Q: Pain threshold :-a- is the highest intensity of stimulus that causes painb- is the lowest intensity…
A: Pain refers to the sensation experienced by the animals including humans when they are exposed to…
Q: What are the five reflex arc components for the Plantar Reflex? Receptor, the type of the receptor,…
A: Reflex is a spontaneous involuntary response to the stimulus. Reflex arc is a pathway that carries…
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A: Hair cells do not themselves generate action potentials since they lack the requisite…
Q: What type of glial cell is the resident macrophagebehind the blood-brain barrier?a. microgliab.…
A: Glial cells are the supporting cells of the nervous system assisting the neurons in its functioning.…
Q: Sensory impulses from spindles of a stretched muscle could inhibit antagonistic muscles by :-a-…
A: The nervous system plays a major role in transmitting the reflexes from the tissues to the brain.…
Q: Describe different axon guidance mechanisms. Compare and contrast netrins, semaphorins, cadherins,…
A: Axon guidance It is the field of neural development which involves the process through which…
Q: Which of the following describes a stretch reflex?A. The receptor detects that a muscle is…
A: The receptor detects that a muscle is stretched, and sends a signal to contract it reflexively.
Q: 31- which of the following is not always a component of a reflex arc: a- effector organ C- CNS b-…
A: Reflex action is involuntary movement in response to stimulus. Reflex arc is a neural pathway.
Q: The ability of stronger stimuli to produce wider range of reflex responses depends upon :-a-…
A: The central nervous system consists of the brain and the spinal cord. It is the hub of information…
Q: MEDIAL LEMNISCUS VS. LATERAL LEMNISCUS: You heard your classmate sneeze; this stimulus passed…
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Q: Describe what is the Stretch Reflex?
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A: The brain is made up of more than just neurones. Also there are about 86- 100 billion neurones in…
Q: What is reticular fiber ? Where it is located ?
A: Ans: The explanation for reticular fibers and its locations in the human body as been mentioned in…
Q: How would the afferent pathway be affected by exposing this entire neuron to a drug that blocks…
A: Afferent pathway is a neural pathway which helps in conduction of nerve impulses from the sense…
Q: Cutaneous pain :-a- is always sharp in characterb- is transmitted by Aδ sensory fibersc- is always…
A: Different types of nerve fibers innervate different sensory receptors. The type Ia, Ib, and II…
Q: Absence of a tendon jerk could result from any of the following conditions, except :-a- lesions of…
A: Tendon jerk is a dynamic stretch reflex contraction of the muscle to which the tendon is attached.…
Q: The receptive field of a P cell is than the receptive field of an ipRGC. Fill in…
A: It is a delimited medium where some physiological stimuli can evoke a sensory neuronal response in…
Q: Explain the process Polarisation of the membrane of a nerve fibre.
A: Nerve fibre or axon is a part of a neuron. A neuron is the basic structural and functional component…
Q: In UMN lesions the response to plantar reflex :-a- becomes exaggerated b- becomes inhibitedc-…
A: A reflex that occurs when the sole of the foot is excited with an unpointed or blunt instrument is…
Q: Which of the following is an example of where interneurons are found? i) Within the spinal cord ii)…
A: Central nervous system (CNS) consists of Brain and spinal cord which regulate almost all functions…
Q: Describe a muscle spindle
A: The basic senses of humans include vision, audition, taste, smell, and touch. Sensory transduction…
Q: What do you mean by reticular fibres?
A: Connective tissue is one of the four basic types of tissues present in animals. There are three main…
Q: Give two similarities between the A-V nodal cells and the Purkinje fibres
A: There is a sequence of electrical events that occur inside the heart during the full contraction of…
Q: Explain the structure of medullated nerve fibre.
A: Nerve fiber is a long cylindrical projection of the nerve cell which conducts electrical impulses…
Q: How is the prolonged refractory period generated incardiac muscle? What is the advantage of a…
A: The absolute refractory period is a kind of duration of time that occurs after the starting of the…
Q: What happens to eye ball in the disorder myopia?
