Nervous System
... another is a microscopic space called a synapse. Myelinated nerves have a faster signal than nonmyelinated ...
... another is a microscopic space called a synapse. Myelinated nerves have a faster signal than nonmyelinated ...
Nervous System Structure and Function Pt 1
... • As a result of active transport (K+ in, Na+ out) and diffusion (K+ out, Na+ in), a negative charge builds up on the inside of the membrane and a positive charge builds up on the outside of the membrane. • The difference in electrical charge across the cell membrane of a resting neuron is called is ...
... • As a result of active transport (K+ in, Na+ out) and diffusion (K+ out, Na+ in), a negative charge builds up on the inside of the membrane and a positive charge builds up on the outside of the membrane. • The difference in electrical charge across the cell membrane of a resting neuron is called is ...
refractory period
... electromagnetic), or chemical signals released by neurons and received by other neurons, muscle cells or gland cells. ...
... electromagnetic), or chemical signals released by neurons and received by other neurons, muscle cells or gland cells. ...
chapter29_Sections 6
... • Nicotine blocks brain receptors for ACh • Caffeine blocks receptors for adenosine • Cocaine prevents reuptake of dopamine, serotonin, and norepinephrine from synaptic clefts • Amphetamines increase secretion of serotonin, norepinephrine, and dopamine in the brain ...
... • Nicotine blocks brain receptors for ACh • Caffeine blocks receptors for adenosine • Cocaine prevents reuptake of dopamine, serotonin, and norepinephrine from synaptic clefts • Amphetamines increase secretion of serotonin, norepinephrine, and dopamine in the brain ...
Human Anatomy and Physiology, Nervous System and Special
... Motor or _______________; motor neurons to skeletal muscles Association or ___________________________; connect sensory and motor in CNS; = 99% of neurons 9. Rationalize the structures of pain, deep pressure, and stretch receptors. ________: branched, uncovered near the surface for sensitivity Deep ...
... Motor or _______________; motor neurons to skeletal muscles Association or ___________________________; connect sensory and motor in CNS; = 99% of neurons 9. Rationalize the structures of pain, deep pressure, and stretch receptors. ________: branched, uncovered near the surface for sensitivity Deep ...
REGULATION
... chemical control (all organisms). A. Nerve controlnerve control depends mainly on the functioning of the neurons (nerve cells). ...
... chemical control (all organisms). A. Nerve controlnerve control depends mainly on the functioning of the neurons (nerve cells). ...
PowerPoint to accompany Hole’s Human Anatomy and
... • Picks up sensory information and delivers it to the CNS • Motor Division • Carries information to muscles and glands • Divisions of the Motor Division: • Somatic – carries information to skeletal muscle • Autonomic – carries information to smooth muscle, cardiac muscle, and glands ...
... • Picks up sensory information and delivers it to the CNS • Motor Division • Carries information to muscles and glands • Divisions of the Motor Division: • Somatic – carries information to skeletal muscle • Autonomic – carries information to smooth muscle, cardiac muscle, and glands ...
ch 48 clicker questions
... conduction velocity for moving action potentials is likely seen in a) a large-diameter, nonmyelinated axon. b) a small-diameter, nonmyelinated axon. c) A myelinated axon. d) any of the above, as all neurons conduct action potentials at the same speed. ...
... conduction velocity for moving action potentials is likely seen in a) a large-diameter, nonmyelinated axon. b) a small-diameter, nonmyelinated axon. c) A myelinated axon. d) any of the above, as all neurons conduct action potentials at the same speed. ...
Neuron communication
... when you don’t have enough (ex: Depression is caused by low levels of serotonin.) ...
... when you don’t have enough (ex: Depression is caused by low levels of serotonin.) ...
Synaptic transmission
... • In these, the first neuron secretes at its nerve ending synapse a chemical substance called a neurotransmitter (or often called simply transmitter substance), and this transmitter in turn acts on receptor proteins in the membrane of the next neuron to excite the neuron, inhibit it, or modify its s ...
... • In these, the first neuron secretes at its nerve ending synapse a chemical substance called a neurotransmitter (or often called simply transmitter substance), and this transmitter in turn acts on receptor proteins in the membrane of the next neuron to excite the neuron, inhibit it, or modify its s ...
Chapter 6
... Occurs when sensory receptors are subjected to an unchanging stimulus o Receptor membranes become less responsive o Receptor potentials decline in frequency or stop. Adaptation occurs in the receptor, not the CNS Tonic receptors o Do not adapt at all or very slowly, important when maintaining ...
... Occurs when sensory receptors are subjected to an unchanging stimulus o Receptor membranes become less responsive o Receptor potentials decline in frequency or stop. Adaptation occurs in the receptor, not the CNS Tonic receptors o Do not adapt at all or very slowly, important when maintaining ...
Biology Cells unit: LT8 Review
... Now that you have some background about neurons and action potentials, work on the original learning target. I can use a neuron to describe how passive and active transport work together to maintain homeostasis. ...
... Now that you have some background about neurons and action potentials, work on the original learning target. I can use a neuron to describe how passive and active transport work together to maintain homeostasis. ...
01.22.10 Lecture 5: Membrane transport
... Ion channels have ion selectivity - they only allow passage of specific molecules ...
... Ion channels have ion selectivity - they only allow passage of specific molecules ...
NS Review
... 23. During a what**** potential the cell is negative outside & positive inside? 24. During depolarization the blank *** channels open. 25. The Na/K pump reestablishes the what *** potential. 26. A bruise to the brain which could be mild to severe is called what? 27. The substance released at axonal ...
... 23. During a what**** potential the cell is negative outside & positive inside? 24. During depolarization the blank *** channels open. 25. The Na/K pump reestablishes the what *** potential. 26. A bruise to the brain which could be mild to severe is called what? 27. The substance released at axonal ...
Electrical Communication #2
... Otto Loewi showed that these links are primarily chemical by placing two frog hearts in bath solution, innervating only one of them, and then observing that both hearts are affected. In that particular case, the chemical was acetylcholine, and it was causing the hearts to slow down their beating. Th ...
... Otto Loewi showed that these links are primarily chemical by placing two frog hearts in bath solution, innervating only one of them, and then observing that both hearts are affected. In that particular case, the chemical was acetylcholine, and it was causing the hearts to slow down their beating. Th ...
NAS 150 The Skeletal System Brilakis Fall, 2003
... lamellae are lacuna which contain the trapped osteocytes. Osteons are arranged in bundles in the bone, with the whole bone surrounded by periosteum. Spongy Bone is found in the epiphyses of long bones, lining the medullary cavity and in large quantity in the short, flat and irregular bones. Spongy B ...
... lamellae are lacuna which contain the trapped osteocytes. Osteons are arranged in bundles in the bone, with the whole bone surrounded by periosteum. Spongy Bone is found in the epiphyses of long bones, lining the medullary cavity and in large quantity in the short, flat and irregular bones. Spongy B ...
Your Name Here______________________________
... 10. A group of neuronal cell bodies (cytons) in the PNS is called a a. nucleus b. tract c. ganglion d. nerve e. nerve fiber 11. The type of neuroglial cells that line the ventricles of the brain and produces cerebrospinal fluid are a. astrocytes b. oligodendrocytes c. ependyma d. microglia e. Schwan ...
... 10. A group of neuronal cell bodies (cytons) in the PNS is called a a. nucleus b. tract c. ganglion d. nerve e. nerve fiber 11. The type of neuroglial cells that line the ventricles of the brain and produces cerebrospinal fluid are a. astrocytes b. oligodendrocytes c. ependyma d. microglia e. Schwan ...
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.