Human Physiology - Chemical Coordination Questions

Biology

Human Physiology - Chemical Coordination Solutions

An elevation of homocysteine and a decrease in cysteine would most likely be present due to which of the following deficiencies? A) Loss of function of cystathionine-B synthase B) Cobalamin deficiency C) Tetrahydrobiopterin (BH4) deficiency D) Loss of function of methionine synthase

Biology

Human Physiology - Chemical Coordination Solutions

Which one of the following statements is incorrect? A) Somatostatin inhibits release of somatotropin. B) Melanocyte stimulating hormone is a satiety signal in the brain. C) In a patient with an over-secreting tumor of ACTH cells in the anterior pituitary, levels of CRH secretion should be low. D) Cortisol stimulates glycogen breakdown in the liver. E) Growth hormone has both tropic and non-tropic effects.

Biology

Human Physiology - Chemical Coordination Solutions

Which one of the following is the most likely explanation for hypothyroidism in a patient whose dietary iodine consumption is normal? A) greater secretion of T3 than T4. B) Grave's disease. C) reduced iodine excretion by the kidney. D) under-secretion of thyroid-stimulating hormone. E) over-secretion of thyrotropin releasing hormone.

Biology

Human Physiology - Chemical Coordination Solutions

What is the difference between sensation and perception? A. Perception refers to what goes on in the sensory organs and sensation is what happens in the brain. B. Sensation is the interpretation of sensory information and perception is the detection of sensory stimuli. C. Sensation is the detection of sensory stimuli and perception is the interpretation of sensory information. D. Nothing. They are the same thing.

Biology

Human Physiology - Chemical Coordination Solutions

QUESTION 3 Hypothalamus A Anterior Pituitary D 1 B C Cortisol The following options relate to the diagram above. Use them to answer the questions. What is (A) in the diagram? A. Adrenal cortex What is (B) in the diagram? B. Adrenal medulla What is (C) in the diagram? C. Corticotrophin (ACTH) What is (D) in the diagram? D. Corticotrophin Releasing Hormone (CRH) E. Negative feedback F. Positive feedback G. Thyroid stimulating hormone (TSH) H. Adrenaline

Biology

Human Physiology - Chemical Coordination Solutions

Question 18 3 pts G protein-coupled activation of phospholipase C directly generates which second messenger? o both inositol-1,4,5-trisphosphate and calcium o both diacylglycerol and inositol triphosphate O diacylglycerol O calcium O inositol triphosphate

Biology

Human Physiology - Chemical Coordination Solutions

10:43 1.00 KB/S Vol WiFi 76% III Chegg Time remaining: 01:59:55 Chemistry 3 pts Question 17 Calmodulin is a(n): O allosteric activator of calcium-dependent enzymes O cell surface calcium receptor O calcium-dependent enzyme O allosteric inhibitor of calcium-dependent enzymes o regulatory subunit of calcium-dependent enzymes

Biology

Human Physiology - Chemical Coordination Solutions

3.Your roommate claims that he has been much more successful in getting attention from the opposite sex since he started adding a pheromone to his aftershave. What is the most likely explanation for this perceived increase in attention? The pheromones do actually make him more attractive to the opposite sex. The additive allows for the pheromones to spread over a wider area and influence more people. He is producing higher levels sex pheromones naturally in response to the chemicals in the additive. . The women he is meeting are using pheromone-laced perfume,which increasestheir socio-sexual behaviors. The placebo effect.

Biology

Human Physiology - Chemical Coordination Solutions

Chronic stress can have negative effects. Mark all of the true statements about chronic stress and elevated glucocorticoid levels. it can increase risk of heart attack, stroke, and diabetes it helps us remember things much better it can influence some of the same brain regions that are associated with certain disorders it can shrink dendrites and kill neurons

Biology

Human Physiology - Chemical Coordination Solutions

Why is chronic stress more of a problem for our bodies than acute stress? O in chronic stress, we have positive feedback from the SAM system continuing to activate itself over and over and over again, leading to continually increasing levels of E/NE circulating in the blood, which have negative effects on our bodies. O it's not - they are equally problematic. O in chronic stress, negative feedback from the stressor going away does not occur and thus doesn't quiet down the HPA axis. So, the HPA axis continues to cause elevated release of stress hormones, and stress hormones have negative effects on our bodies. O in chronic stress, negative feedback from the stressor going away does not quiet down the SAM system. So, elevated levels of E/NE circulate in the blood, which have negative effects on our bodies.

Biology

Human Physiology - Chemical Coordination Solutions

Match the brain structure with the hormone it releases (mark all that are correct). o posterior pituitary; oxytocin O PVN; tropic hormone (e.g. ACTH) anterior pituitary, tropic hormone (e.g. ACTH) O PVN; releasing hormone (e.g. CRH)

Biology

Human Physiology - Chemical Coordination Solutions

What happens after an acute stressor goes away (assuming you don't get eaten or similar)? O the PVN activates the SAM system which makes us fight or flee. the PVN is activated by inputs from the PFC/hippocampus, which increases the release of CRH, ACTH, and ultimately cortisol O positive feedback O the PVN is inhibited by inputs from the PFC/hippocampus, which ends the release of CRH, ACTH, and ultimately cortisol