Lab 5 Past Questions Del 4

Question 1

Define vital capacity?

Answer 1

• the maximal volume expelled after maximal inspiration (VC=ERV+IRV+VT)

Question 2

What happens with the heart rate during inspiration? Explain.

Answer 2

During inspiration the heart rate is higher than during expiration.
Because DRG nuclei inhibis the vagal nuclei during inspiration.

Question 3

What is meant by respiratory sinus arrhythmia (RSA)?

Answer 3

changes in heart rate in connection with respiration

Question 4

Donder’s model

Answer 4

• glass bell, rubber sheet, two rubber balloons and a cannula connected to a manometer

Question 5

Effect of Hypocapnia

Answer 5

• If it provides more air than requires, can cause dizziness. Hyperventilation)

Question 6

Define minimal volume?

Answer 6

• achieved when lung collaps. Fraction get into interstices by diffusion at first breath