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MPP 3202 Final Exam (exam 5) 193 correct
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Homeostasis is the ability of the body to - ANSWER quickly restore changed conditions to normal
_____ and _____ are often regulators of effectors in most feedback loops. - ANSWER Hormones, nerves
Saturation occurs when - ANSWER Carrier protein is operating at its maximum rate
Ion channels that can be opened by physiological stimuli are said to be - ANSWER Gated
Which of the following is NOT true of diffusion in the human body? - ANSWER Smaller molecules take
longer to diffuse than larger ones
Can be specialized for exchange of material - ANSWER Epithelial tissue
Conducts signals via electrical and chemical signals - ANSWER nervous tissue
Sequence the following events in the aerobic respiration of glucose
1. Synthesis of ATP due to oxidative phosphorylation
2. Generation of pyruvate from glucose
3. Conversion of glucose to glucose-6-phosphate
4. Acetyl CoA initiates the Krebs cycle - ANSWER 3,2,4,1
Which of the following statements is NOT TRUE concerning the small intestine - ANSWER The contents
of the small intestine are external enviorment
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Aerobic metabolism of glucose - ANSWER Requires oxygen and produces more ATP per glucose than
anaerobic pathways
Which of the following statements is NOT TRUE? - ANSWER The adrenal cortex secretes epinephrine
Most target organ control on the anterior pituitary gland is due to - ANSWER Negative feedback
inhibition
Which of the following statements about human placental lactogen (hPL) is NOT TRUE: - ANSWER It
decreases maternal blood glucose
Which of the following hormones is important in the initiation of puberty - ANSWER GnRH
Neurotransmitter release would be inhibited by - ANSWER Blocking Ca2+ influx in the axon terminal
Blocking ____ channels would prevent neuron repolarization. - ANSWER K+ (potassium)
Which of the following is TRUE of cardiac and smooth muscle: - ANSWER Cells electrically coupled by
gap junctions
Parasympathetic postganglionic neurons release the neurotransmitter ____; most sympathetic
postganglionic neurons release the neurotransmitter______. - ANSWER Acetylcholine: norepinephrine
Referring to the figure below, select the anwser which correctly identifies whether the activation gate of
the voltage gated sodium channel is open or closed as well as whether the inactivation gate of the
voltage gated sodium channel is open or closed at the selected time point. - ANSWER Time point 3:
Activation gate open and inactivation gate closed
Provided below are the pressures in the left atrium, left ventricle, and aorta at a given point during the
cardiac cycle of two different NORMAL patients. Based on the three pressures, what phase of the
cardiac cycle is each of the two patients in?
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Patient 1
Atrial pressure: 10 mmHg
Ventricular pressure: 115 mmHg
Aortic pressure: 110 mmHg
Patient 2
Atrial pressure: 10 mmHg
Ventricular pressure: 70 mmHg
Aortic pressure: 85 mmHg
aPatient 1: Ejection,Patient - ANSWER Patient 1: ejection
Patient 2: isovolumetric Contraction
Which statement is true? - ANSWER Cardiac output is the product of ventricular stroke volume and
heart rate
A person feels "light headed" when he stands upright. Blood pressure measurements reveal a significant
drop in pressure upon standing. What is the most likely explanation for this? - ANSWER reduced cardiac
output
Substance "X" is present in the urine. Does that prove it is filterable by the glomerulus? - ANSWER No.
It's possible it was filtered, but it may also have been secreted by the tubules
A patient has an adrenal tumor that continuously secretes large amounts of aldosterone. What is the
effect of this on handling of potassium by the kidneys? - ANSWER Potassium excretion is high
Long- term regulation of blood pressure depends on - ANSWER Control of renal retention vs excretion of
sodium and water
Which of the following is stimulated in response to a decrease in blood pressure? - ANSWER Renin-
angiotensin- aldosterone system