A: Eye is a sense organ and it has an ability to obtain visual images, which is then carried to the…
Q: In UMN lesions the response of the paralyzed muscles to electrical stimulation is :-a- exaggeratedb-…
A: Motor neurons are the nerve cells that are present in the brain and they control the movement of the…
Q: When the γ-motor neuron discharge to a muscle decreases, it causes :-a- increased muscle spindle…
A: The nervous system plays a major role in transmitting the reflexes from the tissues to the brain.…
Q: What is Sarin? What does it do? How does it do it?
A: Sarin is a nerve gas, which is extremely dangerous and toxic chemical, which is a organophosphorus…
Q: What do you mean by nonmedullated nerve fibre?
A: Nerve fibers (axons) are a long and slender projection of a nerve cell. Nerve fibers transfer the…
Q: During byperopia: older people can see far object and cannot see near objects easily, while during…
A: Hyperopia is a condition of farsightedness in which the patient can see distant object clearly and…
Q: what is the role of (1) electrochemical gradient created by ions, (2) permeability of the membrane…
A: There are a lot of ions present inside and outside the cell. From time to time these ions adjust…
Q: The highly localized nature of stretch reflex is due to :-a- the limited number of interneurons in…
A: The spinal cord reflexes produced by central nervous system (CNS) pathways, which lie entirely…
Q: How do muscle spindles differ from Golgi tendon organs?
A: Muscle spindles are tiny, spindle-shaped sensory receptors that extend parallel to the main muscle…
Q: 23- If the number of IPSPS on the membrane decreases while EPSPS remain the same: a- Triggering…
A: Excitatory Postsynaptic Potential (EPSP) is an excitatory charge on the postsynaptic membrane formed…
Q: The nuclear-chain fibers of spindles are innervated by :-a- Aα and Aδ nerve fibersb- Aδ and C nerve…
A: The central portion of the spindle is filled with fluid and has striated muscle fibers. These muscle…
Q: a) How does a CAP differ from a single action potential? b) Action potentials are said to be all or…
A: a*A compound action potential (CAP) is a signal from a nerve trunk which is made of numerous axons.…
Q: What does a nerve impluse flow more rapidly in myelinated nerve fibres than in non-myelinated nerve…
A: The axons of many neurons have a segmented white insulating cover over it. This is called myelin…
Q: what is the function of a tatctile corpuscle
A: Tactile corpuscles are a type of mechanoreceptor. They are basically nerve endings in the skin that…
Q: Explain the anatomy and function of the reticular activating system (RAS).
A: The brain is the most complex organ of the body that forms the part of the central nervous…
Q: What do you mean by nerve fibre?
A: The term nerve fiber can be used to describe any extension in the context of the nervous system. It…
Q: What is the difference between A-delta and C fibers?
A: Nociceptors are made up of different kinds of nerve fibres (axons) that have free ends. The diameter…
Q: Give some characteristics of reticular fibres.
A: The tissues are formed by a group of cells with similar structure and function together to perform a…
Q: A reflex arc includes :-a- at least two sets of sequential neuronsb- at least two sequential sets of…
A: A reflex action is a type of an involuntary action or a rapid response to a stimulus which basically…
What component of a reticular fibre makes it PAS-positive?
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Solved in 3 steps
- Describe different axon guidance mechanisms. Compare and contrast netrins, semaphorins, cadherins, and ephrins: in what way are netrins and cadherins similar in effect, and in what way are they different? In what way are semaphorins and ephrins similar, and in what way do they differ?Explain the anatomy and function of the reticular activating system (RAS).Explain why reticular fibers are also termed as argyrophilic fibers and lattice fibers
- Explain the process Polarisation of the membrane of a nerve fibre.How is the prolonged refractory period generated incardiac muscle? What is the advantage of a prolongedrefractory period?Why does the autonomic motor nervous system use twoneurons (preganglionic and ganglionic) in a chain to aneffector?