A neuron receiving a large enough signal, a resting potential changes and produces electrical impulse called ___________.

Q: In the CNS, myelin is produced by glial cells called ___________ .

A: Myelin is an insulating layer or sheath that surrounds the nerves and it is produced by specialized…

Q: Why the refractory period sets a limit to how frequently a neuron can fire.

A: The neurons are the specialized cells which make up the nervous system. These cells have a special…

Q: Why the same neurotransmitter can have different effects on different cells.

A: Neurotransmitters-the brain chemicals that transmit information through brain and body.They pass on…

Q: The neurotransmitter secreted at an adrenergic synapse is _____________.

A: Neurotransmitters are the biochemical messengers secreted from nerve cells used to transmit a…

Q: Neurons that convey information to the CNS are called sensory, or ___________  , neurons.

A: Neurons and nerve cell are basic fundamental and functional unit of the nervous system. These cells…

Q: At __________ synapses, neurotransmitters hyperpolarize the membrane, by making it more permeable to…

A: The synapse is the connection between two neurons. In case of chemical synapse neurotransmitters are…

Q: CNS is composed of _____________ and ______________.

A: Most systems and organs of the body manage only one role, however the central nervous system perform…

Q: The change in the electrical balance between the intra- and extra-cellular fluid that occurs when a…

A: The messages sent by neurons are in the form of electrochemical signals, indicating that these…

Q: Substances that mediate and amplifies signals inside the cell called __________ (H) __________

A: Signal amplification means when the original signal is conveyed it is in Lower frequency and when it…

Q: A/An _____ synapse is formed when a presynaptic neuron synapses with the cell body of a postsynaptic…

A: Chemical synapse

Q: The ___________________ provides electrical insulation that allows faster propagation of nerve…

A: Myelin sheath forms the insulating layer around neurons of brain and spinal cord. Myelinated axon is…

Q: The sciatic nerve is a composite of two nerves, the ___________ and _________ .

A: The sciatic nerve is the longest and the largest nerve of the human body. It originates from the…

Q: Fill in the blanks:  When a nerve cell is at rest, there is a relatively greater concentration of…

A: A neuron is a basic functional unit of the nervous system. It is a complex network of specialized…

Q: The ____________  is a period of time in which a neuron is producing an action potential and cannot…

A: Introduction  Nerves play vital role in conduction of signals from CNS to various other organs,…

Q: The ___________ ganglion contains the somas of neurons that carry sensory signals to the spinal…

A: The spinal cord and the spinal nerves are a part of the central nervous system (CNS) that extends…

Q: Narcotic drugs are ____________ that ____________ thecentral nervous system.

A: Narcotic drugs act as a sedative, hypnotics, or tranquilizers.

Q: A myelinated nerve fiber can produce action potentials only in specialized regions called…

A: Myelin: Myelin is a fatty substance that is situated around the nerve cell axons. It insulates and…

Q: The _______________ nervous system conducts impulses from the brain and spinal cord to the skeletal…

A: The nervous system comprises nerves that connect the brain and spinal cord to voluntary and skeletal…

Q: The autonomic nervous system has two parts that counterbalance each other; these are…

A: Autonomic neural system consists of a special set of peripheral nerves that innervate visceral…

Q: What causes the action potential to move down the axon

A: Neurons are special cells that transmit and process data from one part of the body to another. The…

Q: Fill in the blank:  Myelin contains a high proportion of _______________________.

A: The basic unit of communication in the nervous system is the neuron. A neuron is also called as…

Q: In the PNS, neuron cell bodies are located in ______________ and surrounded by neuroglial cells…

A: Nervous system contains two types of cells that are neurons and glial cells. Neurons contain axon…

Q: __________ receive electrical impulses while ___________ conduct them to the next. regarding…

A: Motor nerves are present in CNS mainly in the spinal cord and transmit signals from CNS to muscle.…

Q: Neurons release _____________from the axon terminus in order to locally depolarize the postsynaptic…

A: Muscle contraction begins at the neuromuscular junction (NMJ), which is where the terminal of a…

Q: A mixed nerve contains both _______________ and _______________ fibers.

A: A neuron is considered the basic fundamental unit of the nervous system. This is the longest body…

Q: Fill in the blank:  An action potential is a rapid sequence of changes involving…

A: Action potential (AP) is the mode through which a neuron transports electrical signals. It is…

Q: If a resting potential becomes more negative, the membrane is said to be __________.

A: The behaviour and function of a cell depends on the membrane potential which directly affects the…

Q: True or False: All input to a neuron occurs via synapses on the neuron's dendrites

A: Neurons are the structural and functional units of the nervous system. They contain dendrites, cell…

Cell Signaling

It allows cells to perform various cellular activities, coordinate, and interact with other cells. All cells of an organism receive signals from their environments and respond accordingly. Even the unicellular eukaryotes receive signals secreted by other cells and respond. In the case of yeast, mating takes place by signaling between the yeast cells. Communication by cell signaling in a multicellular organism has become a vast and important part of various fields of biology.