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Phys Ex 2 Spr 2012
Physiology exam 2 Spring 2012
| Question | Answer |
|---|---|
| 1) Steroids made from cholesterol 2) peptides made from amino acids 3) lipid based hormones interact with receptors on the cell membrane but not inside the cell. 4)hormones made from amino acids have long half lives 5)aldosterone is made from tyrosine | 1 and 2 |
| Which are true regarding neuron physio? | Graded potentials can be excitatory or inhibitory. Synaptic plasticity occurs throughout life |
| Regarding endocrine disruptors: | An example of endocrine disruptors that affect the androgen pathway are phthalates ,Endocrine disruptor exposure can be intentional or unintentional, The majority of chemicals registered in the U.S. have not been tested for health effects on humans. |
| Fast axonal transport is a mechanism for: | transferring cellular components between the cell body and axon terminal |
| This neuroglial cell type is only found in the CNS | astrocyte, oligodendrocyte, microglia |
| What is true concerning resting membrane potentials? | all cells have them, they are usually negative, they depend upon intracellular vs. extracellular concentrations of ions like Na and K |
| Regarding the sodium potassium pump... | it is found on cell membranes |
| Which of the following is true concerning graded potentials | they can exhibit spatial and temporal summation |
| Which of the following is true concerning action potentials? | they're initiated when a change in membrane potential reaches threshold at the axon hillock |
| Which of the following is the correct sequence of events just prior to neurotrans release? | depolarization of axon terminal Calcium enters cell exocytosis of synaptic vesicle |
| _____ is used as a neurotrans in the CNS and PNS | norepinephrine |
| ____ is when two or more graded potentials from different neurons combine | spatial summation |
| Which of the following is true concerning long term potentiation? | it acts by a change in membrane potential and 2nd messenger pathways |
| Regarding the blood-brain barrier | it is created by tight junctions produced by astrocytes |
| The brainstem is primarily important for | regulating autonomic functions |
| This structure connects the left and right hemispheres | the corpus callosum |
| The biggest difference between fish and primate brains is the | relative size of the forebrain |
| During a physical, an 18 year old male shows a positive Babinski sign when the physician rubs the reflex hammer along the sole of his foot. this is: | indicative of a problem with myelin sheath formation. |
| Which of the following is true: | axons with myelin sheaths conduct action potentials faster than axons without myelin sheaths |
| The ___ is involved with sensory integration and filtering whereas the ___ plays a major role in maintainence of homeostasis. | thalamus, hypothalamus |
| This scientist was one of the first to suggest that specific parts of the brain were responsible for specific cognitive functions and abilities (though he was wrong on the details) | Franz Gall |
| Which of the following are functions of the hypothalamus | monitoring body temperature, monitoring body osmolarity, trophic hormone secretion for regulating hormone release from the anterior pituitary. |
| The adrenal cortex produces steroids including ____ whereas the adrenal medulla produces catecholamines including: | aldosterone, epinephrine |
| In the assigned Hayes et. al paper on atrazine, the authors demonstrated that: | none of the given answers were demonstrated by Hayes. |
| Suppose someone has clinically excess levels of cortisol from the adrenal gland that is due to a tumor in the adrenal gland cells that produce cortisol. This pathology would be considered: | primary hypercorticolism |
| During embryonic development of the nervous system in vertebrates, the ___ becomes the central nervous system (CNS) and the ___ becomes the PNS: | neural tube, neural crest |
| During embryonic development of the nervous system in vertebrates, the cells that will become the nervous system are first identifiable as the: | neural plate |
| Regarding the required reading on dominance, politics, and physiology: | male supporters of Obama had stable testosterone levels following his election whereas male supporters of McCain had a decrease in testosterone following his loss to Obama |
| Where was the Stanton et. al 2009 study conducted? | North Carolina and Michigan |
| Which of the following bills have been introduced in this term in the Oklahoma legislature? | a bill banning food products from containing aborted human fetuses. an anti-masturbation ammendment to a personhood bill that declares "every sperm is sacred" multiple bills that challenge the scientific validity of evolution |
| Based on what you learned in lecture, following last weeks men's basketball game between UNC and Duke, Dr. Lovern's testosterone level | probably increased |
Created by:
jon.downs@okstate.edu
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