30 Questions
What is the main function of epithelial tissue discussed in the text?
Protection
Which tissue type is responsible for providing impulse transmission?
Nervous tissue
What is the role of connective tissue according to the text?
Support
Which system involves the functional unit known as nephrons?
Excretory system
Which system of the body involves gulp secretion and reabsorption of water filtered through the henle loop of nephrons?
Digestive system
Which tissue type is specialized for moving the body and its parts through contraction and relaxation?
Muscle tissue
What is the primary function of dendrites in a neuron?
Receive information from neighboring neurons and transmit it to the neuron body
What feature increases the electrical conduction speed of neurons?
Myelin covering
Which part of a neuron is responsible for initiating voluntary movements like walking?
Cell body
What is a function of the Nerve System mentioned in the text?
Provides control of spinal cord reflexes
What is one of the characteristics of most neurons mentioned in the text?
They are single cells
What is the role of Schwann cells in a neuron?
Provide myelin covering
What is responsible for the conduction of nerve impulses in myelinated fibers?
Depolarization at Ranvier nodes
Which type of synapse releases neurotransmitters that cause action potentials in the postsynaptic cell?
Chemical synapse
How does electrical synaptic conduction differ from chemical synaptic conduction?
Chemical synapses are more common in the central nervous system
What happens when the threshold is exceeded in a synapse?
Depolarization
Why do myelinated fibers conduct electricity faster than unmyelinated fibers?
Jumping conduction at Ranvier nodes
What occurs when neurotransmitters are released into the synaptic cleft?
Stimulation of action potentials in the postsynaptic neuron
What is the primary function of glial cells in nervous tissue?
To aid nerve conduction
What is the net effect of the sodium-potassium ion pump?
Three Na+ ions leave the cell and two K+ ions enter
What is the term for when the inside of the membrane gains a more positive value than the outside?
Depolarization
Which ions are responsible for the action potential in muscle and nerve conduction?
Sodium and Potassium
What is the electrical property of the cell membrane when it is at rest?
Electrically charged
What is the term for the potential changes that occur in the membrane when the cells are active?
Action potential
What is the process called when the membrane potential returns to its resting state after depolarization?
Repolarization
What is the approximate threshold potential value that a neuron must reach for an action potential to be generated?
-55 mV
During which phase of an action potential does the permeability of the membrane to K+ ions increase?
Repolarization
What are the substances that transmit impulses at synapses called?
Neurotransmitters
What happens to the membrane potential during the depolarization period?
The membrane potential increases rapidly due to Na+ ions entering the cell
What are synapses in the context of neurons?
The spaces between neurons that enable communication
Test your knowledge of the course outline for the first week in Physiology class, covering topics such as Central Nervous System, Cardio-Vascular System, Respiratory System, Musculoskeletal Systems, Excretory System, Digestion, and more.
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