin sheath is discontinuous.

If we were to get rid of the hormones within us and electrical nerve impulses of the brain, we would pretty much achieve zombie state, am I right?

Description : If we were to get rid of the hormones within us and electrical nerve impulses of the brain, we would pretty much achieve zombie state, am I right?

Last Answer : Aren’t Zombies dead humans? We’d have to die first, no? Anyway, if we achieved zombie status, we wouldn’t know we’re in paradise so I vote no.

Chemicals by which nerve impulses transmit through one neuron by another are

Description : Chemicals by which nerve impulses transmit through one neuron by another are

Last Answer : Chemicals by which nerve impulses transmit through one neuron by another are

Chemicals by which nerve impulses transmit through one neuron by another are

Description : Chemicals by which nerve impulses transmit through one neuron by another are

Last Answer : Chemicals by which nerve impulses transmit through one neuron by another are

Assertion : The contraction and relaxation of muscle fiber are controlled by nerve impulses. Reason : The threshold stimulus is the minimum stimulus r

Description : Assertion : The contraction and relaxation of muscle fiber are controlled by nerve impulses. Reason : The threshold stimulus is the minimum stimulus r

Last Answer : Assertion : The contraction and relaxation of muscle fiber are controlled by nerve impulses. Reason : ... D. If both Assertion and Reason are false.

Can a nerve fibre and nerve both carry sensory and motor impulses?

Description : Can a nerve fibre and nerve both carry sensory and motor impulses?

Last Answer : There are the Mixed Nerves in the spinal column that carry bothsensory and motor nerves, but these neurons have 2 different jobsthat they do,& I know of no neurons doing both as the impulsestravel to 2 different locations which couldn't be done at the sametime.

What is the nerve carrying impulses from the eye to the thalamus?

Description : What is the nerve carrying impulses from the eye to the thalamus?

Last Answer : The optic nerves carry the impulses from the eyes to the visual area of the thalamus.

What part of the neuron carries nerve impulses away from the cell body?

Description : What part of the neuron carries nerve impulses away from the cell body?

Last Answer : AXON – A Long Fibre that CARRIES IMPULSES AWAY FROM THE CELL BODY. Each neuron has only ONE AXON. The Axon Ends in a series of small swellings called AXON TERMINALS.

Local anesthetics: A. Inhibit transmission of nerve impulses by increasing sodium membrane permeability and the displacement of ionized calcium. B. Are classified as amides or esters. C. Produce peripheral vasodilation. D. Are weak acids.

Description : Local anesthetics: A. Inhibit transmission of nerve impulses by increasing sodium membrane permeability and the displacement of ionized calcium. B. Are classified as amides or esters. C. Produce peripheral vasodilation. D. Are weak acids.

Last Answer : Answer: BC DISCUSSION: Local anesthetics act within the nerve membrane, where they inhibit transmission of nerve impulses by reducing sodium membrane permeability and the displacement of ionized ... based on this bond. All local anesthetics except cocaine produce vasodilatation and are weak bases

The nerve that carries the impulses from the sense organs to the central nervous sys- tem?

Description : The nerve that carries the impulses from the sense organs to the central nervous sys- tem?

Last Answer : Sensory nerve

Which nerve carries impulses from the eye to the brain?

Description : Which nerve carries impulses from the eye to the brain?

Last Answer : The optic nerve

Compared with myelinated nerve fibres, non-myelinated nerve fibres : a. have a higher threshold for stimulation b. have a longer refractory period c. transmit impulses at a lower frequency d. all above

Description : Compared with myelinated nerve fibres, non-myelinated nerve fibres : a. have a higher threshold for stimulation b. have a longer refractory period c. transmit impulses at a lower frequency d. all above

Last Answer : all above

Stretch reflex: a. is a monosynaptic reflex with a response time of 1 msec b. originates in the muscle spindle which sends off impulses in type Ia nerve fibres c. is intensified by impulses in the gamma efferent fibres d. all above

Description : Stretch reflex: a. is a monosynaptic reflex with a response time of 1 msec b. originates in the muscle spindle which sends off impulses in type Ia nerve fibres c. is intensified by impulses in the gamma efferent fibres d. all above

Last Answer : all above

Afferent nerve fibres carry impulses from (a) effector organs to CNS(b) receptors to CNS (c) CNS to receptors (d) CNS to muscles.

Description : Afferent nerve fibres carry impulses from (a) effector organs to CNS (b) receptors to CNS (c) CNS to receptors (d) CNS to muscles.

