Author Question: Considering the negative feedback system for the control of blood pressure, when a blood pres-sure ... (Read 34 times)

futuristic

  • Hero Member
  • *****
  • Posts: 638
Considering the negative feedback system for the control of blood pressure, when a blood pres-sure rise is noted in the arterial receptors, what is the expected response?
 
  a. Arterial vasoconstriction
  b. Decreased inotropic state
  c. Increased heart rate
  d. Venoconstriction

Question 2

In order to function effectively, the central cardiovascular control center must receive signals re-garding changes in blood volume or pressure. From where do these signals come?
 
  a. Central chemoreceptors
  b. Hypothalamus
  c. Peripheral baroreceptors
  d. Skeletal muscles



angrybirds13579

  • Sr. Member
  • ****
  • Posts: 344
Answer to Question 1

ANS: B
In the case of the arterial receptors, a rise in blood pressure increases aortic and carotid receptor stretch, and thus the discharge rate. The increased discharge rate causes an opposite response by the medullary centers (i.e., a depressor response). Venomotor tone decreases, blood vessels dilate, and heart rate and contractility both decrease.

Answer to Question 2

ANS: C
The greater the blood pressure, the greater is the stretch and the higher is the rate of neural dis-charge from the peripheral baroreceptors to the cardiovascular centers in the medulla.



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
 

Did you know?

Patients who have undergone chemotherapy for the treatment of cancer often complain of a lack of mental focus; memory loss; and a general diminution in abilities such as multitasking, attention span, and general mental agility.

Did you know?

Multiple sclerosis is a condition wherein the body's nervous system is weakened by an autoimmune reaction that attacks the myelin sheaths of neurons.

Did you know?

Tobacco depletes the body of vitamins A, C, and E, which can result in any of the following: dry hair, dry skin, dry eyes, poor growth, night blindness, abscesses, insomnia, fatigue, reproductive system problems, sinusitis, pneumonia, frequent respiratory problems, skin disorders, weight loss, rickets, osteomalacia, nervousness, muscle spasms, leg cramps, extremity numbness, bone malformations, decayed teeth, difficulty in walking, irritability, restlessness, profuse sweating, increased uric acid (gout), joint damage, damaged red blood cells, destruction of nerves, infertility, miscarriage, and many types of cancer.

Did you know?

The Centers for Disease Control and Prevention has released reports detailing the deaths of infants (younger than 1 year of age) who died after being given cold and cough medications. This underscores the importance of educating parents that children younger than 2 years of age should never be given over-the-counter cold and cough medications without consulting their physicians.

Did you know?

Eating food that has been cooked with poppy seeds may cause you to fail a drug screening test, because the seeds contain enough opiate alkaloids to register as a positive.

For a complete list of videos, visit our video library