1. A unicellular protest may use a contractile vacuole to expel
... e. None of the above. 28. After the depolarization of an action potential, the fall in the membrane potential occurs due to the a. Closing of sodium inactivation gates. b. Closing of potassium and sodium channels. c. Refractory period in which the membrane is hyperpolarized. d. Opening of voltage-ga ...
... e. None of the above. 28. After the depolarization of an action potential, the fall in the membrane potential occurs due to the a. Closing of sodium inactivation gates. b. Closing of potassium and sodium channels. c. Refractory period in which the membrane is hyperpolarized. d. Opening of voltage-ga ...
Islamic University
... * blood is a type of -----------------------tissue * the --------------------------nervous system is the house keeping system * the specific cell that responds to chemicals dissolved in saliva is called----------* each axonal terminal is separated from the next neuron by----------------------* serou ...
... * blood is a type of -----------------------tissue * the --------------------------nervous system is the house keeping system * the specific cell that responds to chemicals dissolved in saliva is called----------* each axonal terminal is separated from the next neuron by----------------------* serou ...
Bio 103 Lecture Outline:
... - cell bodies of sensory neurons whose axons conduct impulses inward from peripheral body parts Ventral root (anterior or motor root) - axons of motor neurons whose cell bodies are in spinal cord Spinal Nerve – union of ventral and dorsal roots Nerve Plexus – complex networks formed by anterior bran ...
... - cell bodies of sensory neurons whose axons conduct impulses inward from peripheral body parts Ventral root (anterior or motor root) - axons of motor neurons whose cell bodies are in spinal cord Spinal Nerve – union of ventral and dorsal roots Nerve Plexus – complex networks formed by anterior bran ...
Bio 103 Lecture Outline:
... - cell bodies of sensory neurons whose axons conduct impulses inward from peripheral body parts Ventral root (anterior or motor root) - axons of motor neurons whose cell bodies are in spinal cord Spinal Nerve – union of ventral and dorsal roots Nerve Plexus – complex networks formed by anterior bran ...
... - cell bodies of sensory neurons whose axons conduct impulses inward from peripheral body parts Ventral root (anterior or motor root) - axons of motor neurons whose cell bodies are in spinal cord Spinal Nerve – union of ventral and dorsal roots Nerve Plexus – complex networks formed by anterior bran ...
Day 4 - Scott County Schools
... neurotransmitters carry impulses across the synapse. When a nerve impulse arrives at the end of an axon, neurotransmitters are released. They travel across the synapse to a dendrite of another neuron. The neurotransmitters bind to the membrane of the dendrite, triggering a nerve impulse in the next ...
... neurotransmitters carry impulses across the synapse. When a nerve impulse arrives at the end of an axon, neurotransmitters are released. They travel across the synapse to a dendrite of another neuron. The neurotransmitters bind to the membrane of the dendrite, triggering a nerve impulse in the next ...
CHAPTER 10: NERVOUS SYSTEM I
... Refractory Period = the period following an impulse when a threshold stimulus cannot produce another impulse. a. The RMP has to be restored before it can be depolarized again (i.e. dominos must be set back up, in order to be knocked down again) ...
... Refractory Period = the period following an impulse when a threshold stimulus cannot produce another impulse. a. The RMP has to be restored before it can be depolarized again (i.e. dominos must be set back up, in order to be knocked down again) ...
Hearing and Equilibrium Human Ear Major questions Anatomy of
... • 3 bones can buckle, change tension of tympanic membrane and position of stapes on OW (tympanic reflex) ...
... • 3 bones can buckle, change tension of tympanic membrane and position of stapes on OW (tympanic reflex) ...
UNIT 4: Sensation and Perception I. Overview A. Sensation
... brain temporal lobe’s primary smell cortex and to the parts of the limbic system b. Chemical sense c. No one distinct receptor for one distinct odor; combo instead ...
... brain temporal lobe’s primary smell cortex and to the parts of the limbic system b. Chemical sense c. No one distinct receptor for one distinct odor; combo instead ...
Sensory Pathways and the Somatic Nervous System
... cortex and reaches our awareness The Somatic Nervous System (SNS)—the somatic motor system Controls contractions of skeletal muscles The Autonomic Nervous System (ANS)—the visceral motor system Controls visceral effectors, such as smooth muscle, cardiac muscle, and glands ...
... cortex and reaches our awareness The Somatic Nervous System (SNS)—the somatic motor system Controls contractions of skeletal muscles The Autonomic Nervous System (ANS)—the visceral motor system Controls visceral effectors, such as smooth muscle, cardiac muscle, and glands ...
How your brain and nervous system work
... • Recall that the gap between neurones is called a synapse. • Describe how an impulse triggers the release of a transmitter substance in a synapse and how it diffuses across to bind with receptor molecules in the membrane of the next neurone causing the impulse to continue. ...
... • Recall that the gap between neurones is called a synapse. • Describe how an impulse triggers the release of a transmitter substance in a synapse and how it diffuses across to bind with receptor molecules in the membrane of the next neurone causing the impulse to continue. ...
Chapter 04: The Action Potential
... Membrane Potential (potential difference across the plasma membrane) at which the net flow of an ion type = zero The number of ions moving into the cell = the number of ions moving out of the cell for a particular species of ion ...
... Membrane Potential (potential difference across the plasma membrane) at which the net flow of an ion type = zero The number of ions moving into the cell = the number of ions moving out of the cell for a particular species of ion ...
Slide 1
... Ependymal cells (CNS) Oligodendrocytes (CNS) Satellite cells (PNS) Schwann cells (PNS) ...