Last Answer : (b) receptors to CNS

Define Nerve impulses

Description : Define Nerve impulses

Last Answer : Neurons carry messages in the form of electro-chemical waves called nerve impulses.

Which element is essentials for the transmission of impulses in the nerve fibre?

Description : Which element is essentials for the transmission of impulses in the nerve fibre?

Last Answer : Calcium

Which is an example of negative feedback? A) Nursing action stimulates the hypothalamus to release oxytocin that triggers mammary gland milk production. B) When the blood becomes dilute, ADH is no longer released from the hypothalamus. C) Uterine stretching sends nerve impulses to the hypothalamus that releases oxytocin that triggers uterine contraction. D) FSH and LH stimulate the gonads to produce sperm or eggs. E) TRH stimulates the anterior pituitary to release thyroid-stimulating hormone.

Description : Which is an example of negative feedback? A) Nursing action stimulates the hypothalamus to release oxytocin that triggers mammary gland milk production. B) When the blood becomes dilute, ADH ... produce sperm or eggs. E) TRH stimulates the anterior pituitary to release thyroid-stimulating hormone.

Last Answer : B) When the blood becomes dilute, ADH is no longer released from the hypothalamus

What is the function of bundle sheaths? -Biology

Description : What is the function of bundle sheaths? -Biology

Last Answer : answer:

How armours /sheaths grounded?

Description : How armours /sheaths grounded? 

Last Answer : 1 core cables -- sheaths/shields/armours grounded at one end only, other end insulated to prevent the circulating current through sheaths. 3 core cables -- grounded at both ends but not including core balance CT’s, since even small induced current causes 50N operation. 

The material commonly used for sheaths of underground cables is (a) lead (b) rubber (c) copper (d) iron

Description : The material commonly used for sheaths of underground cables is (a) lead (b) rubber (c) copper (d) iron

Last Answer : (a) lead

The breakdown of insulation of the cable can be avoided economically by the use of (a) inter-sheaths (b) insulating materials with different dielectric constants (c) both (a) and (b) (d) none of the above

Description : The breakdown of insulation of the cable can be avoided economically by the use of (a) inter-sheaths (b) insulating materials with different dielectric constants (c) both (a) and (b) (d) none of the above

Last Answer : (c) both (a) and (b)

In the cables, sheaths are used to (a) prevent the moisture from entering the cable (b) provide enough strength (e) provide proper insulation (d) none of the above

Description : In the cables, sheaths are used to (a) prevent the moisture from entering the cable (b) provide enough strength (e) provide proper insulation (d) none of the above

Last Answer : (a) prevent the moisture from entering the cable

The material commonly used for sheaths of underground cables is (a) lead (b) rubber (c) copper (d) iron

Description : The material commonly used for sheaths of underground cables is (a) lead (b) rubber (c) copper (d) iron

Last Answer : (a) lead

What is Myelin Sheath ?

Description : What is Myelin Sheath ?

Last Answer : : A layer of isolated fatty substance beneath the neurallama is called myelin sheath .

What is Myelin ?

Description : What is Myelin ?

Last Answer : In most cases there is a layer of fluid between the neurilema and the axon. This layer is called myelin coating .

Myelin sheath is the covering of

Description : Myelin sheath is the covering of

Last Answer : Myelin sheath is the covering of A. Muscle cell B. Axon C. Blood vessels D. Osteocyte

What does the Schwann cell forms a myelin around?

Description : What does the Schwann cell forms a myelin around?

Last Answer : Feel Free to Answer

Myelin?

Description : Myelin?

Last Answer : DefinitionMyelin is an insulating layer that forms around nerves, including those in the brain and spinal cord. It is made up of protein and fatty substances. The purpose of the myelin sheath is ... If the myelin is damaged, the impulses slow down. This can cause diseases like multiple sclerosis.

Phospholipids occur in (A) Myelin sheath (B) Stabilizes chylomicrans (C) Erythrocyte membrane (D) All of these

Description : Phospholipids occur in (A) Myelin sheath (B) Stabilizes chylomicrans (C) Erythrocyte membrane (D) All of these

Last Answer : Answer : D

What is Myelin sheath?

Description : What is Myelin sheath?

Last Answer : They fatty sheath covering on the axon is called Myelin sheath.

