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What is Grey matter? Where is it found?
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CSULB BIO 205 Exam2
This is a study stack for CSULB BIO 205 exam #2
| Question | Answer |
|---|---|
| What is White Matter? Where is it found? | White Matter is composed of mylinated axon (gliel) cells. It is a fatty tissue. It is found in one region of cerebum to another and between Cerebum and lower brain centers |
| What is Grey matter? Where is it found? | Grey Matter is a major part of the central nervous system. Consists of neronal cell bodies. It is found in the central nervous system. |
| What is the difference between Grey and White matter? | Grey = composed of cell bodies and found throughout CNS White = Composed of mylinated tissue, found primarily in brain. |
| What parts does a neuron have? | Cell body, Nucleus, Dendrites, Axon Terminal, Nissl Body, Axon Hillcock, Synapse |
| What is the purpose of a dendrite? | To process signals that are generated at the thousands of synapses on them |
| What is the purpose of an axon? | The main purpose of the axon is to send impulses away from the cell body to a neuron dendrite or other body cells |
| What is the purpose of an axon terminal? | is found at end of Axon and it forms a synapse with another neuron. Generally, it is the point where one neuron passes info to another |
| What is a Nissl Body? | Nissl body are large granular bodies found in the Neurons. These are rough endoplasmic reticulum and are the site of protein synthesis |
| What is the purpose of an axon hillock? | it is a specialized part of neuron that connects cell body to the axon |
| What is the purpose of synapse? | Facilitate communication between neuron cells |
| What is the purpose of a schwann cell? Where are they found? | Schwann cells are found in the peripheral nervous system. Their primary purpose is to produce myelin. The myelin produced by the schwann cells insulate and protect the axon. It also improves the speed at which info is transmitted. |
| What is the purpose of the nodes of Ranvier? | The gaps between the myelin sheaths of different cells. |
| What is the purpose of the Gyrus and Sulcus? | To increase the surface area of the brain because the surface of hte brain is where the majority of actual brain cells reside. So the more surface area the more cells the more complex computing ability. By increasing the surface are |
| What is the purpose of the frontal lobe? | Frontal lobes are involved in motor function, personality, problem solving, spontaneity, memory, language, impulse control, social and sexual behavior |
| What is the purpose of the parietal lobe? | The parietal lobe is responsible for collecting and interpreting sensory information. |
| What is the purpose of the temporal lobe? | The temporal lobes are responsible for hearing, memory, meaning and language. also play a role in emotions and learning. |
| What is the purpose of the Occipital lobe? | The occipital lobe is responsible for processing all the visual information. |
| What is the cerebellum responsible for? | The cerebeullum is the largest part of the brain and is responsible for coordinating movements, planning, motor activities, muscle memory, thoughts, and regulating body functions |
| What is the purpose of the brain stem? | The purpose of the brain stem is to connect spinal cord and brain. It sends all info from peripheral nervous system to the central nervous system and vice-versa |
| What is the Central sulcus? | it is the fold in the brain that separates the frontal and parietal lobes. |
| What is the purpose of a paccinian corpuscle? | It is a touch receptor in the skin |
| What is the purpose of a Meissner Corpuscle? | It is a touch receptor in the skin |
| What is the difference between a Paccinian corpuscle and a Meissner Corpuscle ? | Paccinian corpuscle = Deep pressue Meissner = more superficial |
| Name the Hormones of the posterior pituitary | Oxytocin, Anti diuretic hormone |
| What does Oxytocin do? | Contracts uterus during birth, shoots milk out of breast |
| What is the function of Anti diuretic hormone (ADH)? | Conserves water |
| What are the hormones of FLATPG? aka anterior pituitary | Follical stimulating hormone, Luteinizing Hormone, Adrenal Cortico Trophic, Thyroid Stimulating hormone, Prolactin, Growth Hormone |
| What is the function of Folical Stimulating Hormone (FSH)? | something to do with ovaries and testes |
| What is the function of Luteinizing Hormone (LH)? | Something else with ovaries and testes |
| What is the function of Adrenal Cortico Trophic (ACT)? | Goes to adrenal gland, releases gluco corticoids |
| What is the function of Thyroid Stimulating Hormone (TSH)? | Stimulates the production oc Calcetonin in the thyroid gland, stimulates the production of para thyroid hormone in the parathyroid gland |
| What is the function of Prolactin ? | Creates milk (?) |
| What is the function of the Growth Hormones (GH)? | to grow (ADDD TOOOOOO!!!) |
| When discussing the origins of the sympathetic and parasympathetic divisions of the autonomic nervous system, we can most correctly state that ________. = The parasympathetic nerves arise from the brain and part of the spinal cord, and all of the sympathe | |
| True or False? = In general, the neurotransmitter of the sympathetic nervous system is norepinephrine, and the neurotransmitter of the parasympathetic nervous system is acetylcholine. | |
| A certain drug prevents a neurotransmitter from initiating a response in the receiving neuron. Which of the following statements best describes the mechanism by which the drug may be acting? = The drug is preventing the neurotransmitter from binding to i | |
| The part of the nerve cell responsible for origination of the nerve impulse is the ________. = axon hillock, because this is the specific area of the nerve cell that generates the electrical impulse | |
| When speaking of glial cells, we can correctly say that ________. = Schwann cells are glial cells found outside the brain and spinal cord; oligodendrocytes are glial cells found in the brain and spinal cord | |
| What does saltatory conduction mean? = Saltatory conduction means that the nerve impulse seems to jump from one node to the next—and is regenerated as it speeds along. | |
| The striated, or striped, appearance of skeletal muscles is caused by which of the following? = myofibrils | |
| According to the sliding filament model of muscle contraction, ________________. | |
| = actin slides along myosin | |
| Which of the following is smallest? - Actin Filament | |
| Tropomyosin-troponin complex controls muscle contraction by ____________. = Covering the myosin heads | |
| What chemical causes the permeability of the muscle cell membrane to change? - Acetylcholine | |
| When does wave summation occur? = When a scond stimulus is recieved before hte muscle relaxes |
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