Bio Lab Test 1

Question 1

The left and right _______________ join to form the superior vena cava on the ___________________

Answer 1

The left and right Brachiocephalic Vein join to form the superior vena cava on the upper right side of the chest

Question 2

The Brachiocephalic Veins are the majors veins returning blood to the _____________

Answer 2

The brachiocephalic veins are the major veins returning blood to the Superior Vena Cava

Question 3

What is the cavity in the right atrium called?

Answer 3

Fossa Ovalis

Question 4

Which feature of the heart separates the left and right ventricles?

Answer 4

Interventricular Septum

Question 5

Muscle columns in the right and left ventricles are called _____________

Answer 5

Trabeculae Carneae

Question 6

What is the function of the Trabeculae Carneae?

Answer 6

Trabeculae Carneae are muscles columns in the left and right ventricles; they work similarly to the papillary muscles where their contractions pull on the Chordae tendineae, preventing backflow towards the atria

Question 7

Which structure of the heart is responsible for initiating the heartbeat and where is it located?

Answer 7

The Sinuatrial Node is responsible for initiating the heartbeat, and it’s located in the right atrium of the heart

Question 8

The electrical impulses of the heart are controlled by special groups of cells called _________. What are two examples of such?

Answer 8

The electrical impulses of the heart are controlled by special groups of cells called nodes (example: atrioventricular node, sinuatrial node)

Question 9

The __________ is responsible for the contraction of the upper heart chambers

Answer 9

The Sinuatrial Node is responsible for the contraction of the upper heart chambers (atria)

Question 10

The __________ contracts the lower heart chambers, after the contraction of the upper heart chambers initiated by the__________

Answer 10

The Atrioventricular Node contracts the lower heart chambers (ventricles) after the Sinuatrial Node contracts the upper heart chambers (atria)

Question 11

The heartbeat occurs in the following order:

1. The _________ sends out electrical impulses, initiating the heartbeat
2. The _________ contract
3. The _______ sends an impulse to ___________
4. The __________ contract or pump
5. The ________ sends another signal to ____________ to contract, which starts the cycle over again

Answer 11

The heartbeat occurs in the following order:

1. The Sinuatrial Node sends out electrical impulses, initiating the heartbeat
2. The Upper Heart Chambers (Atria) contract
3. The Atrioventricular Node sends an impulse to ventricles
4. The lower heart chambers (ventricles) contract or pump
5. The Sinuatrial Node sends another signal to the atria to contract, which starts the cycle over again

Question 12

Label the electrical impulse systems of the heart shown below

1. ______________
2. ______________

Answer 12

1. Sinuatrial (SA) Node (The cardiac pacemaker)
2. Atrioventricular (AV) Node

Question 13

The Posterior Interventricular Artery is a branch of the __________

Answer 13

The Posterior Interventricular Artery Is a branch of the Right Coronary Artery

Question 14

What are the branches of the left coronary artery?

Answer 14

The anterior interventricular artery and the circumflex artery

Question 15

The _______ is a blind pouch where the small intestine joins the large intestine

Answer 15

The Cecum is a blind pouch where the small intestine joins the large intestine.