Which of the following is regarded as a unit of nervous tissue? (a) Neurons (b) Myelin sheath (c) Axons (d) Dendrites

Description : Which of the following is regarded as a unit of nervous tissue? (a) Neurons (b) Myelin sheath (c) Axons (d) Dendrites

Last Answer : (a) Neurons

Myelin sheath is produced by (a) astrocytes and Schwann cells (b) oligodendrocytes and osteoclasts (c) osteoclasts and astrocytes (d) Schwann cells and oligodendrocytes.

Description : Myelin sheath is produced by (a) astrocytes and Schwann cells (b) oligodendrocytes and osteoclasts (c) osteoclasts and astrocytes (d) Schwann cells and oligodendrocytes.

Last Answer : (d) Schwann cells and oligodendrocytes.

Myelin sheath is produced by : (1) Astrocytes and Schwann cells (2) Oligodendrocytes and Osteoclasts (3) Osteoclasts and Astrocytes (4) Schwann cells and Oligodendrocytes

Description : Myelin sheath is produced by : (1) Astrocytes and Schwann cells (2) Oligodendrocytes and Osteoclasts (3) Osteoclasts and Astrocytes (4) Schwann cells and Oligodendrocytes

Last Answer : (4) Schwann cells and Oligodendrocytes

In biological studies which of the following is used to refer to the oxygen-binding, iron-containing, conjugated protein complex present in the sarcoplasm of muscle cells? a) myelin b) myosin c) myoglobin d) none of these

Description : In biological studies which of the following is used to refer to the oxygen-binding, iron-containing, conjugated protein complex present in the sarcoplasm of muscle cells? a) myelin b) myosin c) myoglobin d) none of these

Last Answer : ANSWER: C -- MYOGLOBIN

In most axons, the myelin sheath is interrupted at intervals of about 1 millimeter or more. These interruptions are called the: a) glial b) nodes of Ranvier (pron: ron-vee-ay) c) collaterals d) nodes of Babinet

Description : In most axons, the myelin sheath is interrupted at intervals of about 1 millimeter or more. These interruptions are called the: a) glial b) nodes of Ranvier (pron: ron-vee-ay) c) collaterals d) nodes of Babinet

Last Answer : ANSWER: B -- Nodes of Ranvier

When you're at the end of something good, do you speed up or slow down?

Description : When you're at the end of something good, do you speed up or slow down?

Last Answer : answer:I tend to speed up if I can. Sticking with the Netflix example: the last time I watched a show online, I found out about 75% of the way through that the whole series wasn't actually ... of course), whereas later installations tend to leave things open as a way of driving towards the finale.

If death meant leaving the stage long enough to change & come back as a new character...Would you slow down or speed up?

Description : If death meant leaving the stage long enough to change & come back as a new character...Would you slow down or speed up?

Last Answer : I’d slow down and probably commit many more ‘sins’.

If you were driving down the freeway at nighttime during construction work and spotted several Highway Patrol officers near the construction area with their lights on would you a: speed up b: slow down c: continue at the same speed (assuming that this is a multi-lane freeway and you are able to go at or above typical freeway speeds)

Description : If you were driving down the freeway at nighttime during construction work and spotted several Highway Patrol officers near the construction area with their lights on would you a: speed up b: slow down c: ... this is a multi-lane freeway and you are able to go at or above typical freeway speeds)

Last Answer : I always slow down for construction sites. Those “My Daddy Works Here!” signs got me.

How does an inhibitor slow down a reaction and a catalyst speed up a reaction?

Description : How does an inhibitor slow down a reaction and a catalyst speed up a reaction?

Last Answer : A catalyst works by providing a reaction route with a loweractivation energy. An inhibitor slows a reaction and can work inseveral ways, for instance by tying up one of the reactants. ... when we say catalyst inhibitor, which issomething which binds to the active sites on a heterogeneouscatalyst.

As load is added to a shunt motor, the motor will _________. A. speed up B. continue to operate at the same speed C. slow down slightly D. stop

Description : As load is added to a shunt motor, the motor will _________. A. speed up B. continue to operate at the same speed C. slow down slightly D. stop

Last Answer : Answer: C

Why does time slow down as one approaches the speed of light?

Description : Why does time slow down as one approaches the speed of light?

Last Answer : One thought experiment that shows that time does in fact slow down is to imagine two inertial frames of reference- call them spaceships if you want- moving relative to each other. Say that each ship has a ... that seems to contradict the twin paradox. Hmm I'll have to think on it a bit more.

When the heat is very hot, my accelerator pedal and nothing stops responding and the speed and speed slowly slow down

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Last Answer : Moderator is a material which is used to slow down the neutrons produced during nuclear fission ... neutrons C. magnetic neutrons D. electric neutrons

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