Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Chapter 10 > Beating Faster > Flashcards

Beating Faster Flashcards

0
Q

Myogenic means that it does not need…

A

Stimulation by a nerve to make it contract

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
1
Q

The heart muscle is…

A

Myogenic

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

The cardiac cycle starts when impulses are generated by the…

A

Sinoatrial nose (SAN) in the wall of the right atrium

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

The nervous system can change the rate at which the heart beats due to the medulla which contains a region called the …

A

Cardiovascular centre

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

The cardiovascular centre receives impulses from…

A

Various receptors in the body

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

HR is increased when…

A

Carbon dioxide builds up

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Exercise = muscle cells respire more and produce more CO2 which…

A

Lowers the pH

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Fall in pH is detected by chemoreceptors in the:

A

medulla, carotid body and aortic bodies

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Chemoreceptors send impulses along…

A

Sensory nerves to the cardiovascular centre in the media

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Result of impulses along sensory nerves to CV centre = more impulses are passed along the…

A

Sympathetic nerve from the CV centre to the SAN

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Sympathetic never stimulated the…

A

SAN to send out more frequent impulses = increasing HR

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

When CO2 levels fall- chemoreceptors detect this and send send impulses to the…

A

CV centre in the medulla

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Decrease in CO2 = more impulses sent along the…

A

Parasympathetic nerve to the SAN = slowing HR

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Blood pressure increases during exercise as the body muscles contract…

A

More strongly

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Blood pressure increase, increases the rate at which deoxygenated blood returns to the heart in the…

A

Venae cavae

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Due to the increase in deoxygenated blood returning to the heart in the venae cavae the walls are:

A

Stretched by this increasing blood flow = heart rate increases

16
Q

The increased vole of blood stretches the heart muscle, resulting in the heart muscle…

A

Contraction more strongly during systole = pumping out more blood each time it contracts

17
Q

The volume of blood pumped out by the heart during one beat =

A

Stroke volume

18
Q

Volume of blood pumped out by the heart in one minute =

A

Cardiac output

Stroke volume x heart rate

19
Q

The increased stroke volume stretches the walls of the…

A

Aorta and carotid arteries

20
Q

Pressure receptors are in the…

A

wall of the aorta and carotid sinus in the carotid artery

21
Q

The pressure receptors in the wall of the aorta and carotid sinus detect stretching and…

A

Send impulses to the CV centre in the medulla

22
Q

As a result of the impulses from the pressure receptors in the aorta wall and carotid sinus to the CV centre, more impulses are sent along the…

A

Parasympathetic nerve to the SAN, slowing HR

23
Q

Carotid body =

A

Chemoreceptors (blood pH)

24
Q

Carotid sinus =

A

Pressure receptors (blood pressure)

Chapter 10 (8 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions