Bio 169 final exam Study guides, Class notes & Summaries

What causes a long absolute refractory period in cardiac muscle? What does the length of the refractory period prevent? A long absolute refractory period is due to the influx of ca+ ions, creating the plateau phase. This phase is to prevent an excessive amount of action potentials in a certain time frame. What are the four phases of the cardiac cycle and what is happening in each? 1. Ventricular filling- Blood flows through the tricuspid valve and fills the ventricles. 2. Isovolumetric filli...

give an example of a water-soluble hormone - ANSWEROxytocin give an example of a lipid-soluble hormone - ANSWERtestosterone adenylate cyclase produces the second messenger _____, when the G-Protein has _______ and is bound to it. - ANSWERcAMP, GTP TRUE / FALSE The hypothalamus directly controls the pituitary gland? - ANSWERTrue The Posterior lobe is considered to be part of the (nervous or endocrine) system - ANSWERNervous Hypothalamus releases ________ - ANSWERTRH (...

Bio 169 Final exam Study Guide with complete solutions Erythropoietin - Answer️️ -Is secreted by the kidney The function of the pericardial fluid is to - Answer️️ -reduce friction between the pericardial membranes Match the type of chemical messenger with its description. - Answer️️ -Autocrine: stimulates the cell that originally secreted it Endocrine: secreted by glands and cells; acts upon distant target tissues Paracrine: secreted by one cell; acts upon nearby cells Neuro...

BIO 169 Final Exam (compiled) Questions and Answers 100% pass give an example of a water-soluble hormone - Answer️️ -Oxytocin give an example of a lipid-soluble hormone - Answer️️ -testosterone adenylate cyclase produces the second messenger _____, when the G-Protein has _______ and is bound to it. - Answer️️ -cAMP, GTP TRUE / FALSE The hypothalamus directly controls the pituitary gland? - Answer️️ - True The Posterior lobe is considered to be part of the (nervous or e...

BIO 169 Final Exam Questions and Answers | 100% Pass What are the functions of the endocrine system? - Answer️️ -controls - reproduction, metabolism, growth/development, fluid/electrolyte balance, resistance to stress What are paracrine secretions? Traits? - Answer️️ -Local hormone that enters interstitial fluid but affects only neighboring cells. Potent and secreted in small amounts, only when needed. They break down quickly. What hormones are secreted by the anterior pituitary g...

What characteristic of life involves the removal of waste products that result from metabolic processes? - excretion What is the smallest level of structural organization in the human body? - chemical level In laboratory, you will study tissues. This area of study is known as: - histology Which organ system produces movement and generates heat? - muscular system What part of a feedback loop causes physiological responses to return the variable to the normal homeostatic range? - effec...

Tetracycline is an antibiotic used to treat infections. It binds with bacterial ribosomes and inhibits the tRNA molecule from binding to the ribosome. What process is interrupted? - Answer translation Which of the following is a yellow-orange skin pigmet? - Answer carotene Thomas is deaf, but can feel the vibrations of music through sensory receptors in his skin called: - Answer lamellated (Pacinian) corpuscles

Which of these is used clinically to impede or prevent blood clotting? heparin All the circulating red blood cells in an adult originate in the red bone marrow The total volume of blood in the body of a 76-kg man is approximately ________________ liters. 5.3 In adults, erythropoiesis exclusively takes place in red bone marrow A substance that activates plasminogen might be useful to cause clot dissolution to proceed faster Tissue factor is a factor in the ____________ pathway. extrinsic Th...

What characteristic of life involves the removal of waste products that result from metabolic processes? excretion What is the smallest level of structural organization in the human body? chemical level In laboratory, you will study tissues. This area of study is known as: histology Which organ system produces movement and generates heat? muscular system What part of a feedback loop causes physiological responses to return the variable to the normal homeostatic range? effector Which organ s...

The ___ is the first segment of the small intestine when bile and pancreatic juice are mixed into the chyme leaving the stomach duodenum which of the following sphincters is voluntary external anal sphincter the conversion of pepsinogen into the active form, pepsin, requires an acidic pH bacterial flora carry out all of the following except digest most of the proteins we get in diet defecation is stimulated by distension (stretching) of the rectum which process is not a main function of the...