... Ependymal cells (CNS) Oligodendrocytes (CNS) Satellite cells (PNS) Schwann cells (PNS) ...
Chapter 9
... Stimulation of a membrane can locally affect its__________________. When the membrane potential becomes_____________, the membrane is depolarized. If sufficiently strong depolarization occurs, a threshold potential is ...
... Stimulation of a membrane can locally affect its__________________. When the membrane potential becomes_____________, the membrane is depolarized. If sufficiently strong depolarization occurs, a threshold potential is ...
03/14 PPT
... Plan: monitor neural activation in the brain Technologies: calcium-sensitive dyes, voltage-sensitive dyes and intrinsic signals (changes in blood flow, oxygen levels) Results: •Odors activate a few glomeruli •Same glomeruli activated on repeated exposure •Different odors activate different glomeruli ...
... Plan: monitor neural activation in the brain Technologies: calcium-sensitive dyes, voltage-sensitive dyes and intrinsic signals (changes in blood flow, oxygen levels) Results: •Odors activate a few glomeruli •Same glomeruli activated on repeated exposure •Different odors activate different glomeruli ...
The Auditory Pathway: Transmission between Hair Cells and Eighth
... Neuronal signaling in the auditory pathway begins with the spiral ganglion neurons that receive transmitter released from hair cells and send their central axons to the cochlear nucleus of the brainstem. Many decades of single fiber recordings have catalogued the acoustic responses of these primary ...
... Neuronal signaling in the auditory pathway begins with the spiral ganglion neurons that receive transmitter released from hair cells and send their central axons to the cochlear nucleus of the brainstem. Many decades of single fiber recordings have catalogued the acoustic responses of these primary ...
10-21-09
... (Extinction eliminates this firing.) Next, they sought to relate the firing to performance. All-or-none burst firing, typical of the neuron population, predicted successful tone detection. This pattern is consistent in all neurons that show the bursting response. Next experiments involved ERPs in hu ...
... (Extinction eliminates this firing.) Next, they sought to relate the firing to performance. All-or-none burst firing, typical of the neuron population, predicted successful tone detection. This pattern is consistent in all neurons that show the bursting response. Next experiments involved ERPs in hu ...
The peripheral nerves
... instructions to smooth muscle, cardiac muscle, glands, and other peripheral effectors. ...
... instructions to smooth muscle, cardiac muscle, glands, and other peripheral effectors. ...
bio 342 human physiology
... a) Second order neurons are located in the dorsal column nuclei b) Axons of first order neurons travel in the spinothalamic tract c) Axons of first order neurons decussate (cross the midline) in the spinal ...
... a) Second order neurons are located in the dorsal column nuclei b) Axons of first order neurons travel in the spinothalamic tract c) Axons of first order neurons decussate (cross the midline) in the spinal ...
Understanding the Transmission of Nerve Impulses
... called ions. The important ions in the nervous system are sodium and potassium (both have 1 positive charge, +), calcium (has 2 positive charges, ++) and chloride (has a negative charge, ‐). There are also some negatively charged protein molecules. It is also importan ...
... called ions. The important ions in the nervous system are sodium and potassium (both have 1 positive charge, +), calcium (has 2 positive charges, ++) and chloride (has a negative charge, ‐). There are also some negatively charged protein molecules. It is also importan ...
Schwann cells - Mayfield City Schools
... Ependymal cells (CNS) Oligodendrocytes (CNS) Satellite cells (PNS) Schwann cells (PNS) ...
... Ependymal cells (CNS) Oligodendrocytes (CNS) Satellite cells (PNS) Schwann cells (PNS) ...
Why light
... The receptors use a lot of energy. It’s more efficient to supply the nutrient-carrying blood to the receptors from the back of the eye. Blood supply to the retina is not shown in this figure. ...
... The receptors use a lot of energy. It’s more efficient to supply the nutrient-carrying blood to the receptors from the back of the eye. Blood supply to the retina is not shown in this figure. ...
Purinergic signalling in neuroregeneration
... Purinergic signalling in neuroregeneration Purinergic signalling, adenosine 5′-triphosphate (ATP) as an extracellular signalling molecule, was proposed in 1972 (Burnstock, 1972). However, it was not generally accepted until the early 1990s when receptors for ATP and its breakdown product adenosine w ...
... Purinergic signalling in neuroregeneration Purinergic signalling, adenosine 5′-triphosphate (ATP) as an extracellular signalling molecule, was proposed in 1972 (Burnstock, 1972). However, it was not generally accepted until the early 1990s when receptors for ATP and its breakdown product adenosine w ...
Stimulus (physiology)
In physiology, a stimulus (plural stimuli) is a detectable change in the internal or external environment. The ability of an organism or organ to respond to external stimuli is called sensitivity. When a stimulus is applied to a sensory receptor, it normally elicits or influences a reflex via stimulus transduction. These sensory receptors can receive information from outside the body, as in touch receptors found in the skin or light receptors in the eye, as well as from inside the body, as in chemoreceptors and mechanorceptors. An internal stimulus is often the first component of a homeostatic control system. External stimuli are capable of producing systemic responses throughout the body, as in the fight-or-flight response. In order for a stimulus to be detected with high probability, its level must exceed the absolute threshold; if a signal does reach threshold, the information is transmitted to the central nervous system (CNS), where it is integrated and a decision on how to react is made. Although stimuli commonly cause the body to respond, it is the CNS that finally determines whether a signal causes a reaction or not.