Anatomy and Cell Biology 3319 Lecture 33: 3rd Quarter Notes

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teallion850

24 Oct 2018

School

Western University

Department

Anatomy and Cell Biology

Course

Anatomy and Cell Biology 3319

Professor

David Cechetto

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Document Summary

Acb lecture 33 (11) systemic circulation: principal arteries. Heart will beat without innervation at rate determined by sa node. Heart rate also determined by cardiac centers in the reticular formation of the medulla. Parasympathetic innervation (branches of vagus - purple) releases ach at sa node, av node and coronary arteries to decrease heart rate and force of contractions. Sympathetic innervation from cervical and upper thoracic chain ganglion (green) releases ne at sa node, av node and cardiac muscle to. Sympathetic travels down to the sa and av node and muscles fibers and releases norepinephrine which speeds up hr. Systemic circulation major from subclavian artery: blood supply to upper limb origins largely, subclavian artery then travels under clavicle until it gets to border of first rib. It then changes name to the axillary artery, which travels through the armpit/axilla: gets to border to teres major and changes name again.

Related Questions

Question 1

A moderate increase in extracellular potassium will

		Increase heart rate due to a more negative E_K
		Decrease heart rate due to a more negative E_K
		Increase heart rate due to a less negative E_K
		Decrease heart rate due to a less negative E_K

Question 2

Apply Atropin will directly

		Decrease parasympathetic innervation and increase heart rate
		Increase parasympathetic innervation and decrease heart rate
		Decrease sympathetic innervation and increase heart rate
		Increase sympathetic innervation and decrease heart rate

Frog ECG is recorded using

		An electrical stimulator
		Three wires including the one that is connected to the hook
		A force transducer
		Three wires and a force transducer

Question 4

How would you differentiate atrial contractions fromventricular contractions?

	A.	Observe the heart beating and tap the table to label it
	B.	From the size of the contractions
	C.	Correlate it with the electrical trace, if the electrical traceis typical.
	D.	Both A and C

Question 5

In this week's experiment, _________signal(s) will be recordedto study the frog cardiac functions.

		mechanical (contractile)
		electrical (ECG)
		both mechanical and electrical
		blood flow

Question 6

In this week's experiment, the heart is hooked at the________

		either atrium or ventricle
		ventricle
		atrium

		sympathetic/increase
		parasympathetic/decrease
		Sympathetic/decrease
		parasympathetic/increase

Question 8

The frog heart can be slowed or stopped by over stimulation ofthe vagus nerve. When apply ACh to the heart, if the frog heartstop beating, you should

		Wash the heart with warm Ringers
		Apply a few drops of Isuprel
		Massage the heart
		All of the above
		Observe the trace and do nothing

Question 9

The pacemaker in the frog heart is the __________ and thepacemaker in the mammalian heart is the ________

		AV, SA node
		SV, SA node
		SA, SV node
		SA, SA node

Question 10

Which of the following statements is TRUE regarding the frogheart

		There is no autorhythmic cells found in the frog ventricle.
		Oxygenated and deoxygenated blood are mixed completely insidethe frog ventricle
		There are two atria and two ventricles.
		Deoxygenated blood flows to the frog lungs and skin.

yellowbadger252

1) The external layer of the heart wall is the

Multiple Choice

endocardium.

myocardium.

epicardium.

parietal pericardium.

2) Check all that are characteristics of cardiac muscle.

Check All That Apply

Cells are long and cylindrical.

Cells are short and branching.

Cells have multiple nuclei at the periphery of the cell.

Cells have one or two nuclei in the center of the cell.

They are composed of thick and thin filaments.

The functional contractile unit is the sarcomere.

3) Match the chamber of the heart with the structure(s) from which it receives blood.

Coronary sinus

Pulmonary veins

Right atrium

Left atrium

Match each of the options above to the items below.

Right atrium

Right atrium Open choices for matching

Right ventricle

Right ventricle Open choices for matching

Left atrium

Left atrium Open choices for matching

Left ventricle

4) The less extensive distribution of T-tubules contributes to the more delayed onset and prolonged contraction of cardiac muscle tissue compared to skeletal muscle tissue.

True or False

5) The cells of the ___________ act as the heart's pacemaker, which establishes the pace for cardiac activity.

Multiple Choice

atrioventricular (AV) node

sinoatrial (SA) node

atrioventricular (AV) bundle

Purkinje cells

6) Match the cardiac vein with its description.

Travels close to the right marginal artery

In posterior interventricular sulcus

In anterior interventricular sulcus

In the posterior portion of cornary sulcus

Match each of the options above to the items below.

Great cardiac vein

Great cardiac vein Open choices for matching

Middle cardiac vein

Middle cardiac vein Open choices for matching

Small cardiac vein

Small cardiac vein Open choices for matching

Coronary sinus

7) Parasympathetic innervation to the heart comes from the medulla oblongata via the left and right ___________ nerves.

8) Check all that are components of the sympathetic innervation of the heart.

Check All That Apply

Cervical sympathetic ganglionCervical sympathetic ganglion

Spinal cordSpinal cord

Vagus nerve (CN X)Vagus nerve (CN X)

Cardiac nerveCardiac nerve

Sympathetic postganglionic axon

9) Check all that occur during ventricular contraction.

Check All That Apply

The AV valves open to allow blood to enter the ventricles from the atria.The AV valves open to allow blood to enter the ventricles from the atria.

The semilunar valves remain closed to prevent backflow of blood into the ventricles.The semilunar valves remain closed to prevent backflow of blood into the ventricles.

The semilunar valves open to allow blood to flow into the large arteries.The semilunar valves open to allow blood to flow into the large arteries.

The AV valves close to prevent backflow of blood into the atria.

1) Check all that are components of the sympathetic innervation of the heart.

Check All That Apply

Cervical sympathetic ganglion

Spinal cord Spinal cord

Vagus nerve (CN X)

Cardiac nerve

Sympathetic postganglionic axon

2) Check all that occur during ventricular contraction.

Check All That Apply

The AV valves open to allow blood to enter the ventricles from the atria.

The semilunar valves remain closed to prevent backflow of blood into the ventricles.

The semilunar valves open to allow blood to flow into the large arteries.

The AV valves close to prevent backflow of blood into the atria.

3) Put the pattern of circulation into the correct order, beginning with the pulmonary circulation.

Blood enters the plumonary arteries and travels to the lungs.

Blood leaves the right side of the heart.

Blood enters the plmonary veins.

Blood enters the system arteries.

Blood delivers oxygen to the tissues, and then enters systematic veins.

Blood enters the left side of the heart.

4)Check all that are characteristics of cardiac muscle.

Check All That Apply

Cells are long and cylindrical.

Cells are short and branching.

Cells have multiple nuclei at the periphery of the cell.

Cells have one or two nuclei in the center of the cell.

They are composed of thick and thin filaments.

The functional contractile unit is the sarcomere.

Anatomy and Cell Biology 3319 Lecture 33: 3rd Quarter Notes

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