Glial cells - Study guides, Class notes & Summaries

Astrocytes - ️️glial, maintain ionic environment Lumbar - ️️hips and legs Tetrodoxin (TTX) - ️️- found in puffer fish ovaries - one could kill 30 adult humans - causes death via paralysis of respiratory muscles - fish has TTX resistant Na channels - irreversibly blocks channel Dermatomes - ️️spinal nerves innervate sections of the skin, message from certain section of skin is sent to certain section of spine - skin corresponds to spin 1. cervical 2. thoracic 3. lumbar...

What are the three main divisions of the developing brain? Forebrain Midbrain Hindbrain What is the forebrain (prosencephalon) divided into? Telencephalon Diencephalon What is the telencephalon composed of? Cerebral hemisphere and has structures like the cerebral cortex, white matter and basal ganglia What is the diencephalon composed of? Thalamus and hypothalamus What is the midbrain (mesencephalon) composed of? contains the cerebral peduncles, midbrain tectum, midbrain tegmentum ...

This layer of the meninges is tightly attached to the brain. Pia mater (menix) The _______ fissure separates the right and left cerebral hemispheres. Median longitudinal What is the purpose of the blood-brain barrier? Describe its maintenance from a cellular level. The blood-brain barrier is a diffusion barrier which prevents most particles from entering the central nervous system tissue, keeping the brain and spinal cord separate from general blood circulation. The blood-brain barrier is f...

NUR-631 Final Exam Study Guide 2023 (Questions With Complete Solutions Graded A+) fibers arise from nasal olfactory epithelium and form synapses with olfactory bulbs that transmit impulses to temporal lobe Hypoglossal nerve - ANSWER *XII* -stick out tongue -motor fibers to muscles of tongue and sensory impulse from tongue to brain -fibers arise from medulla and exit from skull and extend to tongue trigeminal nerve - ANSWER *V* -sensations of pain, touch, temperature, corneal reflex, clenc...

respiratory zone - correct answer respiratory bronchioles, alveolar ducts, alveoli What does the Respiratory Zone do? - correct answer Allow inhaled oxygen to diffuse into the lung capillaries in exchange for CO2. Conducting Zone - correct answer nose, pharynx, larynx, trachea, bronchi, bronchioles What does conducting zone do? - correct answer conducts air to respiratory zone, humidifies, warms, and filters air. Most common cancer mutation? - correct answer Acquired. What does anticholiner...

Which of the following medications are known as selective serotonin re-uptake inhibitors (SSRIs)? i. Nortriptyline ii. Citalopram iii. Duloxetine iv. Fluoxetine v. Venlafaxine vi. • Question 3 Which disease state of a non-adherent patient is at greater risk for substance use, violence, and victimization as well as worse overall quality of life? Schizophrenia Response Feedback: “Moreover, non-adherent patients with schizophrenia are at greater risk for substance use, violence, ...

When the presynaptic cell contacts a muscle cell, the synapse area is called a motor end plate. - ANSWER TRUE Briefly explain why the action potential flows only from the axon hillock to the terminal web. - ANSWER During the course of an action potential there is a refractory period that makes sure the action potential can't trigger backwards by the use of caps on gated sodium channels. The caps close and keeps the action potential flowing in one direction. How do the glial cells (i.e., m...

1. Which of the following tissues is always avascular? A) connective tissue D) epithelial tissue B) muscle tissue E) nervous tissue C) skeletal tissue Ans:  D Difficulty:  Medium 2. A scientist who examines tissue changes that might indicate disease is called a A) histologist. D) epidemologist B) radiologist. E) endocrinologist. C) pathologist. Ans:  C Difficulty:  Easy 3. The tissue lining body cavities is A) epithelial tissue. D) m...

sodium potassium pump - ️️enzyme that transports 3 sodium to the outside, and it transports 2 potassium to the inside using the hydrolysis of ATP - creates more sodium outside and more potassium inside and creates a concentration gradient Midline, ipsilateral and contrelateral - ️️line separating left and right of the entire nervous system - ipsilateral means the same side of something and contralateral means the opposite side of something Nissl stain showed (Nissl) - ️️Nissl u...

Which of the following is NOT a function of the autonomic nervous system? -innervation of glands -innervation of skeletal muscle -innervation of cardiac muscle -innervation of smooth muscle of the digestive tract innervation of skeletal muscle The large commissure that connects the right and left sides of the brain is called the ________. corpus callosum Over 90% of all parasympathetic fibers are derived from cranial nerve ________. X (vagus) In carpal tunnel syndrome, ther...