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BIO 2301 EXAM 4 QUESTIONS AND VERIFIED ANSWERS

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BIO 2301 EXAM 4 QUESTIONS AND VERIFIED ANSWERS

Institution
BIO 2301
Course
BIO 2301

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ureters


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Tunes coming from each kidney to the urinary bladder. Goes behind and
under the bladder to prevent backflow of urine.




Parietal cells


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produce HCl and intrinsic factor




HCl

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-activates pepsinogen to pepsin
-kills bacteria ingested w/ food
-denatures proteins




Micturition reflex


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-Baroreceptors stretch
-Signal sent to pons
-Micturition center in pons signals down spinal cord to pelvic nerves
controlling the detrusor and internal sphincter.
-Parasympathetic stimulation of pelvic nerves causes detrusor contraction
and internal urethral relaxation




Estrogen


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Under influence of FSH, produced by follicle cells. Induces ovulation




PRogesterone


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, Produced by the corpus luteum under the influence of LH. Ovulation
stimulates production of this.




heat retention


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1. Decreased sweating
2. Peripheral vasoconstricition
3. Increased insulation
4. Piloerection
5. Shivering




Gastric emptying


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The movement of acidic chyme from the stomach through the pyloric
sphincter into the duodenum.
-Peristaltic contraction pushes it out.
-Inhibited by intestinal phase




loop of henle reabsorption


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, -countercurrent multiplier system
-descending limb: permeable to water, impermeable to solutes
-ascending limb: impermeable to water, active transport permability of Na+,
Cl-, K+




Spermatogonium


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Diploid, 46 chromosomes. The stem cell that gives rise to sperm cells.
Divide by mitosis to form primary spermatocytes.




Mucous neck cells


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Produce the mucus that protects the lining of the stomach from HCL and
development of ulcers.




small intestine


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Complete digestion of carbs, proteins, and fats. Absorbs nutrients.




Vitamin e

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Institution
BIO 2301
Course
BIO 2301

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